Are Disc Brakes Here To Stay? | GCN Tech Show Ep. 29

[@gcntech]

Are you a fan of disc brakes on road bikes? 👇

[@jen3800]

not if the maintenance and cost outweigh the tech benefits. i do not want to be forced to follow a market i cannot afford, nor need. rim brakes work. if it ain't broke, don't fix it.

[@grahamtricker4103]

Definitely a fan of Disc brakes and definitely a fan of Bike fit too...

[@Axel7pineapple]

Yes

[@markusmencke8059]

Fan. Definitely. The benefits outweigh anything for me personally. And even mechanical discs are an impressive improvement. I have those on my gravel bike (Tiagra group).

[@WoodsMoose]

Definitely fan of disc brakes. Started using them in 2015 and have never looked back ....

[@coldforgedcowboy]

@GCN Tech..... One of the over looked advantages of disc brakes is the rims no longer have to be designed to take the thermal heat stress of rim brake heating and be can further optimized for structural loads which make them lighter and cheaper.

[@JogBird]

99.99999% of bike wheels sold are aluminium

[@kidkarbon4775]

Shifting the braking surface from the rims to rotors that attach to the hub has enormous ramifications for wheel design and although disc-specific rims no longer need a braking track thus allowing some reduction in weight. The fact remains that the rims will still need to be strong enough to withstand pressures well over 100psi in the tyres, so the amount of weight that can be shed will be modest at best. Any weight lost from the rims will be offset the extra weight of the hubs and rotors. Shimano’s Centre Lock system for example allows for lighter hubs than standard six-bolt mounts, but extra material is still required to ensure the hub can withstand substantial braking forces. In addition, a minimum of two-cross lacing is required to contend with the forces of braking as well. Front wheels will suffer the biggest weight penalty due to heavier hubs and more spokes. Thus, disc-equipped wheelsets will typically be heavier than traditional wheels in the same way that clincher wheelsets will typically be heavier than tubulars.. I personally have a set of AX Lightness Ultra 25T which weighs 790g for the entire wheelset, I'm yet to find any disc wheelset that comes close to it from a weight perspective.

[@maniac0303]

@se7enTse7en: Are you ever riding with rim brakes in the wet?!? I had to replace my rim brake pads (Shimano Ultegra) about 3-4 times a year. The same now with disc brakes.

[@terbennett]

This is why disc brakes are being offered on road bikes in the first place. Disc have been used on MTB for close to two decades, and they just figured out that it is an excellent option? No, they have spent millions on R&D trying to make a carbon wheels that can dissipate heat well with very little lucky. Modern ones are better, but the issue remains. The solution? Move the brakes. The obvious option would be to go to disc since it was a proven concept , meaning less expensive to modify than an entirely new design. It's here to stay, no doubt.

[@terbennett]

The CAAD5 you saw was the Stars and Stripes Commemorative Edition bike or some call the 9/11 Memorial bike. Shortly after 9/11, five firemen from NYC went on a goodwill bike run from NYC to Los Angeles. Cannondale donated custom bikes for this trip. They were CAAD5 with upgraded parts and a very custom "stars and stripes" paint job. In 2002 Cannondale decided to make a limited production run to sell them to the public. As a bike, it's just a CAAD 5, which is a great bike, but what that somewhat ostentatious paint job represents, makes them special.

[@astralthief2334]

Listen, it's really simple. Rim brakes have that amazing iconic look...especially with Campagnolo wheels. But disc brakes are also good looking, especially on the more aerodynamic bikes, and they function significantly better in all weather conditions. The minor weight penalty, which will soon vanish, is well worth it (just loose a couple hundred grams of fat). And since pros tend to need to add weight to hit the UCI limit why not add functional weight instead of dead weight. Bottom line...disc brakes are here to stay.

[@chaosengine3772]

Here to stay, yes. But in great numbers? No... They been around for 50 years. If manufacturers were so confident about them becoming dominant, then who o why the MTB designs? Still waiting for that sexy lightweight, single or dual pot calipers to show up.

[@astralthief2334]

So has carbon fiber, so...

[@bigfoz8465]

The 100 year old shaft drive looks more integrated than the new CeramicSpeed one!

[@jaysell6179]

Why haven't we started "keying" seat posts? As in, making it non circular or with a small ridge to make the saddle always perfectly aligned with the frame? I know some aero bikes do this now but why did this not trickle over to traditional frames and posts?

[@jonabub]

by order of the peaky blinders: Greetings to Matt and the whole team AND you are now ordered to give us more of those historic coincidencies with the present. THANK YOU!

[@Wildschwein_Jaeger]

Good job on researching the chainless roadster. The rub was the claim that the ceramic drive was a new idea. The only thing novel was the use of ceramic bearings but all else was an old idea. Not all new as claimed. Good job correcting the message. What about inducting the Brooks saddle?

[@sickunit2096]

A disc and caliper mounted to the frame with a quick change hub would solve the possible issues of a quick wheel change. The hub would essentially slide into a slot or locking mechanism on the permanently mounted disc carrier on a frame dropout. Just a thought 🤔

[@jonburnell532]

The Chainless Roadster would cost £2,446 in equivalent money today.

[@JonCannings]

Jon Burnell put me down for one.

[@jonburnell532]

Jon Cannings Bit of a bargain isn't it, I can't imagine the Ceramic Speed will be that reasonable.

[@JS-tb9hu]

That’s crazy!

[@itarry4]

Have to say the fact Sagan is using Disc Brakes on his bike in the Tour is possibly the least surprising of any rider. If anyone was going to be an early adopter it's him with his back ground in Mountain Biking. He's already well used to using them and how they work, plus his experience with them means he already trusts them to work and understands how quickly a wheel change is.

[@itarry4]

As for Sky needing a extra truck or whatever for the bikes they used on the Roubaix stage at the Tour, let's not forget that Sky are probably the only team to still only have the one bike choice for every stage. Most of not all the other teams have at least a climbing bike and an aero one. Then you even find a few teams who have the climbing version and then they have the aero bike in both disc brakes and rim brake versions for a few of their riders. So even at a Tour without the Roubaix stage they need far more bikes, trucks and spare components than Sky would.

[@ZOB4]

The pink bar tape on Van Vleuten's Scott frame pops like crazy. Definitely a Supernice.

[@martinagiuslia]

I've had my disc mountain bike for five years, with scewers which are much much worse than thru axles. Never bent any disks and traveled also by plane.. never any problems... Pro bikes are so light that the extra disc weight still allows to achieve weight close to 6.8

[@williambate8249]

Better tubeless tyres with sealant may eliminate most of the punctures pro riders are experiencing today. That would be very welcome for disc brake users and no need to practice changing through axle wheels.

[@thijsvandenbroek5333]

William Bate pros ride tubulars not tubeless and tubulars feel so much better in corners. And tubular wheels can be way lighter than clincher wheels

[@williambate8249]

Some new tubeless ride as as nice as tubular. I know because I have both and find the ride quality very similar. I believe GCN can confirm this in one of their videos.

[@PazLeBon]

They should have to fix the puncture rather than use a spare wheel or bike

[@coldforgedcowboy]

@GCN Tech ......The problem with using an AI to do aerodynamics is that it is only as good as the data you feed it. An AI doesn't know when it has been feed crap data where as people do. A good example of this is the 2018 McLaren F1 car produced more drag with less down force then their 2017 F1 car. They actually went backwards!

[@Adurianman]

You dont really have to deal with turbulent wind and that many other conditions in this case though, I think the calulations should be a lot simpler for this case?

[@coldforgedcowboy]

I disagree with your statement on turbulent flow because most of the time pro cyclist are riding in the slip stream of the peloton which is aerodynamics modeling hell espically with a cross wind component.

[@Adurianman]

They are talking about world record attempt though..... Which in this case is one of those funny egg recumbent bikes that is unlikely to be used on race or in a group ride. In case of actual pro cycling, I really don't think it matters that much in the peloton as in the peloton or when you're drafting your drag is vastly reduced, and the fact that the rider's drag is way more than the bike's drag anyway.

[@stuartdryer1352]

coldforgedcowboy That plus the end of the world when the robots take over.

[@GunganWorks]

Ultimately, the Battle Mountain streamliners are designed specifically for all out straight-line speed in calm winds. However, there is a group here in the US that races homebuilt streamliners designed for racing in a group. These bikes are a bit slower and more practical, but they still average 33+ mph over the course of an hour-long race. Here is a video of a race in Chicago: kzbin.info/www/bejne/noO9p6OArchorrc And this is the group's website: www.recumbents.com/hpra/

[@andrewmcalister3462]

The weather at TdF has been so good that it hasn't been a major issue for braking. It will be interesting to see how many disc bikes come out if there is a wet mountain stage.

[@gcntech]

True Andrew

[@IdolOracle]

What is/was in Olli's mug this episode? It looks like it's ready to ride a bike on it's own!

[@broadfjord7087]

Disc brakes are far superior than rim brakes in every possible way. Don’t talk to me about how heavy they are, get stronger.

[@tonys.falconchase7325]

True words, well said!

[@chaosengine3772]

Far superior? Not in dry braking! I never felt to need a disc on a road bike. On a MTB, you brake a lot and hard. On the road, not so much...More slowing down than anything.

[@Cynyr]

that Topeak multitool needs a JIS screwdriver instead of (or in addition to) a #2 Philips. I believe most shimano derailleurs are actually JIS screws still.

[@Vam1500]

Another disadvantage to discs: the fork looses some flex and therefore comfort because it has to be stronger to withstand braking forces.

[@GunganWorks]

Recumbent streamliners are some of the coolest bicycles on the planet. The drivetrain alone is worth its own GCN Tech episode. GCN Tech should send a crew to the Human Powered Speed Challenge this year.

[@JonCannings]

Gungan Works who would you like to be the rider/pilot?

[@GunganWorks]

From the GCN crew, I would love to see either Emma, Cannings, or Tom Last in a streamliner. Alternatively, Caleb Ewan has the power profile for a near record-pace run, but it would be difficult to borrow him from the pro peloton for a week at Battle Mountain. But hey, if someone asked if I wanted to pilot a streamliner, I'd volunteer in a heartbeat!

[@PazLeBon]

I dont think they are cool at all. one mans poison n all that

[@GunganWorks]

And why do you not appreciate the streamliners? They certainly look quite different, but they show what is possible when engineering and human power collaborate. The result is a bike that looks more like a sculpture than a machine.

[@GunganWorks]

Simon Andert, I doubt he would fit, unfortunately. Most Battle Mountain streamliners are designed for riders well under 6' tall.

[@stevenanderson22]

Finally got my bike on the show! I’m actually not from Quebec, from Ontario, the picture was just taken there. It was sort of winter. April 20th, 2017. The snow was still melting. Also, I now have two black bottle cages, although still not matching ones...

[@gcntech]

Thanks for sending it in Steven!

[@BartSchrijvers]

I was sceptical at first and forced to buy this years bike with hydraulic discs. It felt a bit underwhelming on my first rides to be honest... After a view weeks, I took my old bike out for a spin and was shocked how bad those brakes are. I'm sure most riders will prefer disc brakes once they've got used to them. Somewhere in the back of my mind, I always thought the pro's would never go discs since they loose crucial seconds when replacing a wheel. And albeit not that crucial for me, I do miss the ease of removing a wheel from my bike.

[@ferryengr]

As the pros begin to use disc brakes more extensively, it will force the component manufacturers to improve the brakes to address the problems like brake rub. With a little thought, they could design better adjustment mechanisms to re-align the caliper when the wheel comes off and goes back on. They could even use sensors and servos to automatically realign the calipers. With the 6.8 kg weight limit for pro bikes, weight is not so much a factor if the brake alignment becomes more sophisticated.

[@ragzard]

Ollie and John seems to get along nicely. I would love to have a coffee or a beer with those two. Please Si, dont be jealous. You are invited as well of course.

[@gcntech]

if you see Ollie and I out and about, feel free to buy us a coffee, or better still - a beer. Cheers, Jon

[@ragzard]

Deal!!

[@gpurkeljc]

Regarding the specialist equipment afforded to some riders on the cobbles stage perhaps pro cycling should be like Formula One and have a limited number of frames, wheels etc that they can use at each event to help level the playing field between the different teams. As for discs I'm happy with my eleven year old Look 595 but if I was in the market to buy another bike it would most likely have disc brakes. Removing the braking duties away from the rim and optimising its design for its primary purpose just makes complete sense.

[@patmoore2782]

Always listed by GCN hosts as a disadvantage of disc brakes for pros seems to be the time it takes to change wheels with thru-axles. I just bought a new Cannondale hybrid with disc brakes AND quick release axles, front and rear. They work great - so far no issues with alignment of the rotors after re-installing the wheels. Does UCI insist on thru-axles with disc brakes for the tour? If so, what's their rationale?

[@davidbierbaum4881]

I'm not surprised at all by the survey. Bike fitting costs money, and not small change, either. All us penny pinchers out there aren't going to shell out money for the bicycle equivalent of a tailor, when our own... er... sewing skills are just barely adequate for our needs, bicycle-wise. ;)

[@PazLeBon]

dude, they wear fkn lycra, they will do all sorts of shit lol

[@THEdavehogue]

Ollie bringing it in strong with " 'Murica!!"

[@ajl320ise]

I’m upgrading my 2x8 shimano Claris setup to 105 2x10 i:e shifters front and rear mech, cassette and chain. Can I use the Claris compact chainrings with the 105 setup or do I have to get 10 speed specific chainrings.

[@PeterPutz82]

COME ONNNN GCN, can you please get Ollie to test the new breed of aero bikes on the velodrome... mainly the Cannondale.. IS IT THE FASTEST?!?!

[@gcntech]

maybe riding clockwise too. be fun to see. Jon

[@mikeylikesit6588]

I have a tech question about the B.B. on my track bike/ commuter. I’m running sram omnimoniums with gxp bottom brackets. I’m about a thousand miles into them and it’s developed a loud clicking. So do I do a normal service and bearing replacement and risk servicing again before the seasons out. or do I use the opportunity to drop 170 bucks on a Phil wood B.B. This bike is my everyday rider. Average 75 miles a week in all weather. And I do love it so.

[@JasonSmith-kk3tp]

The Quebec photo is Spring in the Gatineau Hills just outside of Ottawa (most popular route in ottawa). Dan, can you pronounce Ottawa please? Just once more.

[@dalethornington1527]

That last bike is at Champlain Lookout about 30 km north of the Ottawa river (35 km from Ottawa) in the Gatineau Hills. I cycle there as obtain as I can, as do a lot of other cyclist being one of the highest point in this area. Picture was most likely taken in the late fall. Can't get up there in the spring til the snow melts. By then the vegetation is nice and green.

[@Blah-blah-sure]

lets come clean disc brakes are here to stay because bike sells would've stagnated because caliper brakes work just fine, and are simple to adjust/ replace pads. The difference is in your credit card, disc brakes have a $500. markup and more , if the average person had to use cash only then disc brakes wouldn't even be a topic. Also most people by choice don't ride in the rain or hellacious hills as where i live I have nothing but peaks &valleys of 6/7%. And yes I have 2 road caliper bikes circ. 2010 & 2011 and Roubaix elite & realized its really about confidence in your riding in these said conditions.

[@845Piper]

The picture of the Specialized Allez is taken in Gatineau Park, just north of Ottawa, in early spring

[@devanois]

I’ve been using disc brakes on MTB for 11 years, a bit more than 2 years on road bikes and I have not had any of the issues you talk about as to wish to go back to rim brakes. I’m glad that I have disc brakes now on road bikes because braking is not a luxury for people with big pockets anymore and I do not need to replace wheels because of damaged rims to restore braking power or having to suffer and ineffective brakes because of damaged rim or worn brakes.

[@TheBassallyear100]

"Can I keep it?" well played, Ollie! I'd be asking that question a lot in the GCN tech studio!

[@gcntech]

Ollie was forced, at spanner point, to hand it back. He's a fast learner ;-) Jon

[@wadelewington9999]

You know as I get older and the more I treat the scene with the distain that it deserves(you still have to pedal it after all) and can actually afford the sickest kit and bikes. I care less about new shit and enjoy more the personalities that deliver the info! That's you guys! I think you crew is excellent and Ollie was great acquisition. The whole team is very charismatic and pleasant and goes great with my morning espresso! well nuff said! Cheers

[@Boopop1024]

Red victor, standing by.

[@PrzemyslawSliwinski]

If you (are not a pro and): 1. Ride on a clean tarmac and in good weather exclusively, 2. Have only steep and long ascends but benign and short descends, 3. Weigh less than ten stones, Buy a rim brake bike! ;)

[@micktupman7232]

John is it possible to run Sram etap 10 speed? Carry on using existing 10 speed chain, cassette and crank?

[@richardhudson4649]

It took several weeks to get used to my TT/Triathlon bike. But the geometry and position are so much different that my road bike.

[@PrzemyslawSliwinski]

When you ride 40+ km/h and sweat is head overheating still an issue?

[@garryreeves5952]

@GCN Tech -Can you make a video on how to install discs to a wheel and another (or combined) on how to adjust disc brakes?

[@ralphblundell106]

Discs are here to stay and can only getter better. Rim brakes are perfectly ok as well. Have both, love both.

[@Pratalax]

I'm fairly sure that's a 500ml bottle in that shot, but an insulated one. because of the space the insulation takes up, it needs to be longer, making it look like a 750. Ollie's point is a good one though, maybe we will see bigger bottles in the future!

[@JS-tb9hu]

Pratalax nah some are definitely 750. Sky also had some larger ones the other day

[@TheWaxChainFanClub]

More and more lovely helmet fans coming out. Beautiful.

[@glennoc8585]

Disc caliper adjustment will be Able adjust with a micro lever on the shifter or caliper

[@LegSpinna]

Anyone else struggle with the background music? Drives me up the wall once I notice it.

[@ninaaltschenk7930]

In disc vs calipers: I dont ride with open calipers anytime. Imagine decending with 75 kmh and a open caliper brake. Thats suicidal

[@jamesmoore15]

With regards to the comment about Sky needing a whole set of separate bikes for the "Roubaix" stage... It's worth noting that they only use one aero optimised F10 rather than having a climbing bike and an aero bike. Therefore, logistically, it may not be so extravagant to all have a separate K10 just for cobbles.

[@jamesbrown9608]

The bottles Movistar are using, are thermal bottles to keep drinks cooler for longer

[@veloriderkm]

Are riders not picking discs for the pro peloton because they'd rub during out of saddle sprints? Disc climbing bikes can be 6.8 without much fuss so it's not a weight penalty. Is it simply just quick wheel changes? Is it the disc rub? Is it fear of change?

[@coldforgedcowboy]

veloriderkm.... It is because the neutral service car isn't yet equiped with disc brake wheels, once that gets sorted out then it will be adopted.

[@TeslaOsiris]

The wheel change speed is still an issue... But surely a QR TA isn't far off.

[@vaporisedair4919]

3:50 3000bhp what's that in Watts? What's it's FTP?

[@JonCannings]

Old Major lots

[@IGotsBadFeeling]

2237100 W. Let's say the car weighs 2000 kg. That means it has an FTP of 1118 W/kg if the car could actually deliver it's 3000 hp for a full hour.

[@baley7]

Onypop I am under the impression that, that car would run out of fuel or even overheat and explode in less than an hour if it were to be going full gas. A bit like it happens to me when I try to test my FTP!

[@deadundead]

2237099.616 Watts

[@dannycwalters]

At 12:50, Lotto NL Jumbo didn’t need all of the extra “comfort tech” because their Oltre XR4’s already had it built in with CounterVail. Comfort AND Performance. #noterminators

[@getshifty]

RideLondon-Surrey 100 this weekend.... total washout.... deep section carbon wheels, rim brakes... every long descent was butt clenching and had me longing for discs!

[@gcntech]

Are you converted?

[@SilverKnightVF]

Disc brakes for pros OK! For us amateurs I guess not. I own a road disc brake bike and there's a big issue that I never see you talking about.. Pads simply don't last.. My last set of pads on the front end lasted only 2 months (almost 2000 km) and my bike hasn't reached the 10k km yet and I'm already looking a the front rotor thinking that it won't last until the end of the year. By the way I leave in Madeira island which is quite hilly so we do a lot of descents and probably it has a big impact the the pads short lifetime... But still I think it is big shortcoming of disc brakes. Hope you take this into consideration next time disc brakes comes to topic. Cheers lads 👍

[@HECTORBIDO]

I am a fan of disc brake

[@JWH.Design]

£19 in 1898 is equivalent in purchasing power to £2,346.89 in 2017

[@gcntech]

Woah!

[@pictus1]

You guys should have a super nice viewer choice for everyone that reaches nice to be presented next time just like the pro bike. #underdog

[@benstanden8784]

Lots of CFD packages are already able to optimise designs for improved aerodynamics. Composite design packages are already able to optimise CFRP layup for stiffness and weight. Discs are here to stay without a doubt. The pros now either don't care (or don't care enough not to ride a disc brake bike), the big name companies are already producing disc brake only bikes on their latest models. The only real effort/annoying thing with disc brakes is if you are regularly setting up bikes, they are a bit of a faff - easy to do though.

[@matthewgiem5669]

love the bike vault!! but maybe remove the pic in pic for at least part of the shot cause I wanna see the whole bike!

[@gcntech]

Glad you liked it Matthew

[@s2korpionic]

Yes, this will be the turning point for disc brakes. Shimano and SRAM needs to get their stuff together and allow bigger tolerances to prevent disc rub.

[@kay19833]

Disc brakes are another option. You want to do roadriding in an unpredictable weather area? superb braking, a little bit more maintenance but hey! it's tit for tat. I am definitely getting one for winter rides and rainy seasons otherwise nothing like the simplicity and the better looking rimbrakes.

[@KriegKadaver]

1:05 "I cannot confirm or deny whether or not that is actually happening" Thanks Bill Clinton!

[@paulpaul5606]

I’ve got a Fuji With though axles never had a Rubbing dis. Love them

[@dannycwalters]

With regards to the Colnago Concept, exceptionally built bike, but I would like to see an “out front” computer mount versus a top of stem mount. Keep it aero, son!

[@1Mrsensitive]

the sales person said..'Disc brakes, once set up they are then maintenance free'..what a joke? most of my bike maintenance time is spent keeping the DB in tune...I used to have the bike shop do it..even they could get it right..and they charge £30 per brake, what a rip off! now I do it, and I do it right..but its work in progress, If I was an MTB rider then Disc Brakes are a must... But for road and general riding rim brake are my preference now!

[@noahmills2884]

Degenkolb's Roubaix stage winning bike coming?

[@EvilBambo0]

I'm sure most of the pro riders ride disc because they chose to and not being forced to, so discs are here to stay. For us not racing I think it's a no brainer, I would like to have more consistant braking in all weather conditions and change rotors or pads instead of rims. I can see the chemistry working between Ollie and Jon, Ollie seems like a gear-nazi too, maybe even more so than Si from what I can sense. Keep up the good work!

[@tfmaus]

Perhaps somebody here can help me...I have a 14 speed road bike (Tourney A070 entry level Shimano groupset) and I'm thinking about changing the crankset and bottom bracket for a Sora model FC-R3000. Since both cranksets are 50/34, do I have to change anything else or is all there is to it?

[@craigpaterson5085]

Have not used disks myself but with more and more top riders using them , more manufacturers making racy disk brake bikes and British cycling now allowing disks in competition - my next bike will probably have disks. They need to be hydraulic though

[@elkabonk]

Just watched a video on your sister channel (GMBN) about the new Shimano XTR group and it raised a question I have about 1x. So, they didn't mention but I'm guessing 30? up front and they pointed out the whopper 51 in the rear. I get the basic Physics and, also, for mountain bikes, BB clearance, but... with so many road bike companies offering 1x setups, (11 to HUGE), what really makes it better? Why haven't we been riding 35/25 double chainrings for years before going single, and at what does rotational force (outboard weight from the cogs) really have to do with the rear hub? Maybe thats less important because it's straight to the hub, as opposed to heavy tires. #askGCNTech

[@nstrug]

Isn’t the biggest concern with disc brakes in the pro peloton the problem of neutral service? Unless everyone standardises on disc diameter/QR/through axle, there’s a chance that the neutral service moto isn’t going to have a wheel that will fit your bike.

[@hossesarse]

Another advantage to the larger 750ml bottles is they act as a fairing for the rear wheel for better aerodynamics.

[@georgehugh3455]

Good discussion items and comments regarding pros' jerseys, helmets and bottle sizes.

[@abchaplin]

You were disrespectful of the background Stephen Anderson chose for his Specialized Allez, grumbling that "It looks like winter." Well, he is in Canada, and until May, when everything suddenly turns green, that is what a good cycling environment looks like. He also took the bike to the top of a respectable climb, Belvédère Champlain in Gatineau Park, so, steady on, lads, you're looking up the Ottawa Valley or, as they say au Québec, la Vallée des Outaouais. www.google.com/maps/@45.5080761,-75.9125683,3a,60y,296.55h,96.2t/data=!3m6!1e1!3m4!1sq_81GmSq1UoLR-3s9HzjUw!2e0!7i13312!8i6656

[@arthurv7679]

the bottles are the thermo ones where the water stay cool. Thats why there are big like that

[@heytreacle]

Oliver! Oliver! Never before has a boy been seen more.

[@limyohwan]

26:10 i think we just found some oil in GCN studios.

[@2scottj]

@GCN Tech I’d like bike manufacturers to consider the rider more when they are optimising for aerodynamics. As the front wheel is the first contact point with oncoming wind resistance, it may be that a less aero design on a bike alone basis is more aero with a rider, as it channels the air over the rider more efficiently. Has anyone tried to do this?

[@lucash41]

It seems strange to me that a team would elect to use a double carcass heavy tubular tire over a pair of Schwalbe Pro One Tubeless tires with some sealant in them. I can understand not wanting to go full tubeless for a regular stage, but when you are going to be hitting the cobbles, why not ride a high-quality tubeless tire and forget about the team car for the whole race? As an added bonus you can ride at a lower pressure and get more grip. Many of the riders were slipping and falling around corners with dry dirt, presumably because their tires were over inflated (or maybe because of unnecessary risks) which just seemed a bit inexcusable at that level.

[@jade4805]

Nice job guys! Disc brakes on road bici !?, well why not. Most of it comes down to safety, reliability, functionality, practicality and it always takes a few years for perfection just before it changes to yet another upgrade. When elex shifting first appeared, it was horrible and hardly any pros liked it or wanted it, now it's everywhere, road disc brakes fall into the same category. It seems that we are currently on a wave of technology, where as science and tech are doing most of the cycling, leaving the cyclist to do minimum effort; ie drastic frame designs, aero vs. lightwt vs. comfort vs. components, helmets, pedals, kits, shoes; you name it. If we jump onboard every new widget that comes out we'll never enjoy the fruits of true riding. :-)

[@gcntech]

Glad you enjoyed this one Jade

[@marinusdansen3851]

A while ago I was driving my road bike with callipers.... if I stopped one meter earlier I wouldn’t have been hit by a car, so definitely disc brakes for me.

[@AndrewTSq]

That american cannondale was super-nice imho.

[@JonCannings]

Andrew N sorry, the judges decision is final 😉

[@Slow_Leak]

Yes - luv the disc rollout and I luv my disc bike

[@gcntech]

What bike do you have Phil?

[@Slow_Leak]

GCN Tech - S-Works Tarmac Disc

[@carlosroy7984]

Disc brakes positives: better modulation, better braking, muuuch better breaking on rain, thru axels give more stiffnes, more aero, wheels remains always perfect (not destrying rims braking on it), when stay up pedaling no need to open the rim brake as lateral movement (less as being thru axels) will not touch the brake. Negatives: bit more weight.... maybe blending the disc could give you some noise.... don't see any more negatives So...... positives are mucho more tha negatives... Go disc brakes go!!:-)

[@stuartdryer1352]

Here to stay. Personally I love how they perform -- except the time I was careless and got some lube on the rear one. That was bad. The maintenance of disks definitely required a bit more mechanical aptitude. Sadly for me.

[@phillippitts6294]

Great show. Discs are here to stay .

[@brianmoore1164]

It is pronounced with a long E sound. Keesler. A beautiful base to ride on and flat as a pancake.

[@PazLeBon]

I dont think theres such a thing as a long E man lmao

[@marty197666]

I don’t see much point in disc brakes where I live in the uk. My r8000 are pretty sharp. However if I lived in a mountainous region I’d def want them! My last experience descending mt teide in Tenerife was a bit hairy!

[@1989srjones]

Interesting, I always just assumed pros weren't allowed to use a bottle bigger than 500ml due to a silly uci rule. Why wouldn't you use a bigger one if you can?

[@MrNumenius]

I think this is thermo bottle.

[@torbar4life]

I think so too. I own Elite Nanogelite water bottle and it looks like the watter bottle on the picture.

[@PazLeBon]

cos they are heavier obviously

[@phxrsx]

What's that thing attached to the chain stay at 11:56?

[@freisianpug]

The only vehicles that use disc brakes currently are all cars, trucks, motorbikes, mountain bikes, snow mobiles, etcetera and so on. They are a superior braking system and to think they won't make their way onto road bikes is, I feel, a little short sighted. Hindsight shows us that the technical concerns can be overcome, as they were with mountain bikes. More reliable brakes, why would you not want that?

[@limyohwan]

Bike fittings cost an arm and a leg. You can rent, borrow, or try it out with second hand bikes and save a lot of money. Also re: LBS perseverance.

[@markreams3192]

Disc brakes are great! It would be difficult to go back to rim brakes. They will become the standard in the pro peloton. There was resistance at first when disc brakes came to mountain bikes. It’s no longer an issue!

[@gcntech]

True Mark, change takes time to be accepted

[@nicholassmith831]

when you said really cool but really old on the wall of fame I thought you were bringing Matt back :)

[@sudduthjonathan]

Discs in the pro peloton are here to stay. They are better brakes overall, and with the advances in weight reduction and aerodynamics of the rest of the bikes, it’s a no brainer except for very special circumstances or stages.