Stringbike 2014.

[@mikelo303]

Is it lighter? More durable? Mud resistant? Basically why you think it's better than current solutions?

[@irbis056]

Same question came to my mind

[@Kris.G]

Also can anyone just cut it with scissors when you're not looking?

[@ericoschmitt]

+gietek You can carry extra (and very light) strings.

[@ericoschmitt]

+mikelo303 Not sure if it is lighter, but doesnt look any heavier. Doesnt look "mud resistant", but then again, mud doesnt seem to affect performance as it does with chains. And it probabily isnt any more durable than a single chain, but it looks simple to replace. If you break one cable, you can probably still get home with just one side, if you dont have extra cable on the spot. I can't tell it is better, but certainly doesnt look any worse. If it is the same price, I would certainly try. But a big use i see for this: You can make possibly any kind of design for the pedal drive, so you can make any kind of applied force graphic during the pedal, and even improve a concept like the oval or osymetric chainring. And another advantage i see is: if it is mass produced, you can have way cheaper shifting. It seems simpler than a derraileur. And you can possibly combine it with an adapted version of Shimano Nexus, or NuVinci hubs. I also think the pedals could be simplified if you added a sheave directly in the outer part of the crank arm, between the pedals and the crank, and also add the gears to the crank. And then, you can add a sheave in the seat tube, just where a front derailleur would be, so the force would be put in the front part of the movement.

[@LaszloPalfi]

+mikelo303 Spring Drive is far more simple and more convinient than chain drive and gear shift mechanism ;-) Spring Drive - consits of less parts and more simple then chain drive as there is NO shifting mechanism on the back wheel, - offers the possibility of shifting while STANDING or while driving UPHILL - is cleaner because it uses NO grease on the outside, - offers smooth driving as there is NO micro vibration caused by the links, - offers immediate starting without the need of turning the pedal into horizontal position, because it automatically repositions the pedal into horizontal position when you take off your foot

[@cahman8]

A lot of people out there saying those string are going to break must not be familiar with some of the man made materials available. 4mm cord is readily and cheaply available with over 1000 lb tensile strength. Go to some exotic materials and I'm sure your looking at several times the strength of any bicycle chain.

[@vitaliygnatenko4832]

What a great try on the endless way of innovation! The string drive concept might show its advantages not only in this marvellous bike but in other bikes in the future as well.

[@demonhog922]

This is a prime example of thinking whether they could, rather then if they should.

[@KillerRaptorr]

Yup totally, Exactly like your poor thinking. Just like the rest of the world and stupid people like you. But hey when real people make something and it comes around, O MY GOSH you're riding it. Just like the guy who made bikes, I mean. We all could walk, or ride houses. Why ride bikes? But now look at the world. OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOHHH!!!!!!!!!!!!!!!!!!!!!!!! Prime example of stupid people like you.

[@demonhog922]

KillerRaptorr they took the concept of a bicycle and made it worse, how am i stupid for it?

[@mikakorhonen5715]

Demonhog Plays Forgive him, no engineering backround.

[@ozzykircali2446]

This system makes it easy to insert and eject the rear tire.

[@bricology]

@@ozzykircali2446 -- _kind of_ . . . but if that's the main advantage, it would be a lot more straightforward to invent a run-flat tire that wouldn't be vulnerable to going flat.

[@sebbes333]

WOW, so much hate on a new idea, instead of just saying that "it's bad", at least say WHAT YOU think is bad so the designer have something to work with. I think it's a really cool idea, it's very informative, you get rid of that oily chain that no one want to touch, it could be quieter than a chain (depending on how the pedal contraption sounds), it seams to be many times easier to change than with a chain (and again, no oil = clean hands after maintenance).

[@МаликОсманов-э6л]

Ну, диванных экспертов никто не отменял!))

[@google-is-the-worst]

They were so busy figuring out how they could, they never stopped to think if they should.

[@Ferelmakina]

It's technically beautiful. I would like to know the advantages of this kind of bike over the regular chain bike.

[@6s9hcr2]

pros could be it has string on both pedals so its better pedalling experience, string replacement is easier, rear tyre can be esily removed, its now lighter as you are pulling less metal (chain and sprokets) and would be a little more efficient to ride (chains links have losses due to friction) But all this can be easily achived by chain drive as well at half the price, except it is a bit heavier, and less effcient, keeping all other parts the same. So its basically more effiecient, lighter bike thats almost double the cost.

[@geocoucool]

@@6s9hcr2 Silent too !

[@6s9hcr2]

@@geocoucool well, lets say the bicycle is not known to make much noise in the first place. But yes, you are correct.

[@geocoucool]

@@6s9hcr2 yes I agree with you

[@TimpBizkit]

@@6s9hcr2 losses on this will be a small amount of pulley friction - especially rolling around the "cam" profile in the pedals. Also string stretch hysteresis. If it takes more effort to stretch the string than they pull back. A steel cable is less stretchy, but isn't flexible enough to track round the pulleys properly. Mind you it's got 4 string segments per side supporting the load and the runs aren't hugely long.

[@Thoracius]

Question -- is circular pedaling even ideal in the first place? This drive train could easily accommodate elliptical pedaling or linear/pump pedaling, which might be nice on a recumbent where you can take advantage of the resistance of the seat back against your back.

[@warrensutthoff3744]

That's the first thing I thought is that this belongs on a recumbent

[@tonyhawk123]

The problem with linear is only one leg is doing work at any one time

[@vooyas.mp4]

lets show you a couple of strings with no explanation of how it actually works. a system that requires completely proprietary frames for it to even work wont really catch on that well

[@marioparente4108]

ISiupick wrong video

[@seniornuggtes]

ISiupick are you incapable of thinking? its really easy to see how it works

[@skywalker2837]

It works like your lawnmower starter

[@michaelshea1683]

seniornuggtes nm

[@AntonMoquin-vg1sy]

It's called a capstan drive. Friction.

[@arborinfelix]

I know what I get from a traditional bike. There are no strings attached.

[@thacrackfox]

My first thoughts at a glance is that this can't be an efficient power transfer.. I presume that in each instant when those strings see a load they will slightly elongate, resulting in energy loss. I'd like to see the numbers on energy loss between this vs conventional setup. Obviously no system is perfect. Also how does it affect performance, not just within the internal power transfer, but the pedal strokes. Like how does it feel to ride it? What muscle groups are recruited and at what point of the pedal stroke... Basically can a rider achieve the same performance across both platforms. Also how many watts can it handle before failure. Seems pretty awesome for just cruising around. Obviously innovative and functional. But if energy loss is a serious problem, it could turn even a casual joy ride into a suffer fest.

[@skywalker2837]

thacrackfox i think they could fix the elongation problem by using cables

[@luispersaud6744]

+Sky Walker I think using cables sort of diminishes what they were going for here but would definitely fix any power loss issues.

[@laharl2k]

thacrackfox not sure you but i dont see it handling 100W for many kilometers...... maybe if they had used nylon or kevlar but that string looks like a shoe lace

[@jmrstudiorecvideoproductio112]

very true...

[@cebruthius]

Moot. It's Dyneema cord.

[@LAHover]

Super cool, but kind of off how Audio stops half way through the video...

[@kenyil]

He make this revolution with much effort. If we don't want to buy it at least we can appreciate him. Not mocking him and cut his passion. Please don't mock him like you always right.

[@ericoschmitt]

Has any test with pedal power meter been done on them to compare eficiency vs a similar bike with chain drive? and why doesnt the rear wheel has normal quick release and that thing mounted on a regular flip flop fixie hub?

[@rostifardian]

Érico Schmitt I'm interested in power application too. Could you stand up and really put torque down on this bike and the "gear selection" stay in place? That's the location I see slipping. And the reason there isn't a quick release is because the gears need to stay on the frame. It behaves like a Maxle on a mountain bike.

[@ketmax2805]

Érico Schmitt they used a a thru axle so they can just drop the wheel not the whole thing because on qr skewers you have to use dropouts because the skewers can't be removed quickly from the wheel but thru axles can be removed quickly from the wheel and also they a lot stronger and stiffer than a quick release thru axles are big in the mountainbiking world and they are appearing more on road bikes.

[@ImprovingAbility]

some music and then some silence and a video I don't quite understand, but looks interesting, are there any strings attached?

[@corlfranco9371]

if its not broken why fix it?

[@riftborn1058]

Corl Franco to improve it. If we take it a bit further and move to motorcycles, a chain has quite a few flaws. A chain needs "constant" cleaning, and needs to be regulary lubed. And you have to constantly tighten it so that it doesnt jump off the sprocket. And also, if it should snap, its unlikley to run straight off, and would lock your back tire. A belt removes a lot of these issues, but is much less efficient (11% power loss, compared to 3% on the chain) pluss a belt is expensive, so its a lot more expensive to replace. The string could improve the bike, but i fail to see where

[@Adamjen]

+Riftborn Ever heard of rubber drivelines? Quite common on bikes nowadays.

[@Adamjen]

+Riftborn riiiight i just finished reading you comment. Forget what i wrote. Also, thank you for helping me find the right word for "rubber driveline", lol. Belt belt belt belt belt belt belt

[@riftborn1058]

Haha, nice :D

[@josephmorris6090]

Forget chain and belt, I prefer my shaft driven bike.

[@peterpanda7506]

How much friction can they handle?

[@elidinkhauser4275]

*Thanks KZbin! That is what i wanted to watch 2017!*

[@tomparizek1003]

youtube made you watch something?

[@carbonfiber492]

Wonder what the torque transfer is like looks great on flat but what's it like on hills

[@julius2538]

Well, how does that improve anything at all? Does it bring any advantages with it?

[@HomeDistiller]

so its an alternating ratchet drive on each side of the hub with an involute drive at the crank? any mud in the crank drive would make the motion feel horrible and the ratchet at the back would wear but no where near as fast as the string once it got full of grit, and how you slip of the pedal and crash every time it breaks under heavy load

[@mikefranz1056]

With a conventional crank, a leg generates the sinusoidal torque in downstroke only. Both legs have sinus of torque of double cadence. That means tongue changes in 0-100% its value around 50% avg. Making the propulsion phase longer than a bike has would contribute to propulsion more given the same stress on joints. So, string bike developers must juxtapose torque diagrams to make their case. Traditional chain is not that awful compared to this awkward pulley demonstration for school students.

[@tonyhawk123]

You had the opportunity to share engineering knowledge but just ended up sounding snarky. Oh well.

[@mikefranz1056]

A snarky tone prompts a check it out, and if a post is B.S. the author is the idiot with emotional problems. So you are welcome to prove me the idiot but with your engineering knowledge only without resorting to ad hominem. If you tried-&-oked, just say, "Thank you for unpaid education. Too many "wanna-be" Edison litter the Internet with their "inventions" having no real STEM education. Officially retarded (his teacher diagnosed it) Edison was a thief of intellectual property as he hired hundreds of engineers and if history repeats itself, then only as a snark."@@tonyhawk123

[@firstnamelastname7831]

Gr8...bute it will work while ☔ raining?

[@taylorbednarz2972]

Finally! I've been asking for a string powered bike for years!

[@blueckaym]

I can see a sentiment towards cyclic motion (the pedaling) which doesn't seem to be necessary (as the end of the video shows with the trike). Looks like a great concept, but how is it about: Efficiency (energy loss in string, internal spring etc.); Weight (in order to compare to conventional drive&gear systems); Longevity (ie amortization - which parts and how fast and how far they go. And how much would it cost to replace) - for example the hub's heavy duty springs, I guess they're taking the most load in form of deformation, and while designed for that I guess it does affect their life?

[@joefussy11]

Brilliant concept. Is it lighter? Can it be simpler ? Whats the comparable ratios? Is it good for mtb?

[@ThePikelg]

It looks cool but is it more efficient? Also the maintenance seem almost impossible from home... (For the string mechanism)

[@stenhouse8569]

How much torque can it handle before slipping?

[@aky1313]

Good idea as a school project, but how durable are those strings gonna be with normal use. Or when used on other than urban areas.

[@ruben-wb7bt]

Looks amazing at the end for people with unfunctional legs.

[@Qui-9]

I'm curious how the shiftting mechanism moves easily while purposefully shifting, yet stays in place at the angles it swings. It's difficult to believe the detents offer both the freedom and security about these motions, unless they are over a small margin.

[@jasonuscg]

How many cycles until the springs wear out in those spools?

[@colinbruce8800]

At least no scum bad will steal the back wheel as they won`t know what to do with it as it won`t fit anything else. ( No sprockets)

[@shithead]

+colin bruce use it on the front

[@psychoaiko666]

faceballbat well, that depends on the width, normally front hubs have a width of 100 mm and that thing looked considerably narrower. I love your nic btw

[@cadillacman8223]

they'll just cut your strings

[@allenlark]

colin bruce why couldn't he just put it on his bike?

[@netmatrix75]

The spring mechanism is something like those retractable cable management loops. You pull and it retract is you don't pull. When you pedal the pulling motion pulls the spring loaded hub and generate forward motion. The hub then retracts the string once the peak motion is achieved. I can see the benefit of having equal torque on both side of the hub. But this is not a car where there are 2 wheels at the back. The fixed non adjustable wheel pin means you must have serious design and material tolerances to get it to align correctly every time. I am thinking how much torque can those strings take? Also the super dangerous looking crank design. Seems like a lot more can be pulled inside (pants, sticks, etc) compared to a chain ring. While it is an amazing engineering feat and design, i don't think it is safe or durable enough compared to the traditional chain & sprockets.

[@PaulLorbeer]

It is very simple. If it is superior, it will survive. So, unless I didn't ride such bicycle what can I contribute to the discussion? Yes, there are a lot of parts, but maintenance could actually easy. Again, without any first hand experience, it is difficult to form a proper opinion. Moreover, there seems to be a trend towards chainless systems. And who says that the string bike can't improve. So all in all I like the idea - not for the sake of innovation. It simply is an evidence for creativity and the will to do things differently. Remember: there is no box :-)

[@skywalker2837]

gregistopal it works like your lawnmower starter, the fucking string doesn't need friction, it will fucking fling that dirt while you pedal just so you know

[@WowCreativeUsername]

Sky Walker Do you work for the company or something? Every one of your comments on this video have been you aggressively defending this impractical concept.

[@ethansloss2901]

Advantages over a conventional system?

[@OfficialHopelost9]

We're chains a problem that needed fixing?

[@dragonoidman]

Only thing I like on there is the wheel locking system....anyone know where you can find conversation bits for that?

[@RudyRydz69]

Powodzenia, będzie się przecierać. Do tego już widzę te zerwane sznurki podczas podjazdów pod wzniesienia... Mi się kilkukrotnie zdarzyło urwać łańcuch przy podjeździe...

[@dusieqq]

to jak ty jeździsz? grindujesz na najmniejszym biegu czy co?

[@HEMPoneDTS]

That looks super complex. And won't it flex pretty bad and sag after a while?

[@vardanmamikonian6364]

how does it work when its raining,dust,mud, snow in the winter?.

[@AntonMoquin-vg1sy]

Why dont you use a fully enclosed loop capstan?

[@sAINT898]

More ground clearance at the bottom bracket is an advantage. Need to figure out how to use a disc brake on the rear still.

[@Sl1z3r]

just a question... How did you solve the problem when it gets wet?

[@NicolausNemeth]

I think this should be an obvious question, but why have you not added a compound pulley to the system? That would allow higher gearing with the same force = faster speed with same effort = actual improvement over standard chain drives... or am I missing something here?

[@Kasivarsi]

Идея классная, а что произойдет с этой резинкой после попадания на нее грязи?

[@Maccaroney]

This looks like a really cool concept with some less than practical designs limitations.

[@pasttimeph]

Looks kewl can it climb?

[@MrHannatas]

The friction from the pedals on those guides would wear them out extremely fast. Especially when it gets sand and dust there.

[@KillerRaptorr]

Ball bearings. Simple. There's a ball bearing in the middle of the pedals that comes into contact with the arms, and then it spins as it pushes the arms forwards. Less friction. And the rollers are just rollers. The rear attachment holders are just there to hold the string in place, When you pedal forwards, it pulls the rear hub in the back forward, then when the string is loosen. the hubs roll/rubberband backwards and you pedal again, you pull forwards again.

[@pcblah]

There may be ball bearings, but you're still adding more rotating parts than needed. 4 extra bearings for the pedal assembly alone, then you have to worry about two ratchets (with two springs and bearings in them) and the two pulleys. Not to mention that it seems that the wheel itself needs a set of bearings and such.

[@lightdark00]

The whole question is, does the lever and pulls setup give more power to the wheels. I don't see how this could get a top speed of a big pedal gear and a small sprocket.

[@GoodVibes-qs4iu]

Its fancy. I get it. In the chain system, it WYSIWYG. Whatever power you give to the pedal gets transferred to the hub. In the string system, does it give you extra force or something due to string tension..? Just trying to think positive about this approach..!

[@PHEARVII]

What's the benefits of this compared to chain driven bikes? The only thing I can think of is reduced weight.

[@kempflar]

Interesting design . But i don't think it would withstand the forces generated going uphill or on a sprint. Also, someone could cut the string. Can not be replaced with some kind of steel wire?

[@skyonahseditsmusic6360]

Need any testers for the rugged down hill versions? I will document everything.

[@dusieqq]

few questions to ask: did you measured how much power legs can generate with yours system, compared to 10x2 road bike? how does the strings act if under heavy rainfall? do you plan on making road bike opt? I know there is carbon TT bike but that's not what im looking after.

[@vitoruffalo2576]

A complete link to click would be nice

[@jasonstokes361]

Looks to be a centrifugal clutch hub mechanism that would enable the rocking pull motion at a guess...

[@bricology]

Finally! -the perfect solution to a problem that didn't exist! But seriously: it's interesting to see how they overcame some of the developmental challenges, and the engineer in me appreciates it. I am no fan of derailleurs, and this obviates most of their shortcomings, but it brings shortcomings of its own. A chain-drive is the most efficient and straightforward mechanism for transferring power yet invented; that's why it's used in all manner of industrial applications. Properly set-up, one can expect a 92-97% efficiency with a chain-drive and derailleur (a "fixed" chain would be more like 99% efficient, since the chainline is straight and there's no flex from the rear derailleur). A Gates kevlar belt drive would come in a close second. _This_ system would be _way_ down the list. (And getting rid of derailleurs is also possible using an internally-geared hub, or even better, a Schlumpf drive.) A lot of energy would be absorbed by the "strings" stretching under load, and by the various mechanical linkages. Another issue is that with a normal chainring and chain-drive, the movement of the legs and feet are "linked" to the cyclical motion of the cranks and therefore the rider's own legs act as a sort of flywheel for continuous and even mechanical power; this unit ,with its reciprocating action, breaks that energy into moments (or "impulses"), which again, lowers efficiency. My guess is that this form of drive would produce something around 80% efficiency. That may not sound like a lot less than the minimum of 92% efficiency from a derailleur system, but it is. Others have mentioned the risk of "string" breakage or even being cut, but to me, the bigger issue is that in order to get positive drive with the string, it requires multiple wraps around the hub. So it appears to be simply driving by friction of the string in the grooves on the hub. OK, what happens when it gets wet, or oily? How much "stiction" remains? I'd be curious to know what the total weight is of a bike set up like this, compared to its equivalent with a chain-drive. Interestingly, nowhere on the website does it say what the *bikes* weigh, just what the frames weigh. My guess: assembled they weigh 7-8 pounds more than their equivalents. And finally, the added complexity means more things to go wrong, and more things that can't be owner-repaired or handled by bike shops, much less a supply of aftermarket/3rd-party parts.

[@Ironejo]

How long can be used? Or the maximum speed compared with chains, I was thinking what about in triathlon bikes or tasting in a competition. If you're interested I can test it for you.

[@michaelmeisman4731]

After reading many, too many, of those complaining all I want to say is WELL DONE! This is not ever going to be a replacement of the time tested bicycle we already have and love. But this is engineering at its best. Not that the end result is the best solution. But it is someone working outside the box and that is just not taught or encouraged in most of today's academia. However I have my engineering brain working over board on other places where this ingenious little device could truly be put to great use vastly improving its performance. Well done my friend, well done.

[@brandontw01]

I wonder if it would be too complicated and expensive to make the string a jacketed cable instead.

[@aldoruiz2465]

What do you do if the string gets tangeled in the middle of a bike ride?

[@Brian-uj6gm]

Dope concept idea and model. Only thing I'd be worried about is someone cutting he strings or the strings getting torn.

[@1neAdam12]

Wait, so the bike is making that music with its strings?

[@fiksiu6645]

Question is how many wats this safe or lose campare with normal chain

[@cooljacob3216]

I wonder if it can handle the torque and power from a racer.

[@vaughandsouza5309]

I want one , it's looks super cool 😍

[@MC-vv3uc]

Wait what was so wrong about the bikes we already have?

[@VTis996]

so this is some sort like CVT for bike ?

[@aznnubbyboy]

It's a pretty cool concept. With all the blabbering about rules of engagement yadda yadda. I think that a true engineer would appreciate the idea and thought put into this bike. Although it may not be as durable as a conventional chain bike, it's cool to see odd things being done.

[@aculasabacca]

The three wheeler looks like a back ache. What is the point?

[@asifhaque6108]

You have to cover those strings with some protective case. Otherwise some has been cut or burn those strings

[@KillerRaptorr]

cut or burn? That's like saying same thing to do to your chain or belt. Anyone could break your chain off your bike easy with a chain break tool. But do people do it? no. They want the bike in whole or leave it. Common sense goes along way bud.

[@MettleMadness]

KillerRaptorr People stealing just someone's wheels is more common than you think. I had a friend who had both of the wheels on his bike stolen when the frame was chained up well.

[@charlotteice5704]

I think this needs much refinement. The problems I see with it are that special frames are needed, the mechanism is exposed (would catch mud easily, strings could be cut) and the strings might not be able withstand the power of a strong cyclist (or motor). I don't know if you can adjust which pedal pops up (I would like the right and not the left one to pop up) and if you have MTB (or maybe BMX too) pedals they might hurt your shin when they pop up. The mechanism is pretty innovative and unique though.

[@Madogen]

I love this. Why? People need to question why we design and engineer things in a certain way, look for new innovative ideas. These ideas lead to advancement, either directly or by leading to creative thinking in others. This is a whole new way of thinking, and it works. Why are people trying to crush creative thinking? Did you think the rotary engine was a complete waste? Perhaps diesel electric should have been left as steam? Why even bother with diesel cars when you have petrol? Come on guys (and gals) what is the point in belittling the designers. I do agree that the music issue should be sorted out though.

[@williamtsanders]

very flexible metal rope instead of string?

[@wladpolyanzew6141]

Interesting! I would like to try it out. Now I'm curios about efficiency reserch and compraring it to a chain or a belt.

[@62shalaka]

Impracticality taken to levels unseen in bicycling history. Congratulations.

[@Gallardo6669]

what incredible ideas humans can have.my respect!

[@mageshkongu]

I am happy to see your alternative thinking

[@SuperCornjulio]

Inclined or rugged terrain. Can the rope handle the tensile strength required? A big NO.

[@shacoclone3299]

I don't see any significant advantages, but I really like the concept and I think it is a really cool and interesting product.

[@abmaximus]

The music stops halfway through. Does the bike?

[@JanosPannonius]

No, it shows how silent the bike is... No permanent clicking from the ratchet, no vibration from the chain path, etc... That's why it is so smooth... :-)

[@jj95east]

Is this the new dura ace?

[@2dogslide]

Is it power efficent? Looks like lots of power losses D:

[@dave_6391]

No, it is way to over complicated, and the bike frame has to be re-designed and it is just not worth it. We already have belts and chains that are tried and tru. this is useless.

[@LaszloPalfi]

+Dave _ Spring Drive is far more simple and more convinient than chain drive and gear shift mechanism ;-) Spring Drive - consits of less parts and more simple then chain drive as there is NO shifting mechanism on the back wheel, - offers the possibility of shifting while STANDING or while driving UPHILL - is cleaner because it uses NO grease on the outside, - offers smooth driving as there is NO micro vibration caused by the links, - offers immediate starting without the need of turning the pedal into horizontal position, because it automatically repositions the pedal into horizontal position when you take off your foot

[@dave_6391]

yea no l'll stay with the tried and true No rear derailleur because it has been moved up to the peddle sections. so there is a shifting mech. Now lets count the parts needed for your shifting. There is the special addition of the peddles. Then there is the gear mech on the peddles on both sides not just 1. Then there is the rear mech that the string attaches to not to mention the internal spring on both sides. so instead of 1 hub you have 2 on 1 wheel. By my count you ave already passed a rear derailleur bike in the amount of parts simply because you have to have double of everything on both sides to make this work moving a peddle to your comfortable starting position is not an issue. To pass that off as a benefit is senseless as my starting position is different compared to where someone else would like their peddle to start off at. Then you have the string Strings fail more than a chain or belt. So again I will pass This is over complicating things for no real benefit. To redesign something like the drivetrain of a bicycle you have to provide a benefit. This does not do such. It is just over complicating it.

[@DJ-xr5wb]

László Pálfi but it costs more, like trying to sell ice to Eskimos

[@truints]

It's not pinned dumbass. It's looped through. How does it being connected have anything to do with reliability?

[@truints]

Where? Bitch, where? Where did I bitch about slipping? If you are referring to the string getting wet. You need to go back to school little kiddy boy. Did you know that when clothe materials get wet they soak up water and the properties change? You should do some research you dunce.

[@chrispariseau3935]

wow a bike that you have to peddle.... and its more complex and expansive then a traditional one....now that innovation.

[@binkiemcfartnuggets7803]

When I see a bicycle, I think of the flapjack episode. "Bicycle! Bi meaning 2, cycle meaning 2!"

[@crazylarryjr]

cool concept, and even adaptable for handicapped riders, where conventional setups are not

[@danielwarner7734]

Interesting mechanism but what's the point? I don't see any advantage. Weight of the chain is negated by all the other additional required parts. If anything it seems to be less energy efficient.

[@leeknivek]

Will it store energy or is it just an alternate drive? Because as an alternate drive, not very impressive.

[@kirilcavdarov965]

Why convert rotary motion to reciprocating and back to rotary? Was this just some exercise for a university? What about dirt grit and lack of owner care and understanding? Thanks for showing it and maybe consider designing a better shaft drive bike.

[@guille21g_]

What is your goal with this system? And I'm not being sarcastic or asking to make fun or to bother. I really want to know in what was you thinking when you made that system? Apart from a more efficient transmission than the chain.

[@RukaSubCh]

Interesting, so a ratchet with a return spring to turn the wheel using Paracord , using 2 to make a complete cycling action with power strokes for each downward thrust . There maybe a better application to this then a bicycle, many an active wheelchair but even in that application there are already electric wheelchairs.

[@geo33t]

Durability and mud?

[@locouk]

Why reinvent the wheel?

[@lionsmusic004]

does someone know if this one is faster than traditional bikes? I've heard that in other video

[@illfox240sx6]

I am a down hill mountain biker, what would be the benefit of this for me?

[@Maximilian-Willert]

Absolutely nothing, this is meant for smooth terrain, not so much for high speed bumps and jumps.

[@illfox240sx6]

so why do they say its the biggest revolution in bikes when it doesn't even apply to all forms of riding

[@Maximilian-Willert]

illFox 240sx My guess is that we live in a world where advertisement is no longer about truth or transparency, maybe it never even has been... ;) The reason why I believe that this is nothing for you, is becuase they do not sell any form of mountain or downhill bike on their webshop. I highly suggest you stick with what you currently have and enjoy. ;)

[@charlessherlock3204]

well it looks like the idea of beautiful, however where is rest of it. pull from the top and remember the leg.the leg is a human thing and what actually the length?

[@nakedsphynxlake]

I do like this idea and the trike is really cool .

[@AKSnowLeopard]

but, why? What advantage does this bring to cycling other than being bew