Bike Flaw's You Can't Avoid!!

[@cheuklau6828]

As a perfectionist, this was driving me nuts. Thanks for giving me some peace of mind.

[@jeramimachado383]

I'm the same way I can feel the minuscule difference in alignments.

[@JanoBanano1996]

the longer you ride, the less you gonna care. my wheels are somewhat untrue, my chain's as loose as it can get (for kickflips) and the frame has dents everywhere. It's BMX.

[@JanoBanano1996]

@FPS hector what’s with them? They run overpriced machined titan stuff and even these parts won’t be a 100% true.

[@joshdennington7413]

This video literally saved my struggle with my high and low chain tension for years and now I’ve finally figured it out thanks for a great video

[@netrunner2049]

On those entry level bikes the cheap chains stretch really fast, and sprockets wear out, or even bend. I upgraded my chain to a 710 and replaced the sprocket, on kink gap and this tight/loose issue went away.

[@randall3786]

Once you understand them they are so simple but phu always finds a way to help us understand even more about the BMX bike. And we all thank him for that.

[@joninfiction]

I’ve been missing too many videos. I started a new job and it’s been taking up all my free time. I’ll miss a bunch, but I’m gonna go through the catalogue for sure! Always love the knowledge videos!

[@reviewyourownadventure2083]

Also, the sprocket boss bolt has to be lined up evenly. I have Profile cranks and a Profile sprocket and it's possible to tighten the sprocket down a tiny bit off center. The placement of the sprocket boss bolt matters. On top of that, the crank spindle spacer is important also. I once had a bike that pedaled just fine for quite some time and then developed this tight- loose issue. The bottom bracket bearings were warped because I didn't put the spindle spacer in between the bearings. Swapped out the bearings for a new set and put the spacer inside the bottom bracket and the problem went away.

[@Troubledboy88]

Great video Phu, I bought a Primer from a kid a few months back, he had the cranks misaligned. So no matter how much I adjusted the wheel and sprocket nut. It wouldn’t get better. I took apart cranks yesterday, greased them, took out one spacer, and now everything feels really good, it is pretty consistent now and it feels so smooth. I think my chain was off kilter a bit. Also bought a cnc sprocket.

[@StreetDreamzTT]

I just get the chain snug at the tight spot and never had a prob.

[@Jordan-yf1nx]

Asking for a friend. Could you do a “what the Foo” episode weight weenies edition? Listing bmx parts from heaviest to lightest, with likeliness of breaking in hard use on a scale of 1-10.

[@ryantorrisi2290]

Thank you Phu! You answered the question I was afraid to ask. I have a brand new Subrosa Malum DDT 26in. I noticed this the second day when I adjusted the chain and was like WTF. Love the content. Keep up the great videos that teach everyone so much in a fun and professional down to earth way.

[@mitchmothemag2835]

Spread the knowledge Phu. Love the vids. Keep up the good work.

[@FascinatinqHD]

I literally got a brand new bike about 2 months ago and I've had this issue since I received it. I tried everything so I just left it a bit loose thx for this video!

[@majun26]

Phu is not lying, this problem is present on most, if not all, OEM complete bikes, and it's possible on any bike. While I would consider it "within acceptable tolerances" for a cheap bike, I think that the bicycle industry, ironically, is not actually very good at mass producing round objects, and I don't only mean stamped steel BMX sprockets. I have an OEM bike that's decently high-end, and for the life of me I can't tune the uneven chain tension out of it (without replacing parts). It was perfect when I bought it, but at one point I ran the chain too tight and it deformed the sprocket or maybe the driver, so in that case it's my fault. Eventually I'll replace the sprocket and hopefully that'll even things back out. I also just built a fully aftermarket bike a few days ago and, while I've only ridden it once or twice around the block so far, I am relieved that so far this problem is not present on that bike, and I wouldn't be happy if it was for the money I paid. I think the bicycle industry needs to come to terms with mass producing round things, and I don't think this should be a problem on even OEM bikes above around 600 bucks, but what I think is at odds with the reality of the bicycle industry there. Anyway, in most cases, assuming proper assembly, the culprit is going to be the sprocket, so if you can't tune out uneven chain tension, just get a high quality sprocket and it should effectively solve the problem. If you have this problem on a brand new bike over around 600 bucks, I'd ask the bike shop do their best to get the chain tension even for you before you replace any parts. At that price, I'd consider a perceptibly egg-shaped sprocket to be a manufacturing defect, but I'm not a bike company, and you might have to buy a sprocket on your own. The thing is, even chain tension is possible. It's not worth worrying about on a cheap bike, and its arguably not worth worrying about on any bike you're going to take out and smash into handrails and concrete ledges, but its definitely something that can be achieved on a bicycle. Anyway, even tension or not, never run your chain too tight like I did, it mangles every other part of your drivetrain, fast and hard. Once that happens, even tension is impossible, and anyway its the least of your problems at that point. Actually its the least of your problems at any point, which is what this video is saying, and also the reason I haven't replace the sprocket on my OEM bike yet, but I can understand why people are anal about bikes if they're more expensive, the parts should be rounder than the cheap bike, otherwise what's the point of the bicycle industry?

[@Kc_ua6]

"Just get on your bike and go shread" 💯 I've literally rode home 30 mins away with 15 spokes after trying to learn whips. Didn't stop me tho. Be safe and keep riding👌

[@MaximRecoil]

With older bikes that used a freewheel, it was the freewheel that was the biggest offender with regard to being out of round. You could tell it was the freewheel because if you just spun the rear wheel while keeping the cranks stationary you could see the chain getting tighter and looser, and you could see the freewheel's sprocket moving around slightly, which is what was causing the chain to get tighter and looser. I don't have any experience with newer bikes that use a freehub, but it wouldn't surprise me if those did the same thing, since a freehub uses the same mechanism as a freewheel (simple ratchet mechanism, fundamentally the same thing that's inside a ratchet wrench). As for free coaster hubs, I have no idea about those, but regardless of the type of drive mechanism you have, it's easy enough to test. Just flip your bike upside down and give the rear wheel a spin, making sure your cranks stay stationary (which removes the front sprocket from the equation). If you see any motion in your chain and rear sprocket at all while your rear wheel is spinning then your rear sprocket is out of round.

[@randycollins2607]

Worked at my local shop today. I cleaned a freecoaster. Miss working on bikes.

[@AlfredoMancuso]

🤛🏼💯

[@SilverPony44]

So glad phu is around this dude helps me with so much stuff and probably doesn’t even know it thanks man!!!

[@BensEdits]

I just run my chain a little looser if there is a tight spot just so I don’t put so much tension on the chain.

[@jaden3393]

Make a video about fork angles. I never understood the oddyseys 32 and 30s and whats the differences really in riding.

[@Fixingeverthingwithaengine567]

I worked in a machine shop making parts like that for golden and pride mobility. Stamp press,sheet press,and hole punch press.

[@craigparker9]

All this info and these episodes contain priceless knowledge and entertainment. Im enjoying my bmx education - Thanks Phu Thanks Alf. Any words on why new chain creating crackling chicken bones noise on my driver/ sprocket. Any solutions ?

[@ReAcH007]

thanks so much i’ve bought new chains and sprockets finally figured it out!

[@kirkthompson8207]

When you were measuring the sprocket the caliper was not in the same spot on the tool when measuring. That's where the 21 came from and at the end you had a 25. Tip vs shaft.

[@ytelpeloncito5151]

Phu we need a sticker of you like the thumbnail!

[@MorbidThrasher666]

1 more thing u can do also to ease that tight spot,if u loosen the bolt on the crank that holds the sprocket and shift it around it will get rid of the hard spots also

[@Russellslayer666]

As a machinist that works on valves not every part is going to be perfectly round, its gonna have high and low spots but they have a tolerance so I can understand on how sprockets are made..Great video

[@Bob42047bmx]

Lol, what up Rosario! You been watching Electronical ? I seen your profile pic in the comments & was like, I know that guy from somewhere..

[@Russellslayer666]

@@Bob42047bmx i been so busy with work i havent have the chance to watch it,gonna try to watch it tomorrow or the weekend

[@mathieusynnott8915]

Alfredo can you please make a video on the pressed hub profile sprocket?

[@yosifsantiago637]

Got an Odyssey sprocket and its perfect lol

[@estabanb55]

I know one day back in the 80s I bought some Redline three-piece cranks but they didn't fit my GT power disc🤔

[@galacticresidue9596]

Nice to put people at ease however you should have mentioned a sort of fix. Like loosening the chain some to make the tight spot less noticeable. Thanks for the video!

[@hernesto4347]

This info should blow up in the BMX community

[@Kimurizzy]

Dude I remember this used to bug me back in the day. Then Phu gave me the exact same explanation haha.

[@chakoigoreng]

How about high-end stoked bike like Kink William or Wethepeople envy. It is have a same problem I'm curious. Phu explain to me.

[@AlfredoMancuso]

Not as bad since the sprocket is CNC and not stamped

[@chakoigoreng]

@@AlfredoMancusoYeah, i get it. Thank for your reply. I guess Phu is Scientist of BMX, but he talk like what ever and blah blah blah.

[@manuelchavez3431]

I like your passion for bikes ,you do what you love.pretty good info to keep in mind when working on them

[@Immvnvvl]

How do you tighten ur wheel correctly? My backwheel is loose and I can’t tighten it for some reason need help ASAP Great vid though

[@MerchantOfDeath15]

check the cone nuts on your hub to start, if they are loose the wheel can have side to side play. Thats the only thing I can think of but thats your best place to start. Take it off the bike and check the driver out, give it a spin, try and move the axle around, and check the hardware out like nuts. If you arent a gorilla about it, you can also take apart the hub and clean it out...But only as a last resort, my cassette is like 6 years old and i havent had to take it apart. Best of luck.

[@cfmechanic]

Not boring phu alf is just numb to the shenanigans. Great vid as always. Nice to see epic vid on Wednesday feel lucky.

[@norwin2791]

Master Kung Phu of bmx

[@AlfredoMancuso]

👑

[@T4Eater]

Isn't the problem exacerbated with a 25t vs the 16t/44t standard?? With a 44t you can run the chain a little more loose without the chain hitting the frame which gives you a a bigger buffer preventing tight spots. First difference I noticed with 9/25 vs race bike 16/44

[@skyelee9398]

I’m other words you get what you pay. No whining 🤙

[@Younghead]

All of the reasons he said have nothing to do with it. The chain will sometimes stretch a bit, but it does some times depend on how you set the chain up, it will happen on all bikes. Just live with it.

[@mrhurrycane8037]

i have an aftermarket everything and the tight loose problem just makes it un-rideable

[@jeremiefitzpatrick9722]

Phu knows his bike stuff and is on his game!👊🏻💜🙂

[@fordbluegage2968]

I could use some assistance How do I choose the correct forks for my bike ? ...I have a ssquared xxxl bmx frame I'm building ...not for racing or tricks ....I just ride 15-20 miles through my city in one ride ... currently I have chrome landing gear forks on it but I dont like the way they look (out of place) I usually ride my mx24 or staats racing bike but I want to start riding this bike too ..any assistance would be appreciated thanks in advance 👍

[@TheDwightMamba]

Where the axle mounts are on the fork is measured in millimeters. Closer to the fork gets quicker reaction. Farther away gives stability.

[@FirstLast-nt5ui]

fixed gears it is also pronounced, tighten chain on a tight spot not on a loose and it corrects the issue. crank arms point out the tight spots when locating new rings. if they made chain ring billets on a lathe they could make them more precise, slicing each ring off the billet... lathe is more accurate than cnc for spun objects.. cnc lathe, hmmm 🚴‍♀️

[@ProfKaos-yf8oq]

you don't need a perfect bike to have a perfect time :D Thanks for the info Phu!

[@adyzanahmad8565]

I'm just owned kink switch 2022 for a week... Open a boxes and it's 90% essembled... Rear wheel already essembled... Try to hit the crank and it happens like in this video... So let it be just like that after saw this video... Lol...

[@v4skunk739]

Always go for cnc machined parts. No to forgings and stamped parts.

[@TroyG1990]

Glad you gave real tech tips, most bike shops would just charge for a sprocket you don't need. I was always curious about that topic. FOOk yeA!!

[@tonysheene6399]

Good advice

[@fallenhobbit6554]

you could always use a caliper and a dremel and smooth out the bad spots if you are that ocd.

[@trippymctripster2405]

Stoked Every Video!

[@AlfredoMancuso]

🙏🏻🙏🏻

[@lazylocks5414]

in 40+ years working on bikes I have never seen a bike without this issue. My biggest pet peeve is when the front sprocket and rear cog/freewheel/coaster does not line up on a single gear bike. The 2021 SE Big rippers are off by almost 10 milometers. There is no excuse for that.

[@karl11]

I have the same problem that's why i can't use sprocket more than 25t.

[@mrvapor4791]

That's why my 26 has 135mm rear spacing with a SS MTB hub with an adjustable chain line.

[@karl11]

Im riding a bmx. But i wanted to use bigger than 25t. The problem is it will touch the chain stay. If i put more spacer, it'll be too much off set which isn't good for driver, chain and sprocket.

[@Softballcrazy]

Try not to skimp on the rotating parts. What ive learned by working on my own bikes.

[@-j-k-92]

For Phu and the ALGO

[@HillbillyOcean]

He's just the best

[@eelson2]

BMX we break stuff. Love these vids

[@claytonkirby878]

Don't know what too say .but good too know what's normal and what's wrong ..keep shredding

[@richardhuerta4401]

What's your take on spline drive compared to what you were just explaining here?

[@netrunner2049]

IMHO prefer spline drive. With bolt drive over time the sprocket bends, maybe because of the crank pressure. Maybe if you have a really sturdy sprocket, like 7075 aluminum it won't bend. But spline drive just avoids that issue.

[@pauljames1978]

Sprockets are not totally round, spline drive sprockets are, bolt on sprocket are oval ive bin told, this is why you get a tight spot in your chain

[@pauljames1978]

11:17 On a mountain bike back cassette it oscillates on the cheep ones

[@mathieusynnott8915]

Profile saber splines drive with pressed in 19mm smooth reducer is terrible.

[@kimoarmstrong3519]

Phu should market an eccentric hat washer to minimize run out.

[@AlfredoMancuso]

That’s a good idea

[@mikehagen3785]

Profile cranks with a spline drive sprocket gets rid of 98% of this. Phu is correct tho, Nothing is made perfectly, even high end parts will have some sort of run out, or out of round to them.

[@solomanholliday8485]

What tires are those on that kink?

[@AlfredoMancuso]

Kink Sever Tires

[@solomanholliday8485]

Gon pick me up a pair, blew thru mine trying to learn 360s

[@AlfredoMancuso]

They’re solid!

[@karl11]

It will definitely get damaged if you fit it super tight. Just put a little slack for the imperfection to play...

[@SLZYPZY]

Glad the goal got hit!

[@Alejandrolopez-sr9ze]

Let you know I lot a read ur communication with caption because will forward my bike 1999 GT for project the future …

[@justsomeguy404]

Only thing I have issues with is dialing in my gyro & back brake.

[@TheDwightMamba]

So many adjustments to make!

[@MrNamaikisaru]

200 baby! There’s nothing wrong with striving for perfection in a drivetrain but yeah it’s a bmx not a rolls Royce.

[@BerserkerNick]

Get Phu to put lotion on his skin for Buffalo Bill... Back in the midschool days Nirve sprockets were always off a little off, bought a Haro Nyquist frame in '03 that wasn't fully welded where the seatstays and seattube met so I had to weld it

[@wesleynaumann1410]

Love. The. Vidio. Man. Your the. Best.

[@MiguelAguilar-ce1tf]

Still can’t ride Bc my cranks 🤦‍♂️😩

[@AlfredoMancuso]

😕

[@dakotapinson3478]

Where is y’all’s shop located?

[@robertlund5694]

Type 'epic ride shop' into google

[@hectorn.6137]

If it's cnc'd, I think it's safe to say it's perfectly round. No? I mean, isn't that the point? You take the human error out of it. ??

[@AlfredoMancuso]

It’s definitely better than stamped, but the point of the video is that there are a lot of variables

[@hectorn.6137]

@@AlfredoMancuso no me grites.

[@Mic420m]

Thanks Fu. Rebuilding old bikes I kept thinking I was doing something wrong. Now I know it was the Factory f-ing Up in the name of mass production. Hey, the more the merrier, right. Don't forget though, we, the blighted masses, will have to endure that motormouth boor at the park/race who goes on and on about each of his multi-thousand dollar parts that are perfect... Blah blah blah blah.

[@jondough2972]

It also has to do with getting the same amount of links on each side of yhe sprocket,

[@saifulhaq8556]

hi i am from malaysia. I really like your channel

[@AlfredoMancuso]

💜

[@owen687]

Back at it again!

[@owen687]

How’d I know it was the drive train

[@randycollins2607]

It's important to know. I went to my local bike shop and help them fix a free concert because he's never worked on one. Guess where I got the information from.

[@AlfredoMancuso]

Legendary status!

[@AlfredoMancuso]

You know your stuff

[@AlfredoMancuso]

Damn daniel!

[@cfmechanic]

Where's part 2

[@AlfredoMancuso]

kzbin.info/www/bejne/Y2axlodoed2fZpI

[@yeseniamacias662]

you must get alot of people that want perfect I get that too

[@AlfredoMancuso]

Yes haha

[@orangecrush50]

I have those tires on my bike

[@AlfredoMancuso]

Good choice

[@orangecrush50]

@@AlfredoMancuso I appreciate that you reply to the fans 👍🏽

[@AlfredoMancuso]

@@orangecrush50 of course man!

[@dennisd4452]

as long as I don't have a flat, I can live with a working tight chain. Tight chains 4 LIFE!

[@ethandenis5650]

If it doesn't kickflip an ungodly amount off one slight kick I don't want it

[@robertlund5694]

Tight chains stress everything and cause nasty noises.

[@JanoBanano1996]

why having a tight chain when you can do kickflips with a loose one?

[@Jacob-ze6ck]

Nice

[@AlfredoMancuso]

🤛🏼

[@howardgillingham4763]

Is called geometric demension and tolerances

[@knottyed5259]

Luv u alf

[@RAXtheGREAT]

ethan is always good in NY YURRRRRRR lol

[@AlfredoMancuso]

Ya Heeeeeaaarrrddddd

[@TR.Pixels]

Phu making some bad bets with comment numbers haha

[@AlfredoMancuso]

Oh he learned his lesson in tomorrow’s video 😂

[@BensEdits]

Big up buffalo bill

[@brianrobison749]

From working on my bikes i noticed the biggest thing contributing to the tight/loose thing is a stripped sprocket bolt, if it tightens the sprocket down and the screw isnt perfectly straight the screw pushes the sprocket to an angle and depending on where the angle is during rotation it gets tighter or looser.

[@brianrobison749]

Ive replaced the chain and both rear and back sprockets and the tight/looseness was pretty much the exact same which makes me believe the angle of the bolt is a big contributing factor.

[@brianrobison749]

And i bet a lotta cranks sprocket bolt is already at a slight angle outta the factory.

[@devilmyke]

Everyone look out for tight loose.

[@AlfredoMancuso]

😅😅

[@xSF5150x]

Right!!!

[@xSF5150x]

Sometimes it tight, sometimes it’s loose, just like many things in life boyz. 😆

[@nizarlutfi5981]

When u yawning… phu heart’s just collapse😹

[@xSF5150x]

😂😝😴

[@nikolapaspalj4954]

guys!

[@xdKAYf0lcflhDi7mfXRFkw]

I love NY? Dang.. Only a tourist would wear that sh111rt. LOL

[@solomanholliday8485]

Let's goooo

[@AlfredoMancuso]

🙏🏻🙏🏻

[@Bimmer35]

Woah woah bro, what's wrong with NY?!

[@mattk8810]

It being a cheaper model doesn’t mean people should be getting unrideable bikes. Bad quality control by the brand Great video though!

[@AlfredoMancuso]

💯🙏🏻

[@bmxscape]

nothing about those bikes is "unridable". there is no bad quality control by the brand

[@Cypher81]

But you know what. 🤭 First

[@Jacob-ze6ck]

Another video

[@AlfredoMancuso]

💯

[@hohohaha999]

All the Taiwanese factory owners getting their extortion payments ready

[@MiguelAguilar-ce1tf]

First

[@AlfredoMancuso]

Yeeee