Agreed! Btw, not sure if you heard about it but you should consider getting an nta helmet like xnito or bern hudson if you have a cpsc helmet. Cpsc is not that safe
I am from Russia. I'm in the kitchen cooking dinner and watching your video. And believe me with the Park Tool not only turns out all right with the bikes, but also the mood and cooking too! )))
Excellent video instructions!! Adressing other problems too by refering to other videos... I was lucky enough!! Didn't even have to remove the wheel!! Loosened the holding screws, pressed the brake to center caliper, tightened screws and done!! Thanks a lot guys.
I’ve found that after loosening the callipers and pressing the break, if u tighten each bolt quarter turn at a time alternating as you tighten (top bolt,bottom bolt,top bolt etc) , it works well
Everytime I tighten my bolts my caliper moves making it hard to do. So I have to compensate knowing the caliper is going to move a millimeter or so. Tightening the bolts twist the washer and move it to the side if you know what I mean
I've found on so many occasions that having the rider sit on the bike and pull the brake lever while the calliper mount bolts are slacked off really helps fitting. The frame seems to distort and that moves when there isn't any weight on it, alignment that's achieved is thrown out when the rider gets back on. Hard to achieve yourself but when you do it a couple times you manage sitting on the seat to give weight and weight align the calliper.
You can easily get rid of a hard to adjust rub by sliding a business card between the smallest pad gap and the rotor. Lightly pull the brake lever while tightening the bolts.
Thanks so much for this video..I just recently got a new bike with hydraulic disc on it and I've been a little nervous about trying to adjust my breaks but didn't want to do it wrong and messing up my new bike
This video is a godsent. Had the problem today, and this video was super helpful. Short, straight to the point, well explained, great production value on the video, links to a lot of other videos on this channel. Just great overall. Thanks a lot, very much appreciated
Make sure the break hose is not putting too much side force on the caliper when it is screwed loose when you are about to adjust it by breaking and letting it adjust itself on the disc and tighten. My break hose put way toomuch side force on the caliper so it would rub against the disc anyway until I unsecured a zip-tie to loosen the break hose from the frame of the bike itself.
I bought a brand new mountain bike online, besides other things wrong with it the alignment was not set correctly, but the seller was so unhelpful I returned it. But now I know what I'm looking for, I might just adjust my ebike side pull caliper brakes and save myself a few quid.
I am possibly the least mechanically inclined person in the Western Hemisphere and yet this video helped me fix my annoying disc rub problem in under 3 minutes. Thanks so much!
Take a paper business card, bend it by half, and put it between braking pads. Loosen the caliper bolts and secure the wheel. The rotor must go between the paper "walls" of your business card. Then press the brakes firmly / ask someone to hold and then tighten the bolts on the brake caliper. Remove the business card. You are done!
I work part time at a bike shop due to my passion for all things bike. I work mainly in sales, I own 2 bikes and a 3rd on order. These videos help me to maintain my own bikes and speak more intelligently to customers who are thinking about buying a bike. The production quality is fantastic, the graphics sometimes used is super helpful. Thank you Park Tools.
It might be too meticulous, but even after eliminating any rub, I like to slowly engage the brake and see if it pushes the rotor to one side. I then crack the bolts lose enough to slightly move the caliper, adjust, and check again. Less rotor flex, less heat.
I loosened 2 screws on my mountain bike Avid caliper and voila, the jammed disc was immediately freed. Next moment I realized the brake lever was totally loosened, and the brake fluid started to flow out from the caliper!
soy su fan, he estado siguiendo sus videos durante mucho tiempo y me he suscrito a sus videos. En sus videos, obtuve mucha inspiración, pero tengo algunas ideas nuevas, podemos comunicarse entre sí Discutir, por favor respóndame
When i have pressed the brakes and tightened the caliper down there is no rubbing, but what i am seeing is that the disc is getting pushed more from one side, So the disc is curving which cant be good, Going to have a look today.
A little flex does no harm. In fact, most mechanical brakes are designed to do this. In theory, both hydraulic pistons should extend the same, but in reality, one piston might sit a bit closer to the rotor, yet there is no rubbing.
i feel dumb for not thinking of just squeezing the brake to get the calipers aligned. Sometimes you just need someone telling you how to do something for it to "click"
Honestly guys, keep doing this invaluable videos and keep manufacturing in the US and not overseas, and I'll keep spending quite a few bucks on your tools ! These are so crystal clear and well produced, it's almost as if we should pay for watching this (not giving you any bad idea...)
If the disc is aligned in the centre but when you pull the brake the rotor moves to the side,will this eventually warp the rotor? ...I think it does in my experience
What could cause my front caliper(fox 38 kabolt x) to loose alignment after every ride on my 2021 giant reign. Including a 30min ride on pavement. Things I've done 1. Torqued every bolt to spec including axle and pinch bolt. 2.trued rotor to acceptable tolerance 3.balanced pistons 4. Meticulously aligned caliper and applied Loctite and torqued to spec.. no rub 30 min test ride on pavent Couple small drops and stops= caliper off center
If you remove the caliper what does the face of the mounting surface look like on the fork? It could be slightly deformed or have paint on them allowing the caliper to move or return to a place it has already been. If thats the case facing with the DT-5.2 could be the solution. Also keep in mind the hub could be causing rubbing but if the bolts are loose im guessing more along the lines of facing the disc brake mount.
@@parktool thankk you for the quick response much appreciated. Il have a look at the mounting surface. One thing I have noticed and is much more prevalent on the rear is if I grab the wheel and push sideways, the frame/fork/hub flexes enough that my 203mm rotors move around by atleast 1-2mm, I can get them to touch the pads on both sides. Is doesn't appear to be play in the bearing(cartrige) just flex
Check out our brake bleeding videos. We have them for many brands. You will want to solve your leak before bleeding. There should be no way for the system to leak if everything is working properly.
Another excellent Park Tool video. Thanks for the continuing support for we mere mortals of the cycling maintenance world, the information is invaluable.
thank you guys so much. just got a gorgeous new bike today and had to take off the quick releases to get it home. Once I got.back home it rubbed like a mfer and I was not in a good mood. Appreciate the vid
In every video I watch people use some sort of repair stand and it makes everything look easy. Well, I don't have one of those so I have to turn the bike upside down, which makes it a lot harder to be honest (my brake had a leakage on the brake lever when I pushed the pistons back probably because it was upside down). What do I do? Any suggestions other than buying a repair stand?
I have the same problem, my bike would never fit on any type of stand so I have to flip it over upside down to work on it. You can see what the bike looks like on my channel
You can’t always rely on the pistons to align the caliper properly, so make sure your pistons are extending relatively evenly. If not, clean them and start over. Otherwise you’ll hit the trail and your brakes will get out of whack quickly
Thank you i will sticking with rim brakes going to cancel my idea of buying the new Trek emonda and get a giant tcr instead. Disc brakes are just too much Grief
So true dude, watching all these maintenance tips and comments about disc brakes stresses me a lot. I will be sticking with my rim brakes for as long as I could.
As usual, Park Tool is my go-to resource on RU-vid for bike service. Just picked up a bike with hydraulic brakes which I’ve never owned in the past, right from the shop I heard a little rub on the rear brake. This alignment of loosening, holding the brake and then tightening is quite possibly the easiest thing I’ve ever done to fix my bike. Thank you.
Some grease on the bold and bolt head can help in this situation. You want to be sure to have a washer in there as well. In extreme cases the frame or fork mounting locations need to be faced.
