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Old 04-14-12, 09:46 PM   #1
oswaldo
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New Bike with Disk Brakes - Front Brake "Pulling" the Wheel

Hi All,

Need some advice on how to fix a problem with my new Orbea H20 disk brakes.

When I put the bike together, just the wheels, seat pole, handle bars etc, I noticed that the front disk brakes and the wheel did not align. Whilst it is possible to turn the wheel it requires more effort that expected.

I went for a ride today thinking that I would just need to break in the new brakes, but noticed that when I applied the front brakes that the wheel was being pulled towards the brakes, which is obviously not good.

One other item I noticed is that whoever installed the brakes obviously made a mistake as the paint was "chipped" so they had tried to rectify the problem. Unfortunately I am not able to take the bike back to the store I purchased it from as I am in another country now.

My first thought is to add two washers between the mounts and the brake. What do you think? Any other ideas?

Cheers.
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Old 04-14-12, 10:06 PM   #2
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All disk brake calipers can be aligned with the disk. Since you can't take it back to the original shop, you can either take it to your local shop or learn to do it yourself. It would help to know what brand of brakes are on the bike to point you in the right direction.
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Old 04-14-12, 10:12 PM   #3
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Thanks, the brakes are Shimano Formula RX. (should have included this info in the original post)

Would rather fix it myself anyway
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Old 04-14-12, 11:44 PM   #4
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The RX brakes are either on a mount adapter or on post mount studs for the front wheel. The mount points should be slightly slotted. The usual method to center the caliper is to clamp the lever tightly then loosen the fixing screws for the caliper, wiggle the caliper lightly to aid it in finding it's center than to pinch and then tighten the screws again. Then when you release the lever the caliper SHOULD be centered and the pads will retract back a hair's width from the disc. If it doesn't or can't do this then you need to look at why. It could be the post mounts on the forks or it could be the wheel alignment in the dropout mouths or it could be an issue with the spacers on the wheel not locating the disc in the right relationship with the axle nut face.
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Old 04-14-12, 11:52 PM   #5
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also check that the front nut or skewer is properly tightened and not in the 'open' position.
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Old 04-15-12, 01:34 AM   #6
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Fork may be under built, too light, for adding the disc brake at the tip.

seen the Buell motorcycles lately? their disc is attached to the rim rather than the hub,

said to replace dual disc Mechs attached to the Hub, of other high performance bikes.

Last edited by fietsbob; 04-17-12 at 11:24 AM.
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Old 04-15-12, 02:38 AM   #7
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http://www.ecovelo.info/2011/04/15/a...5-disc-brakes/

http://bikeshopgirl.com/2011/08/how-...id-bb5-brakes/
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Old 04-15-12, 07:18 AM   #8
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Quote:
Originally Posted by AEO View Post
also check that the front nut or skewer is properly tightened and not in the 'open' position.
Make certain that the axle is fuly seated in the dropouts. The adjusting nut on the skewer should be tight enough that the lever makes a mark on your palm when you close it.
Also check that you do not have a broken front axle and that the bearing cones are properly adjusted.
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Old 04-16-12, 09:02 AM   #9
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Thanks guys, seems to be ok now. Needed to reseat the brake. I think that the bike mechanic who tried to setup the brake did not have the strength to loosen the Mount Adapter, so tried to hard with post mounts and did a bad job.

Does not seem to be pulling now. Will go for a ride and see if it is fixed. The brakes are squealing now when I spin the wheel, which I am guessing is a good thing???
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Old 04-16-12, 10:31 AM   #10
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The brakes are squealing now when I spin the wheel, which I am guessing is a good thing???
Squealing when you squeeze the brake lever or just squealing when you spin the wheel ?
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Old 04-17-12, 08:35 AM   #11
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Spin the wheel, but it now at leasts spins a few rotations, where before it was barely making one. Please note that it is not a loud squeal, it sounds like it is only just touching the disk.
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Old 04-17-12, 09:54 AM   #12
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It is not adjusted correctly yet then.
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Old 04-17-12, 10:03 AM   #13
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Is it a continual rub on the whole rotor or is it just rubbing in one or more spots ?
Is it rubbing on the inside pad, the outside pad or both pads ?

Turn the bike upside down, spin the wheel slowly, have a close look at where the rotor is rubbing and report back.
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Old 04-23-12, 08:32 AM   #14
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Hi, there is definitely a problem with the alignment of the brakes, I am guessing that I need to adjust the caliphers, but also guessing that it will be the one "allen" head that I don't have a key that fits.

Both the front and the rear brakes are rubbing, although they are not squealing, probably because there is too much friction. The front brake is rubbing on the inside, the rear both sides

Apologies for the slow response, work getting in the way of life again.

Last edited by oswaldo; 04-23-12 at 08:52 AM.
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Old 04-28-12, 09:32 PM   #15
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I have tried to adjust the brakes but no joy, the adjustments did not make a difference. Any ideas on what I am doing wrong?
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Old 04-29-12, 12:13 AM   #16
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Is this how you adjusted your brake ?

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Old 04-30-12, 10:08 PM   #17
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Hi, very similar to what I have been trying, but the rubber band made it easier. My front wheel is spinning a lot freer, but the pads on both the front and the back wheels are still touching the brake rim. Also the when applying the back brake it jerks a bit, any ideas.

Thanks for the video, will check out more from them, keep forgetting about U-Tube.
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