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Old 08-08-07, 06:17 AM   #1
Nibarlo
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Avid BB5 Disk Brake System

I just bought a trek 6000 which is equipped with Avid BB5s. These brakes have needed to be constantly adjusted in order for them not to rub. I took the bike for a 10 mile ride or so just on the streets last night and when i stopped the brakes were making a squeaking sound as if they're 90 years old. I'm hoping this is just part of the breaking in process. Anyone know if this is normal?
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Old 08-08-07, 06:23 AM   #2
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I have BB5's up front on my swobo otis. At first they rubbed, then squeaked, then practically fail to stop all together. I just use the rear coaster brake.
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Old 08-08-07, 11:39 AM   #3
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Mine work great and only squeal when wet.
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Old 08-08-07, 11:55 AM   #4
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Love the BB5s. Some rubbing at first, but now that they are broken in they have been problem free.
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Old 08-08-07, 01:00 PM   #5
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mine were a pain at first but now that they're broken in I love them....


I haven't had to make any adjustments in a while...and when I do it's only one or two clicks on the adjustment knob...
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Old 08-08-07, 01:04 PM   #6
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Mine are just completly different. I have not stoping power at all.

Adds a bit of fun to riding
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Old 08-08-07, 01:07 PM   #7
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it sounds like the people who don't have any stopping power don't have them adjusted correctly...

ideally the rotor is as close as it can be without rubbing the stationary pad...and the moving pad should come in to compress the rotor onto the stationary pad...

I like to keep mine pretty tight so I have a good positive feel on the brake lever...my pad probably only travels about 2mm and the stationary pad is 1mm or less from the rotor...

they stop me in a hurry...
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Old 08-08-07, 01:19 PM   #8
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stopping power aplenty here also.
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Old 08-08-07, 02:23 PM   #9
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I have the same bike/same brakes. It's like most things, when the product is blamed when it should be the adjustment. I am new to disc brakes but I am getting better at adjusting them. If you get them adjusted correctly you can damned near kill yourself with the braking power.

You shouldn't have rubbing. You need to readjust. Here's the manual. http://www.sram.com/_media/techdocs/...d7_English.pdf
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Old 08-08-07, 02:44 PM   #10
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I suppose it is possible your set is faulty and/or your rotors are warped, Nibarlo.

I am betting that they probably need adjusting, however.
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Old 08-08-07, 04:22 PM   #11
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Mine work great and only squeal when wet.
Wow.......the things I could say here.
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Old 08-08-07, 04:48 PM   #12
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That's just sick!
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Old 08-08-07, 06:58 PM   #13
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mine stop just fine..front and back they rub a tiny bit but only due to flex and i hope that will stop when they get even more broke in...
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Old 08-09-07, 05:06 PM   #14
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I had them and the stopping power was great but god almighty did they ever squeak. It drove me half insane.
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Old 08-09-07, 05:31 PM   #15
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Originally Posted by Nibarlo View Post
I'm hoping this is just part of the breaking in process. Anyone know if this is normal?
1. How much have rode this bike?
2. Who installed the brakes?
3. Have you tried to reinstall them?
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Old 08-09-07, 06:04 PM   #16
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1. How much have rode this bike?
2. Who installed the brakes?
3. Have you tried to reinstall them?
I really haven't rode the bike much. Probably all together about 75miles.
The brakes were installed by the bike shop when I bought the bike new.
No I haven't tried reinstalling them
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Old 08-09-07, 06:06 PM   #17
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Take it back to the shop to have the caliper re-alligned if it doesn't get better soon.
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Old 08-09-07, 07:40 PM   #18
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Wow.......the things I could say here.
No need to shame me for my lack of riding time, i beat myself up over it as it is

Next year! Next year the mtn bike will be back in action frequently and it will be the roadie that sits!
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Old 08-09-07, 07:58 PM   #19
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it sounds like the people who don't have any stopping power don't have them adjusted correctly...

ideally the rotor is as close as it can be without rubbing the stationary pad...and the moving pad should come in to compress the rotor onto the stationary pad...

I like to keep mine pretty tight so I have a good positive feel on the brake lever...my pad probably only travels about 2mm and the stationary pad is 1mm or less from the rotor...

they stop me in a hurry...
I just had them adjusted at the shop. When I figured they didn't stop I looked at them myself and they are properly adjusted. I dont belive its the pads because the bike is not even 6 months old.

Do you have any other tips I can try?
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Old 08-09-07, 08:14 PM   #20
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Do you have any other tips I can try?
What levers are you using?
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Old 08-09-07, 08:25 PM   #21
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FR 5's
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Old 08-09-07, 09:44 PM   #22
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I've got 'em on my new bike and so far so good
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Old 08-10-07, 05:25 AM   #23
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FR 5's
Sounds like the levers aren't the problem. Either they set up the brakes wrong or you have weak girly arms Maybe ask the shop to hook you up with new pads and see if that makes a difference.
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Old 08-10-07, 09:26 AM   #24
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I have the same bike/breaks.

I'm having a similar problem, but in addition to low stopping power and squealing, I've had to stop riding the 6000 b/c the front break causes a heavy vibration when in use (the vibration oscillates rapidly, so I think it has something to do with the pattern of holes/no holes on the rotors).

The vibration caused the head tube to come loose after just 15 or so miles (yeah, the vibration is THAT bad).

I'm taking the bike to my store to get it checked out.
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Old 08-10-07, 10:19 AM   #25
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They are a bit of a pain to get adjusted properly (compared to the BB7s I've also used), but they do have excellent stopping power once you get them dialed in. I have some on my Xtracycle, and even with me (220 lbs) plus the bike (~45 lbs) and 150 lbs of cargo, they stop on a dime. Well, maybe a nickel. But I can lay huge strips of rubber on either wheel -- if anything, my complaint would be that they are all too easy to lock up (not quite enough modulation). I'm using some old XTR levers and running full housing to both calipers.

Kill.cactus -- you mean the headset came loose, right? It would be pretty terrifying if the vibration made your head tube come loose...
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