Cliver

Just got a set of I9 wheels and am having some trouble setting them up on my bike. I swapped the rotors from my old wheelset onto the I9s, but for some reason I can't get rid of some substantial friction in the rear brake (Avid BB7s). I've aligned/calibrated the rear brake five times now and just can't seem to get it right. Here are the steps I've gone through thus far:

1. Pads turned all the way out (counter-clockwise)
2. Caliper bolts loosened
3. Inner pad turned in one full rotation
4. Outer pad turned in completely
- At this point the wheel is locked in place
5. Caliper slightly adjusted (various adjustments to position at this point) then tightened down
6. Fine adjustments to pads

No matter what, I always wind up with the same situation: can't seem to get even space between the inner pad and the rotor. Thoughts?

fietsbob

Cant see, go to a shop, they can .. blind guess:

if you backed out the fixed pad but it still drags, the return spring
,between the pads may be DNF.

Cliver

But wouldn't that mean that there would've been a problem before I tried to set up the new wheels? The brake worked fine with the other set.

mechBgon

Try loosening up the caliper and manually positioning it to get even space between the inner pad & rotor.

Cliver

I've tried that more than once now (just finished another attempt - still no luck). The rotor is true as it gets, too. I'm confused...

Cliver

Spoke with a guy at a shop in Knoxville who suggested that the width of the hub is probably more narrow than the previous hub, resulting in the the position of the rotor being closer (too close) to the inner pad. Said to try shims to make up the difference. Sound right/possible to anyone else?

Leebo

Correct caliper bracket ?

fietsbob

shims are made to move the disc outboard a bit. either 3 pieces with 2 holes,
or 1 piece ring with 6 holes..

Might be something out there for centerlock hubs too..