Avid BB5 frustration
11-09-19 | 01:30 PM
#51
Thread Starter
Senior Member
Joined: Jul 2009
Posts: 1,753
Likes: 387
Bikes: 1986 KHS Fiero, 1989 Trek 950, 1990 Trek 7000, 1991 Gary Fisher Hoo Koo E Koo, 1992 Trek 1400, 1997 Cannondale CAD2 R300, 1998 Cannondale CAD2 R200, 2002 Marin San Rafael, 2006 Cannondale CAAD8 R1000, 2010 Performance Access XCL9R
This would be my approach. From my limited experience the road BB5 and BB7 were shipped for use with 140mm rotors. For 160mm rotors the caliper needs to be tilted away from the rotor by extending the length of the front post - which you can see on your old mtb caliber adaptor. The new one looks like it will only work on a 140mm rotor, even though it was apparently shipped with a 160mm rotor. Just a guess. i bought a (post mount in my case) adaptor kit instead of fiddling with washers and spacers, which has the correct interface for the adjustment washers to seat correctly. As was asked before, why BB5 and not BB7, which are tougher, more precise, both pads are adjustable and uses larger pads, which would possibly not necessitate using such large rotors.
11-09-19 | 01:40 PM
#52
Thread Starter
Senior Member
Joined: Jul 2009
Posts: 1,753
Likes: 387
Bikes: 1986 KHS Fiero, 1989 Trek 950, 1990 Trek 7000, 1991 Gary Fisher Hoo Koo E Koo, 1992 Trek 1400, 1997 Cannondale CAD2 R300, 1998 Cannondale CAD2 R200, 2002 Marin San Rafael, 2006 Cannondale CAAD8 R1000, 2010 Performance Access XCL9R
Self inflicted error on my part. Had the adapter turned around. I did use the one from the existing caliper. And it stops much much better. Some fine tuning and things will be real good... I have no doubt I can drag the rear on dirt and gravel. And while I am close to locking it up right now, I do stop on just the rear if need be. At 241 pounds, I like to get stopped.
Thanks everyone. I have compression less cable and housing in hand, new bar tape too. I have some repair parts for Sora 3500 shifters (cosmetic damage), so I need the brifters off to get the hoods swapped out, unless I'm missing something. Lots of things to knock out in one fix.
I did mount the disc to my other wheel, and the new disc stops even better.
Much better...
Last edited by zjrog; 11-09-19 at 02:01 PM.
11-09-19 | 08:41 PM
#53
Junior Member
Joined: Jun 2018
Posts: 139
Likes: 33
From: L.A.
Bikes: Giant Anyroad
BB7s plus rotors plus the adaptor kits does start to get a bit pricey.
