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bb-7 brake mounting to tight?

Old 09-21-20, 12:18 PM
  #1  
suydam
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bb-7 brake mounting to tight?

I've got some BB-7 brakes from my parts bin. I have a Salsa Mukwa carbon fork for my 2015 aluminum Beargrease fat bike.

I'm trying to mount the calipers to the fork but I think I'm missing some spacers or something. When I tighten down the caliper bolts onto the fork-mounting holes, the wheel doesn't move. Not because the pads are touching the rotor, but because the entire top of the caliper assembly is leaning against the edge of the rotor.

Does that make sense? I see a lot of "CPS" mounting kits for Avid brakes on Amazon, etc. but nothing that says if they're going to work with BB-7 mech disc MTB brakes.
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Old 09-21-20, 01:15 PM
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davidad
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Go to the Avid site and see how they mount.
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Old 09-21-20, 06:36 PM
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cobba
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BB7's need the extra spacing that CPS washers provide.

https://www.sram.com/en/sram/models/db-blbg-7m-a1
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Old 09-23-20, 06:25 AM
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I've made V-brake cone-and-cup washers work in place of the genuine CPS kit. (I think that's what the CPS parts are.)

As I recall, you need the thin cups from V-brake pads. Most pads come with both a thin and a thick cup, and you place either one on the inside or outside of the pad to your liking. I had a bunch of pads in my bin, so I cannibalized a bunch to get eight of the thin cups. The cone washers are all the same.
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