Setting Up Bb7

[dErZ]

After contacting CRC they sent me the correct (front) 185 adapter. I have been able to install the brake. I have followed this set up http://howtosetuptheavidbb7.weebly.com/how-to-set-up-the-avid-bb7.html

but there are 2 things that are puzzling me.

Firstly the disc doesnt appear to be fully utiized (see picture) can other BB7 owners check the pad/disc contact.

The second issue is centralising the disc and then tightening up the CPS bolts. Ive had avids before and I quite rate the CPS bolts but if you follow the instructions below the outer pad is already touching the disc so it seems as if my brake mount on the fork is in the wrong place/or bent!!!!

"Use the pad adjustment knobs to back out the pads all the way. Now turn the inner pad adjuster all the way in as far as it will go (though don't force it). Then back out again by 10 clicks.

Now turn the outer adjuster in until the caliper is locked against the brake disc. Tighten the caliper mounting bolts. The caliper will now be centred properly. If you have Avid Speed Dial levers you should now adjust the brake lever reach (always do this BEFORE you tighten the cable pinch bolt on the caliper). Now pull the cable tight and secure it with the cable pinch bolt. Now back out both the pad adjustment knobs all the way"

[Dan6061]

Remove some spacers between the caliper and the mount.

[dErZ]

Remove some spacers between the caliper and the mount.

Have you removed them?

I did think this but those spacers form the CPS (caliper positioning system) so by removing them would render avids amazing positioning system useless.

I run the Xt M775 on my other 2 mountain bikes and they dont have a CPS they just have left to right adjustment on the caliper/bracket and they are awesome.

[Alex Dark]

dude, its not rocket science...if it doesnt reach, reduce the radius and bring the caliper in towards the rotor. Set the inner pad so its as near to rubbing as possible, and the outer so it makes the lever feel noice Sorted

[Matt Burrows]

Have you removed them?

I did think this but those spacers form the CPS (caliper positioning system) so by removing them would render avids amazing positioning system useless.

I run the Xt M775 on my other 2 mountain bikes and they dont have a CPS they just have left to right adjustment on the caliper/bracket and they are awesome.

Yes your right, keep the spacers in. Avid's CPS sytem allows them to get away with lower tolerances during manufacture. If you take the spacers out you will probably find the brake is a long way from being set-up square even when the disc mount is faced! As for your current issue, it looks like the pads are way too high on the rotor, something definitely isn't right! It's either the adaptor (wrong size/label or badly manufactured), the incorrect rotor for the adaptor or probably the most likely, the disc mount on the forks being on the piss. The only way to check the disc mount is to either try another disc brake/fork and see if the issue goes away, or take the forks to your nearest bike shop with a Hope disc mount facing tool and ask them to check it.

As for aligning the caliper, i'd say ignore avids methods and just set it up by eye. It is a fiddly job that will take a few attempts and some patience. It helps alot if you put a sheet of paper or something white behind the caliper when you are looking throught it. Start with both bolts loose and the pads wound out, look down through the caliper between the pads and move the caliper until it is aligned. Now hold the caliper in position while you alternately tighten the bolts. You may find the caliper tries to twist when you do up the bolts, but with a few attempts you should be able to get it perfectly square.