[links0311]

The front BB7 went on great, the rear not so much. I used the correct 160R mount but the brake appears to be too low. When the wheel spins it sounds like ka-chunk ka-chunk and doesn't spin smoothly. What am I doing wrong? Thanks.

 

[Zoke2]

do you have the adapter facing the right way ... with the arrow facing forward

 

[links0311]

I'm guessing it's facing forward. I took it out of the box with the adaptor already attached to the brake. I'm watching the tour and will work on it again after. Thanks for the reply.

 

[shiggy]

I'm guessing it's facing forward. I took it out of the box with the adaptor already attached to the brake. I'm watching the tour and will work on it again after. Thanks for the reply.

The caliper could also be misaligned.
Rotor out of true.

 

[links0311]

The rotor is true. It's almost as if the rotor is sitting too deep inside the caliper itself. I'll look at it again tomorrow morning.

 

[shiggy]

The rotor is true. It's almost as if the rotor is sitting too deep inside the caliper itself. I'll look at it again tomorrow morning.

Which suggests the mounting bracket is on backwards.

 

[petey15]

links - I had the same issue and turns out, the adapter that was already on the caliper was for the front, if it's a 160mm rotor, or the rear, if it's a 140 (?). Anyway, I have to put the "spare" adapter on and attach the calipers to that. The folks here reminded me that there is a front and a rear adapter (doh!) and Avid doesn't differentiate between front and rear when you order them, they automatically set it up for the front. At least, that's what I think is going on.

 

[archer]

If the adapter turns out to be right look at the little arm that pulls the cable and make sure the screw on it is tight.

I had a small amount of play develop on my bike a couple months after I put BB7s on and thought it might have been a loose hub. It didn't so much audibly clunk as when the brake on that wheel was locked you could move the bike an inch or so back and forth.

 

[shiggy]

links - I had the same issue and turns out, the adapter that was already on the caliper was for the front, if it's a 160mm rotor, or the rear, if it's a 140 (?). Anyway, I have to put the "spare" adapter on and attach the calipers to that. The folks here reminded me that there is a front and a rear adapter (doh!) and Avid doesn't differentiate between front and rear when you order them, they automatically set it up for the front. At least, that's what I think is going on.

Possible, but it is likely the axle would not even fit into the dropouts with the front bracket mounted on the rear and a 160mm rotor.

 

[links0311]

I have two pictures of the rear caliper that I want to post, how do you go about posting pictures on these forums? I took the pics with my phone, emailed them to myself, and then saved them to my desktop.

 

[static_mass]

You have to host them somewhere. I use ImageShack to upload pictures for free. Then you can grab the link to the picture off of ImageShack and post it here.

http://imageshack.us/

 

[wv_bob]

I have two pictures of the rear caliper that I want to post, how do you go about posting pictures on these forums? I took the pics with my phone, emailed them to myself, and then saved them to my desktop.

Start a reply, go to Advanced mode, find and click the upload images button, and follow the bouncing prompts to browse to and select your photo. Once you're finished, close that dialog box, type something into the message and save it. No other storage host required.

 

[static_mass]

Oh, cool... most other forums I've used don't let you do that, or if they do, there's a set limit to how many you can upload.

 

[links0311]

Attached are the two photos. Hopefully this works.

 

[shiggy]

Attached are the two photos. Hopefully this works.

The required CPS washers are missing. They did not come out of the factory that way.

Every Avid disc brake uses them.

 

[links0311]

They are missing you're right. I didn't notice that. I'll go see where they are after dinner and hopefully that fixes the problem.

 

[shiggy]

They are missing you're right. I didn't notice that. I'll go see where they are after dinner and hopefully that fixes the problem.

It will fix it. Be sure you install the washer stacks correctly.

 

[links0311]

That fixed it. Should I have a stack on either side of the caliper or just one side? The front has two stacks. With the screws I'm using now I only have room for one stack. Things must have really got mixed around while I was working.

 

[links0311]

Thanks everyone for your responses, and especially Shiggy, sometimes the answer is staring you right in the face.

 

[Zoke2]

you should have 2 pieces on each side of the caliper with the beveled edges facing into each other so the flat side is at the top and the bottom