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Shimano Slx brake pad wont hit avid g3 rotor right

2903 Views 20 Replies 5 Participants Last post by Dirt Bringer, Jul 18, 2010

Dirt Bringer

Discussion Starter · Jul 12, 2010

Hey guys. This question is a bit odd. I just got a shimano slx brake (front) and it wont quite hit the rotor all the way (the pad). There is about 1/2 to 3/4mm of space between the lower part of the rotor and the bottom of the pad. Im using an avid adapter through post mounts to a manitou post mount fork. Its also slightly slanted on the adapter and not flush to the place where it bolts in (the caliper) due to the design and since I didnt use cps bolts (didnt fit). A mechanic I took it to said its fine but Im a perfectionist. It does work yes, but whats the best approach to this. Should I even concern myself with it?

1 - 20 of 21 Posts

crisillo

· #2 · Jul 12, 2010

is the pad making contact on all the surface?

You say it misses at the bottom, but if the whole pad makes contact with the rotor, then there is not much more you can get, you would just be shifting where the pads sit on the rotor.

Dirt Bringer

Discussion Starter · #3 · Jul 12, 2010

Not completely. About 1/2 to 1/3mm of the pad is riding above the top of thd rotor. Its not a huge amount but im not sure if it has any significant effect in the end...

shiggy

· #4 · Jul 12, 2010

Dirt Bringer said:
Not completely. About 1/2 to 1/3mm of the pad is riding above the top of thd rotor. Its not a huge amount but im not sure if it has any significant effect in the end...

You are worried about 0.33-0.5mm? Really?

Dirt Bringer

Discussion Starter · #5 · Jul 12, 2010

shiggy said:
You are worried about 0.33-0.5mm? Really?

Closer to .5 to .75. I just want as much power as I can get. More importantly the caliper mounts are not flush with the adapter...that worries me more.

shiggy

· #6 · Jul 12, 2010

Dirt Bringer said:
Closer to .5 to .75. I just want as much power as I can get. More importantly the caliper mounts are not flush with the adapter...that worries me more.

The rotor/bracket fit is a much bigger issue. Fix that and I bet the rotor "fit" will improve.

Dirt Bringer

Discussion Starter · #7 · Jul 12, 2010

shiggy said:
The rotor/bracket fit is a much bigger issue. Fix that and I bet the rotor "fit" will improve.

Sorry I dont quite follow. What do you mean by rotor/bracket fit?

shiggy

· #8 · Jul 12, 2010

Dirt Bringer said:
Sorry I dont quite follow. What do you mean by rotor/bracket fit?

Meant caliper/bracket fit

Dirt Bringer

Discussion Starter · #9 · Jul 12, 2010

shiggy said:
Meant caliper/bracket fit

Ya thats what gets me confused. If I put any spacers in to make it fit as it should, it pushes the pads even farther from the rotor. Its on an angle due to lack of spacers. I think that maybe the avid adapters just dont work with shimano stuff?

shiggy

· #10 · Jul 12, 2010

Dirt Bringer said:
Ya thats what gets me confused. If I put any spacers in to make it fit as it should, it pushes the pads even farther from the rotor. Its on an angle due to lack of spacers. I think that maybe the avid adapters just dont work with shimano stuff?

Are you using the Avid CPS washer stack with the Shimano caliper? If so, GET RID OF THEM!

Reasons discussed in this thread: http://forums.mtbr.com/showthread.php?t=633266

Dirt Bringer

Discussion Starter · #11 · Jul 12, 2010

Ok this is how I have it set up at the moment. Tell me if there is something I shouldnt be doing here.

Uploaded with ImageShack.us
Thanks.

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shiggy

· #12 · Jul 12, 2010

Dirt Bringer said:
Ok this is how I have it set up at the moment. Tell me if there is something I shouldnt be doing here.

Uploaded with ImageShack.us
Thanks.

I see no problems

Dirt Bringer

Discussion Starter · #13 · Jul 12, 2010

Cool. I guess I should just ignore the lack of flushness between the adapter and caliper? It is minmal after all. Thanks alot!

shiggy

· #14 · Jul 12, 2010

Dirt Bringer said:
Cool. I guess I should just ignore the lack of flushness between the adapter and caliper? It is minmal after all. Thanks alot!

I do not see it in the pics, but if it bothers you, file the bracket.

watermoccasin

· #15 · Jul 12, 2010

Looks like the adapter is on upside down. Most front adapters have UP and a little arrow engraved or painted on the outside, like this:

http://www.universalcycles.com/shopping/product_details.php?id=18669&category=496

shiggy

· #16 · Jul 12, 2010

watermoccasin said:
Looks like the adapter is on upside down. Most front adapters have UP and a little arrow engraved or painted on the outside, like this:

http://www.universalcycles.com/shopping/product_details.php?id=18669&category=496

Nope. Bracket is on right side up.

Bicycle part Bicycle drivetrain part Bicycle chain Crankset Bicycle

hmmm...from my own pic/setup, it does appear the Avid bracket is not totally parallel to the fork posts. Time for a file if you are not using an Avid caliper.

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Dirt Bringer

Discussion Starter · #17 · Jul 14, 2010

So wait. How could shimano realize I havent been using their recommended hardware? Am I not risking damage to the caliper mounting plates using an off camber adapter?

hardtailkid

· #18 · Jul 17, 2010

Are you only running it on the front?

Dirt Bringer

Discussion Starter · #19 · Jul 17, 2010

Yes. I solved the problem. Had to file both sides of the adapter on a file till they could accept the caliper flat and flush to the facing rather than angled off.

hardtailkid

· #20 · Jul 17, 2010

How thick is the G3 compared to Hayes V6 or V7?

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