Disc rubbing on brake mount.

Whitesnake

Hi Everyone

I have a a problem with my front disc rubbing against the brake mount on the fork. There is very little clearance (barely visible) and after noticing a vibration/noise I checked and can see some paint wear on the fork where the disc is touching. If I spin the wheel it does not seem to touch.

I cannot see a way of adjusting the disc to give more clearance. Wheels are Crossmax with Formula RX brakes on Fox 32 Forks.

Can the disc position be adjusted?

Thanks in advance.

big2000dave

i had the same problem with my fox 36's rubbing on my hope floating dics, i had to place a spacer by my chris king hub between the hub and the fork to give me a little more space.

kenan

big2000dave wrote:

i had the same problem with my fox 36's rubbing on my hope floating dics, i had to place a spacer by my chris king hub between the hub and the fork to give me a little more space.

I have also done this in the past. Not had any trouble since doing it, bike shop said it wouldn't work :roll:

Chunkers1980

Yeah - 2 options.

Space out the forks and/or frame - even as much as 1mm extra in lock nut thickness can sort it out.

Face the mounts.

Whitesnake

Thanks for the advice, I will look into these options.

One thing first though, the bike is only 8 weeks old or so. Should I go back to the bike shop and see what they can do or am I wasting my time in doing so?

Cheers

Chunkers1980

Yes - shop first for a couple of months old bike.

nicklouse

Fox 32 Forks?

what year?

current ones have post mounts so you should be able to adjust the caliper.

Do not just add a spacer as you will force the legs to run incorrectly and you will wear the forks out too fast.

So what mounts on the fork? what size disc?

but as it is a new bike the shop should sort it.

Whitesnake

Thanks for the advice.

I went into the shop (Evans, Milton Keynes) and spoke to a chap there. I showed him what I meant on the same model they had on display and his first reaction was

"Its a design fault by Commencal, not sure what we can do"

I said that I was looking to sort it and needed advice not someone to blame. He went and spoke to a manager and then asked me to bring the bike in for inspection and adjustment. I asked to be shown what to do which he did and said if I have no joy bring it in then, but again he said that it was a design issue with Commencal.

Having got home, I have now adjusted as described and it seems to have done the trick. Fairly easy fix in the end but I'm fairly new and never had disc brakes before. I'll know for next time!

Thanks again for the comments.

Whitesnake

Hi Again

Having read my previous post I just wanted to say that I don't mean to portray Evans in a bad light, They gave me loads of good advice on the purchase of the bike and subsequent queries about other products. I was just taken aback by the initial response/comment. The advice given to sort out was spot on and took me minutes to sort, so thanks to them for that.

Cheers

Anonymous

So what DID you do to fix it?

Whitesnake

Sorry Yeehaamcgee, good point!

The disc was running clear with no brake applied and only seemed to rub when pressure was applied, they suggested that the inside ( nearest to center of hub) was putting more pressure than outside, causing the disc to flex into the mount. They suggested loosing the caliper and re-centering the disc by eye. When I checked the alignment it was off center between the caliper. I realigned it and it has increased the clearance between disc and fork by a very small amount when the brake is applied but enough to clear it. There is a definite gap now when brake is on, unlike before. A quick ride around garden shows no noise or vibration when brake applied, so I guess this has done the trick.

I hope this is clear!

ilovedirt

A commencal design fault? Sounds like the salesman was full of crap or has no idea what he was talking about (a common fault at evans, funnily enough), considering commencal make neither hubs, brakes or forks.

Anonymous

Hmm, does not sound like a commencal issue.

nicklouse

sounds just like poor set up.