**kin' Disk Brakes !!!
thedktor
Posts: 234
Avid 7's on my new Stumpjumper FSR: First few rides it was damp, but not actually raining and the bl**dy things were squawking like I couldn't believe, I mean this is an œ1800 bike not some œ50 Tesco special. [:0]
Next big ride at the weekend, it was dry, and I did some massive downhills so everything was really bedded in. The squawking was pretty much gone but a little showed up occasionally, and I'm pretty sure with the next bit of dampness they will be noisy again.
But just to really wind me up the back brake rubbed slightly and let itself known by squeaking! GRRRRR!!! [:(!]
Mid-ride I adjusted the rear calliper but the L piston refused to move appreciably so the R one over-compensated and so still the R pad rubbed. Goddam it! [:(!]
What is ironic is the cheap Tektros on my Fury never rubbed, or squawked, or needed any attention AT ALL through the whole winter!
I was quite p*ssed off, and after investigating more it seems the Avids are prone to noise. If that's the case I can't live with the bike - am I over-reacting ???! [:I]
Can anyone assure me that I can get these brakes to work reasonably quietly, in wet conditions, ANY conditions?
Thanks !
TD
Next big ride at the weekend, it was dry, and I did some massive downhills so everything was really bedded in. The squawking was pretty much gone but a little showed up occasionally, and I'm pretty sure with the next bit of dampness they will be noisy again.
But just to really wind me up the back brake rubbed slightly and let itself known by squeaking! GRRRRR!!! [:(!]
Mid-ride I adjusted the rear calliper but the L piston refused to move appreciably so the R one over-compensated and so still the R pad rubbed. Goddam it! [:(!]
What is ironic is the cheap Tektros on my Fury never rubbed, or squawked, or needed any attention AT ALL through the whole winter!
I was quite p*ssed off, and after investigating more it seems the Avids are prone to noise. If that's the case I can't live with the bike - am I over-reacting ???! [:I]
Can anyone assure me that I can get these brakes to work reasonably quietly, in wet conditions, ANY conditions?
Thanks !
TD
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mine were fine untill they got a bit glased over. then only dry riding was quiet. try a different pad maker when it is time to change pads, it seems that avid have chosen the old Hope pad maker.
nick
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<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by thedktor</i>
Mid-ride I adjusted the rear calliper but the L piston refused to move appreciably so the R one over-compensated and so still the R pad rubbed. Goddam it! [:(!]
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
Hmm, if the caliper body is centered on the rotor, shouldn't the uneven pad travel bend the rotor then? Have you tried carefully pushing the pistons back inside with a screwdriver? I had problems with my brake too, pads bending rotor meant they don't grip it fully perpendicular, after pushing the pistons in 2-3 times the pads started coming out evenly, now the system seems centered properly with and without the brakes applied. I think you really have to center it well, even the slightest assymetry may reduce the brake effectiveness. I thought it doesn't matter if it's a little off, but it seems it does!
Btw, tightening the caliper bolts, do they have to be tightened very hard, like the allen key leaving a white streak in my palm, or not that hard?
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Hmm, well I'm a bit calmer now about it all but we will see at the weekend.
The problem with the back brake is that one piston just isnt moving much compared to the other so either its sticking or has air behind it. I zip-tied the free piston and still the sticky one refused to move much! Didnt have enough time to fiddle last night so will work the bad piston in and out a bit next time, see if it loosens.
As for the squwarking front disc, well if it continues it will go back to the LBS, either to be fixed, or refunded!!
I guess part of the problem is that on a high-end bike everything is just so thin and light that there is no meat to stop vibration and hence noise?
TD0 -
The juicy 5's squeeked on my new Stumpy and i discovered it was the caliper rubbing on the top of the disk!! Two extra washers sorted it.0
