http://citycyclingedinburgh.info/bbpress/ CityCyclingEdinburgh Forum » Topic: Disc brakes en Tue, 30 Jun 2026 04:51:55 +0000 http://citycyclingedinburgh.info/bbpress/topic.php?id=7676#post-315101 Wed, 02 Oct 2019 17:14:10 +0000 neddie 315101@http://citycyclingedinburgh.info/bbpress/ <p>My brake went into permanent-squeak-mode when the caliper bolts came loose. Basically, the whole thing was just floating around on the disc...</p> <p>One to watch out for! </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=7676#post-315099 Wed, 02 Oct 2019 16:27:12 +0000 unhurt 315099@http://citycyclingedinburgh.info/bbpress/ <p>Er. Maybe I have <strike>brain</strike> reading problems? (But I DO have a squeaky front brake...) </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=7676#post-315096 Wed, 02 Oct 2019 16:10:48 +0000 I were right about that saddle 315096@http://citycyclingedinburgh.info/bbpress/ <p>@unhurt</p> <p>Thought you had cables? </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=7676#post-315095 Wed, 02 Oct 2019 16:09:01 +0000 unhurt 315095@http://citycyclingedinburgh.info/bbpress/ <p><em>Oh yes.<br /> 1) Take the system off the bike altogether.<br /> 2) Take the pads out and clean external surfaces.<br /> 3) Clamp the freer piston with a bit of wood.<br /> 4) Pump the stuck piston out as far as you dare using the lever.<br /> 5) Do not pump it out of the caliper.<br /> 6) Clean and lubricate it.<br /> 7) Push it back in.<br /> 8) Repeat with other piston.<br /> 9) If the pistons don't move equally repeat 3) to 8) until they do. </em></p> <p>This all sounds very complicated, especially step 1) (and how do I avoid point 5)???)but I fear might be what mine need - the side with the wee-er adjusty wheel seems to not spring back properly when I release the front brake. Result: super annoying faint squeak-squeak-squeak. </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=7676#post-315086 Wed, 02 Oct 2019 15:13:09 +0000 neddie 315086@http://citycyclingedinburgh.info/bbpress/ <p>Thanks both.</p> <p>The pads were replaced fairly recently, both the new ones and the old ones are/were not unevenly worn.</p> <p>The pad replacement was not done by me, but the mechanic took the bike through the back for quite some time (which I was not happy about). This is why I always prefer to do stuff myself - at least then you know what happened...</p> <p>Also the mechanic failed to tighten the caliper bolts adequately, as they worked loose shortly after, and I had to retighten, readjust... </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=7676#post-315067 Wed, 02 Oct 2019 13:35:18 +0000 le_soigneur 315067@http://citycyclingedinburgh.info/bbpress/ <p>Loosen the mounting bolts of the caliper. (Personally I would take it off, inspect for uneven wear on the brake pads and renew if necessary. There will be a reason they have gone off-centre.)<br /> You should now be able to centre the caliper as the bolts fix on slots on the fork lugs by pulling on the brake lever.<br /> Re-tighten.<br /> <a href="https://www.tektro.com/upload/Product/F_20150915095449tQWA1W.PDF">Guide linkee</a> </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=7676#post-315066 Wed, 02 Oct 2019 13:32:11 +0000 I were right about that saddle 315066@http://citycyclingedinburgh.info/bbpress/ <p>Oh yes.</p> <p>1) Take the system off the bike altogether.<br /> 2) Take the pads out and clean external surfaces.<br /> 3) Clamp the freer piston with a bit of wood.<br /> 4) Pump the stuck piston out as far as you dare using the lever.<br /> 5) <strong>Do not pump it out of the caliper.</strong><br /> 6) Clean and lubricate it.<br /> 7) Push it back in.<br /> 8) Repeat with other piston.<br /> 9) If the pistons don't move equally repeat 3) to 8) until they do. </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=7676#post-315064 Wed, 02 Oct 2019 12:55:57 +0000 neddie 315064@http://citycyclingedinburgh.info/bbpress/ <p>OK, so the pistons on my front disc brake seem to be moving unevenly.</p> <p>They both move, so are not completely seized, but everything seems to be offset to one side, i.e. one piston is completely in, the other quite a long way out.</p> <p>This creates two issues:</p> <p>1. The pads cannot be centred on the disc because moving the caliper any further to the side causes it to foul on the spokes.</p> <p>2. The pads bend the disc when the brake is applied, causing the disc to rub against the frame/mount. &lt;scream emoji&gt;</p> <p>Any ideas on how to fix...?</p> <p>(Brake is a hydraulic Tektro Auriga) </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=7676#post-78301 Tue, 17 Jul 2012 13:08:28 +0000 steveo 78301@http://citycyclingedinburgh.info/bbpress/ <p>Replace the pads was going to be my next guess! :D </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=7676#post-78300 Tue, 17 Jul 2012 13:00:04 +0000 Roibeard 78300@http://citycyclingedinburgh.info/bbpress/ <p>Just goes to show, you should never trust the interweb...</p> <p>Good job someone qualified looked at them IRL!</p> <p>Robert </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=7676#post-78281 Tue, 17 Jul 2012 11:59:09 +0000 SRD 78281@http://citycyclingedinburgh.info/bbpress/ <p>TBW says the brake pads were 'shattered'. Thanks all for the advice :) </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=7676#post-78196 Mon, 16 Jul 2012 16:44:18 +0000 SRD 78196@http://citycyclingedinburgh.info/bbpress/ <p>@custard My inability to even answer that question suggests I had better swallow my pride and head across the meadows... </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=7676#post-78194 Mon, 16 Jul 2012 16:31:01 +0000 custard 78194@http://citycyclingedinburgh.info/bbpress/ <p>what kind are they? </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=7676#post-78193 Mon, 16 Jul 2012 16:19:49 +0000 Roibeard 78193@http://citycyclingedinburgh.info/bbpress/ <p>I'd opt for a minor adjustment - on my discs (Avid Juicy 3-ish, and Magura Louise), the calipers are attached to brackets which in turn are attached to the forks.</p> <p>The caliper to bracket bolts go through oval holes to allow some adjustment.</p> <p>I loosen off these bolts, apply the brake, then re-tighten the bolts, all of which ensures the pads are aligned with the discs.</p> <p>I've needed to do this about quarterly with the Avid brakes to prevent rubbing or squeaks.</p> <p>I'm sure mine are actually meant to self compensate for wear...</p> <p>Anyway, usual warnings apply, brakes are safety critical, etc...</p> <p>Robert </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=7676#post-78181 Mon, 16 Jul 2012 15:13:39 +0000 steveo 78181@http://citycyclingedinburgh.info/bbpress/ <p>Is the disk straight? I managed to warp a disk one particularly cold morning with a particularly fast stop. Pads might have come out of centre though this usually sorts its self out. Any problems whist braking? </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=7676#post-78177 Mon, 16 Jul 2012 15:02:02 +0000 SRD 78177@http://citycyclingedinburgh.info/bbpress/ <p>My disc brake has been really noisy of late. Started when we had two adults riding - don't know if weight was a factor. First sounded like a leaf or something stuck in it. Then an intermittent rubbing noise. Also a sort of vibrating hum when wheeling it along, but not riding. </p> <p>Any ideas? Suppose I had better pop into tbw, but I seem to be in there a lot saying 'its making a funny noise'. </p>