New: Take part in the January 2020 BikeRide Giveaway for a HEDKAYSE | ONE bike helmet

Welcome guest! Register or sign in to participate in the cycling discussions.


Disk brakes self tighten
#1
My disk brakes seem to self tighten. I'll adjust them perfectly so that there is absolutely no rubbing then I'll go a week without riding and they'll be rubbing when I get back. Sometimes rubbing quite badly. It seems weird but I've had this happen countless times. Every time the bike sits for a week, the brakes rub.

I have hayes MX4 calipers.
  Reply
#2
Are you using a torque wrench?
  Reply
#3
(10-21-2011, 05:14 AM)dave_sd Wrote:  Are you using a torque wrench?

I think what Dave means is... are you tightening to the specs when making your adjustment? If you are not, then perhaps they are loosening for that reason.
  Reply
#4
So are you saying that the caliper pistons are creeping out on their own causing the pads to clamp down on the rotor?
  Reply
#5
Hmmm.. that is strange. Do your brakes feel firm when working properly or a bit spongy? Have they been bled properly? Sometimes air bubbles can do that. Check the master cylinder also make sure its valving is clean. I suggest bleeding and resetting entire system.
Some drag on the discs is normal.
Never Give Up!!!
  Reply
#6
(10-24-2011, 02:56 AM)GeorgeET Wrote:  Hmmm.. that is strange. Do your brakes feel firm when working properly or a bit spongy? Have they been bled properly? Sometimes air bubbles can do that. Check the master cylinder also make sure its valving is clean. I suggest bleeding and resetting entire system.
Some drag on the discs is normal.

Yep - probably right about that. If refilling the lines, calipers and levers don't work - try replacing the piston seals.
  Reply
#7
Sorry about the really slow reply... I haven't ridden in a while.

No I'm not using a torque wrench.

They're mechanical, not hydraulic.

@biciloco: Yes that is pretty much it.

You say that some drag is normal? Is it normal for them to start dragging after I adjusted them so I wouldn't?


Thank you so much for the help... I'll remember to check back sooner this time.
  Reply
#8
Wow, that's an oldie. For lock of system info. Generic reply. First clean and lubricate per owners manual . than check this video for adjustment. HTH.


http://www.youtube.com/watch?v=rtm0bwY1ZSY
Never Give Up!!!
  Reply


Possibly Related Threads...
Thread Author Replies Views Last Post
  How to tighten brakes? SpeedBikeNut32 2 4,645 01-20-2015, 10:44 PM
Last Post: cny-man
  Headset wont tighten Tridox 5 6,957 07-03-2014, 12:14 AM
Last Post: nfmisso
  How do I re-tighten my front derailleur cable? Ruya 10 18,595 06-16-2013, 02:42 PM
Last Post: Painkiller
  Can't tighten loose handlebar Wheelacw32 5 12,961 06-09-2013, 11:14 PM
Last Post: Painkiller
  Headset bolt will not tighten - Schwinn Traveler mattybey 1 6,030 03-18-2013, 10:42 PM
Last Post: GeorgeET
  Can't tighten - can't raise? timlh 22 18,487 12-03-2012, 04:42 AM
Last Post: Bill
  Can't tighten bolt into stem FeelingStupid! 1 9,449 09-15-2012, 11:12 PM
Last Post: Painkiller
  Noobie - Adjusting Mechanical disk brakes, brake lever is loose BigBossPW 8 14,426 07-08-2012, 05:59 PM
Last Post: BigBossPW
  Noise from front disk brake under pressure kwwmackenzie 5 8,645 06-20-2012, 11:48 AM
Last Post: kwwmackenzie
  Disk brake problem Stuttgartzerosix 1 3,772 06-20-2012, 01:49 AM
Last Post: RobAR

Forum Jump: