Sticking Rear 105 brake, or brake lever, whats at fault??
Hi all,
On my rear brake whenever I brake the brake arm with the Shimano 105 writing on (does the right hand side) never returns to its start point & quite often as it doesn't ends up continually rubbing on the rim.
Been doing it for a while now. Was tempted to replace the cable but I would have thought the "spring back" element should be from the brake itself? Plus if I pinch the brake blocks on the rim the right side doesn't seem to return to the original starting point thus removing the action of the cable at all.
So guess based on the above it probably isnt the brake lever either.
In normal position:
Once I have braked it then holds this position:
If I go to brake for a second time then there is no tension in the brake lever, i.e a little bit of travel & then it decides to actually move the brakes.
Have taken everything apart & greased etc when it should be & no result at all!!!
On my rear brake whenever I brake the brake arm with the Shimano 105 writing on (does the right hand side) never returns to its start point & quite often as it doesn't ends up continually rubbing on the rim.
Been doing it for a while now. Was tempted to replace the cable but I would have thought the "spring back" element should be from the brake itself? Plus if I pinch the brake blocks on the rim the right side doesn't seem to return to the original starting point thus removing the action of the cable at all.
So guess based on the above it probably isnt the brake lever either.
In normal position:
Once I have braked it then holds this position:
If I go to brake for a second time then there is no tension in the brake lever, i.e a little bit of travel & then it decides to actually move the brakes.
Have taken everything apart & greased etc when it should be & no result at all!!!
0
Comments
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My first thought was that the return spring was fouled up or corroded in some way so that it was not working effectively to open the caliper after you release the brake lever. However if, as you indicate, you have dismantled the brake and cleaned and greased it then that option is out.
Only other explanation is that your brake inner cable is fouling somewhere along its length. Either due to a sharp bend in the outer or due to some fraying of the inner within the shifter housing or elsewhere along the cable.
I would suggest replacing the inner cable and also checking the cable routing to make sure it is not being snagged at a bend (eg on the handlebars)0 -
Nope, just changed the cable & still the same.
I suppose the question is what makes the arm with the right pad on spring back as that's where the problem seems to be.0 -
Have you tried cleaning with WD40 and then drying, plus checking how easily the cable inner moves ?
Disconnect cable from caliper, take off wheel and check/clean.
Greasing itself will not clear, if the caliper is suffering from extra friction caused by mud/grit/salt etc.All the gear, but no idea...0 -
The whole thing has been split into every single separate part & cleaned.
Just remove the brake set up from the frame & loosened off the nut the that sits against the frame & now ok, although the whole brake set up can potentially move from side to side a bit now. Will use it on the commute in the morn & see how it is in the real world, all ok the stand at the mo!0
