This is on the back brake of a set of OEM Ultimate 7’s of a spesh bike. So I think it is an ultimate caliper with a 7 lever. Not sure if that makes a difference but it might.

Anyway…. the problem is that the pistons are not retacting very much at all so that even when the brake is “off” the rotor is dragging. There is no visable gap between the pads and the rotor.

There is a pad contact adjustment lever – this is currently wound all the way in (so it might be the problem) but last night tried unwounding it and nothing seemed to happen and I never reached a “stop” on unwinding.

If I push the pads apart the go back into the caliper body easily and I’ve tried to clean both pistons so I don’t think they are corroded. Pull the lever and they both move easily they just don’t go back apart quite enough….

Any suggestions appreciated.

too much fluid maybe?

I had a newish Juicy 5 replaced under warranty for this problem. The pistons just would not retract when the lever was left off, to the point where it became virtually ON even with lever off. No matter what was done could’t correct the fault even though you could physically push pistons back. As soon as brake was applied pistons refused to return to OFF.

Back to your dealer?

Sounds like it might be a back to dealer job. One of reasons for asking was to see if it was a common problem…

I’m not sure it is too much fluid as when I push the pistons back it takes a couple of pumps for the pistons to come out again so I think there is enough space in the system.

try some teflon spray on the pistons, in case they are sticking

otherwise get tem back to the shop

Bleed em, could be air in the calipers. It was on my ELixirs, same problem.

Dodgy seal in the lever..?

Sounds pretty familiar on both my sets of Avid’s…..

ononeorange – Does that mean you have a neat solution ….. 😕

No sadly. I look upon it as a training opportunity….!