Avid Elixir R rock solid

A strange problem has just appeared with my rear Avid Elixir R. When I got the bike out the garage yesterday to go ride, the dead band on the rear brake was non-existent, I'd literally pull the lever and it'd bite. However, after riding it for a few minutes, it'd return to normal and the bite point would be the same as the front brake (set up how I like it). I noticed it appeared again once I'd left it for  a little bit on the train home, it'd be well too sharp. It's almost like the opposite of trapped air?

Any ideas? Thanks!

That sounds potentially like a sticking piston but you would get noticeable binding, is the brake binding when it starts and then disappearing?

By binding you mean rubbing/dragging? Nope, nothing, it's totally use-able. It's just pin sharp; imagine how Saints would feel if you used the Avid bleed procedure, like that, haha.

That is very odd, never come across this before sorry!

No worries. It's confusing me because it's the complete opposite of what you'd expect to happen.

No worries. It's confusing me because it's the complete opposite of what you'd expect to happen.

a touch too much fluid in the MC is your problem?

try reducing the fluid volume a little (crack the port on the MC with a torx, very gently squeeze lever and catch DOT in a rag / tissue, seal the port back up and wipe off any DOT with water or other suitable cleaner)

go ride, and see what happens//

be aware the open disc brake systems are affected by atmospheric pressure, which means when the weather changes a previously dialled bleed can end up having a touch too much volume, this can reset the timing port position without your input!

Good one for the mental diagnostic book londoner!

No worries. It's confusing me because it's the complete opposite of what you'd expect to happen.

a touch too much fluid in the MC is your problem?

try reducing the fluid volume a little (crack the port on the MC with a torx, very gently squeeze lever and catch DOT in a rag / tissue, seal the port back up and wipe off any DOT with water or other suitable cleaner)

go ride, and see what happens//

be aware the open disc brake systems are affected by atmospheric pressure, which means when the weather changes a previously dialled bleed can end up having a touch too much volume, this can reset the timing port position without your input!

I bled them maybe 6 months ago, maybe a little longer, they've been fine since, it's only very recently that this has started to happen. Maybe time for another bleed and see what happens. Odd though