Posted by: T-mack
Posted by: heathen
Posted by: RAHrider
Posted by: Vikb
Posted by: heathen
What are these mystical creatures?
Does anyone know if the shimano wandering bite point is solved by replacing the caliper with a magura?
That was my exact thought when I saw it.
All a caliper is mechanically is a piston that slides inside a square profile O-ring. The retraction is just the O-ring going from a Parellolgram back to square which pulls the pistons back inside the caliper. The wandering bite point couldn't really be anything to do with the caliper. My theory is that when you bleed a shimano system, you push fluid up the system into the cup on the master, well you're essentially taking all of that grime from the caliper and pushing it back through the system which gums up the seals in the lever body. I bet the spring is trying to push the plunger back when you release the lever but the seals are slow to move so when you go pull again, the pads are still closer to the rotor than they should be causing inconsistent feel.
The 'official' shimano bleed is top down, so the gunge is more likely to collect in the caliper.
I've heard the theory that the servo-wave amplifies any bubble issues, as the lever has to move further. But the m9000 race lever mentioned doesn't have it, so no more clever thoughts.