What causes a brake piston to retract, when you release?
What causes a brake piston to retract, when you release? Wikipedia says- " Because the "motor" is small, an uncommon feature of bicycle brakes is pads that retract to eliminate residual drag when the brake is released. In contrast, most other brakes drag the pads lightly when released ." huh? "because the motor is small"? Maybe thats' the size of the stroke? But how does that cause a pad to retract? Why is my sticky piston not sticking to my blocks? If you can see in the last picture I posted above, the redstone wire above the lever cannot be...