Lubing pistons decreases piston retraction. The piston requires a bit of friction with the seal to have the proper amount of retraction. Lubing the piston decreases the friction between the 2 parts, resulting in the piston sliding through the seal too much. This goes contrary to a lot of comments on forums. Conversely the opposite is true. Too much friction prevents the piston from slipping properly, resulting in a mushy/poor bleed feel at the lever.
March 12, 2021, 10:01 a.m. - JT
Lubing pistons decreases piston retraction. The piston requires a bit of friction with the seal to have the proper amount of retraction. Lubing the piston decreases the friction between the 2 parts, resulting in the piston sliding through the seal too much. This goes contrary to a lot of comments on forums. Conversely the opposite is true. Too much friction prevents the piston from slipping properly, resulting in a mushy/poor bleed feel at the lever.