Years and years of experience at the shop with hundreds of brakes. Especially the ones that were bled when the pads were half worn. That introduces more fluid into the system than the bladder can cope with. When you push the pistons back in on an overfilled system, you pop the bladder. On a brake where there was no mid pad life bleed, the issue is non existent, hence why its a non procedure for Shimano.
March 28, 2024, 11:44 a.m. - Deniz Merdano
Years and years of experience at the shop with hundreds of brakes. Especially the ones that were bled when the pads were half worn. That introduces more fluid into the system than the bladder can cope with. When you push the pistons back in on an overfilled system, you pop the bladder. On a brake where there was no mid pad life bleed, the issue is non existent, hence why its a non procedure for Shimano.