Brake piston ‘cap’
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Senior User
Joined: Oct 2007
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Brake piston ‘cap’
Piston ‘cap’
I replaced my front pads and on the rim of the pistons there is a metal cap. One is damaged so I pried it off. It came off easily. I installed the brakes without it. I’m wondering why it’s there and if it’s really necessary. The brakes seem fine without it. If necessary, can it be purchased separately? Thanks!
Last edited by nlfireblade; Nov 21, 2018 at 12:56 AM. Reason: add photo
Elder User
Joined: Aug 2011
Posts: 858
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From: Chico,CA.
I think the pistons are made of a phenolic resin and the caps are to reduce abrasion/wear to the pistons, as the pads slightly chatter around when not applied. Realistically, In the life of the caliper, I don't think you'd see any appreciable wear. Maybe after a few thousand miles, pull that caliper and have a look? If it were me, and it bothered me (which it doesn't) I'd just replace the entire caliper.
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