3 replies to this topic

[GuyT]

hello All,

I am refurbing a Mini 30 for my daughter,
and i have a query.
Just completed fitting new rear subframe

I am now fitting new discs, and decided to fit new pistons and seals to the calipers.
the new pistons have a front edge with a slight rebate, is this normal
 IMG_20150116_133328.JPG   29.56K   14 downloads

This rebate is intentional but i dont understand why its needed,surely its going to reduce contact pressure on the pad.

thanks for your coments
GUY

[Dan]

Sort of but that's what it's for. It's meant to stop brake squeal. The cut away portion goes at the top of the caliper.

[GuyT]

Sort of but that's what it's for. It's meant to stop brake squeal. The cut away portion goes at the top of the caliper.

Hi Dan,

Thanks and you answered my second question too, cut away section fancing top of caliper

cheers
GUY

[Spider]

I am sure the cut out is to give even pad wear and the shims are so they don't squeal.