Quote:
Originally Posted by merckx
One of the pinch-points on the BR650 brakes is the plastic insert that the return spring slips into on the brake arm. It protrudes into the side of the tire. You can see it in the above picture on the left just above the protective black tape on the brake arm.
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Yes, that black plastic piece is there on all Shimano mid-reach breaks AFAIK — it’s an odd design choice. In looking at it, I believe the protruding corner could be filed down such that it doesn’t limit tire clearance without affecting its retention of the spring leg.