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Diameter of Pistons Holes for Pistons and Holes for Shoulder Bolts on Dexter Brake Caliper BP18-045


Can you tell me what the bore diameter is for these calipers?


Helpful Expert Reply:

I went out to the warehouse and pulled caliper # BP18-045 to measure it. The overall diameter of the holes where the pistons are is 3 inches. The piston diameter is 2-3/8 inches. And the shoulder bolts are 5/8 inch diameter and 5 inches long so the holes will be slightly larger at 0.63 inches.

Since this caliper has a specific application, Dexter 10k and 12k disc brakes, I cannot gaurantee that it will work with any other system.

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