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PM 4 Piston Caliper 137x4 DBO (Direct Bolt On)

PM 4 Piston Caliper 137x4 DBO (Direct Bolt On)

These calipers feature four pistons with two different piston diameters. The differential bore size compensates for uneven pad wear. It has integrated mounting brackets which directly bolt (= DBO) to 1984–up front ends, except on models with narrow fork and laced wheel.