Enhance your bike’s performance with the Campagnolo Bottom Bracket Cups PRO-TECH - BSA (model OC21-PRG). Featuring innovative Pro-Tech™ technology, these cups incorporate a patented external sealing gasket that effectively protects the ball bearings from water, mud, and sand ingress. The watertight central sleeve, made from fiberglass-reinforced polyamide, ensures internal components stay contamination-free. Equipped with oversized stainless steel external bearings, press-fitted onto Ultra-Torque™ half-axles, these cups guarantee exceptional durability and smooth rotation. Compatible with a wide range of frames, including Ekar options, this bottom bracket system delivers optimal performance in all riding conditions.