Campagnolo Pro-Tech External Bottom Bracket Cups Black

The Campagnolo Pro-Tech external bottom bracket cups form a threaded bottom bracket for anyone using an Ultra-Torque axle crankset on a road or gravel bike. Choose the English or Italian version to suit your frame.

• Glass-fibre-reinforced polyamide central tube
• Patented external sealing ring, a detail found only on this model
• For Campagnolo Ultra-Torque axles, for gravel and racing use
• Bearings not included: must be purchased separately
• How to choose: English for a 68 or 73 mm shell, Italian for a 70 mm shell

Technical specifications

• Model (MPN): OC21-PRG (English); OC21-PRI (Italian)
• Bottom bracket shell width: 68 and 73 mm (English); 70 mm (Italian)
• Thread: English; Italian
• Crankset axle: Campagnolo Ultra-Torque
• Material: glass-fibre-reinforced polyamide central tube; patented external sealing ring
• Colour: Black
• Use: gravel and racing
• Bearings: not included
• Variants: English; Italian

Founded in Vicenza in 1933 by Tullio Campagnolo, Campagnolo is still based in the Italian city and makes groupsets and wheels for road and gravel bikes. Its history also includes the wheel quick release, a mechanism the company refined to allow the wheel to be removed without tools.