Campagnolo ProTech bottom brackets feature a patented external sealing ring design that protects a strong, resilient fiberglass-charged polyamide central tube from the harmful ingress of water, mud and grit. Features: Designed specifically for gravel riding and racing to protect against water, mud & grit Specifications: Frame Interface: BB86 Spindle Interface: Campagnolo Ultra-Torque Bottom Bracket Shell ID: 41mm Shell Width: 86mm Color: Black Weight: -