Specifications: Condition:100% Brand New BB/Frame Interface: English Material: Aluminum Alloy Bowl + Plastic Tube Color: Titanium Color + Clear Spacer: No Spacer Bottom Bracket Diameter: 41mm Installation Method: Press-in Frame Bottom Bracket Width: 86.5mm Crankshaft Core Size: 24-24mm Net Weight: About 100g Gross Weight: About 130g Feature: Fits 86.5mm frame bottom bracket shells. What is a ceramic center shaft? The ceramic center shaft is a ball bearing in a sealed bearing, made of black silicon nitride ceramic (Si3N4) .
