Bicycle Bottom Bracket Quare Hole Axis Bike Parts for Square Tapered Spindle Crank

Features: 1. The bottom bracket is solid and durable with a long service time. 2. The steel shell can absorb roundness tolerance for installing ports of Bracket Bottom. 3. Integrated System can protect the frame, more power output, it's better than ordinary structure bottom bracket. 4. Suitable for 68mm frame shell. 5. Please use the BB tool to install and replace the bottom bracket for safety. Specification : Suitable: for 68mm Frame Shell Weight: about 316g/11.15oz Size: about 68 * 118/120/122.5/124.5/127.5mm Cups thread size and pitch: 34.798mm 1.37*24TPI Structure: 2 Bearings Package List : 1 * Quare Hole Axis 2 * Screws