Compatible with all bikes adhering to Italian Standard bottom bracket shells. Right hand threaded for both shells, 36mm x 24 threads per inch. Machined aluminum cups thread in to a standard Italian threaded frame and feature ABEC-3 sealed bearings outboard of the BB shell. Fully serviceable. Bottom Bracket Includes: BB Cups with bearings 2 - Silicone dust seals 2 - 0.5mm crank spindle spacers 2 - 1.0mm crank spindle spacers 1 - 2.5mm crank spindle spacer