The Wheels Mfg Italian DUB ABEC-3 Bottom Bracket is compatible with all bikes adhering to Italian Standard bottom bracket shells. It’s made right hand threaded for both shells with 36mm x 24 threads per inch. The machined aluminum cups thread in to a standard Italian threaded frame and feature ABEC-3 sealed bearings outboard of the BB shell. And like all Wheels Mfg BBs it’s fully serviceable.