Self-service packaged, square taper (12.73 mm), BSA thread 1.375" x 24, 68 mm shell width, compatible with Gates CDN belt drive, durable, maintenance-free, weather-resistant. Left bearing cup with functional shoulder (FS), axle made of specially hardened material (ML-treatment), Certification: ISO 4210-8 (MTB). Optimized rotational quality due to double-sealed deep groove ball bearings, galvanized steel sleeve (Ø 27 mm) to protect the bottom bracket and especially suitable for cable passage. Bearing cup made of Composite A, incl. 2 hexagon socket screws with polyamide patch coating and clips-ring, Installation note: Tightening torque cup: 25-30 Nm (installation without grease); Tightening torque screws: 42-45 Nm, Made in Germany Axle length 120.0 mm Axle standard ISO Type Article Version Square taper Main color black Bearing type Industrial bearing Secondary color silver Bottom bracket standard BSA Bottom bracket shell width 68 mm