Wheels Manufacturing BB30A Outboard Bottom Bracket 24mm cranks Shimano Angular Contact Bearings BLK Valve-Presta Long 56-74mm 5 Lower Tubes Material Magnesium

5 Lower Tubes Material Magnesium Maximum Tire Width 81mm Primary Color Red Steerer Tube Material Aluminum

Prevents punctures

Hip belt pockets

super-sharp steel for perfect traction on even the hardest

Wheels Manufacturing BB30A Outboard Bottom Bracket 24mm cranks Shimano Angular Contact Bearings BLK Valve-Presta Long 56-74mm 5 Lower Tubes Material MagnesiumWheels Manufacturing BB30A Outboard Bottom Bracket for 24mm cranks (Shimano) with Angular Contact Bearings Black. Machined aluminum shell threads together for precise bearing alignment and frame fit reducing bottom bracket creaking and premature bearing wear. Replaceable Enduro bearings Made in the USA TECH SPECS Bottom Bracket Shell I. D. 42 BB Frame Interface BB30a BB Shell Width (mm) 73 Weight 119 Spindle Interface Type Shimano Hollowtech II