Wheels Manufacturing T47A Bottom Bracket - For 29mm Spindle Apparel_Eyewear and DT Swiss XM1700 wheels

and DT Swiss XM1700 wheels

most durable triple bearing system

Rear zippered security pocket

Cylindrical base-6 shield lens interchangeable - large Field of Vision

Two air vent ducts

Wheels Manufacturing T47A Bottom Bracket - For 29mm Spindle Apparel_Eyewear and DT Swiss XM1700 wheelsWheels Mfg. T47A(asymmetrical) bottom brackets feature thread together machined aluminum cups and internal Enduro ABEC 3 bearings. For use in Cervelo, Factor and Felt frames with T47A bottom bracket frame interface Bearings are easily serviced or replaced Includes sleeve to fit between cups for added protection from dirt and grime Machined aluminum cups are durable and lightweight For use with 29mm crank spindles