Threaded Bike Bottom Bracket, Black/Red/Blue/Purple/Green/Gold/Dazzle BB91 68/73mm MTB Integral Sealed Steel Bearing Bottom, Bracket for 22-24mm Spindle Crank - Used
Aluminum Frame: Aluminum alloy frame is used in the bicycle central axle, which is smooth to pedal, non-slip, reduces noise, lightweight, and maintains strength at the same time. The bike center column is precision machined for excellent stability.
Integral Sealed Steel Bearing: The bicycle center shaft adopts integral sealing to keep the lubricating oil in the bearing, prolonging the service life of the bearing, with good waterproof effect, suitable for harsh riding environment.