Box One Oversized B52 Bottom Bracket - Black 49mm Large diamond shaped side knobs

Large diamond shaped side knobs deliver the grip you need in corners and large bowl turns

Volume: 63

with a metal to metal Echo-designed locking feature that requires pressure from BOTH sides to release

Rear Shifter: Shimano 3-Speed Revo Twist Shifter

this hub blends strength

Box One Oversized B52 Bottom Bracket - Black 49mm Large diamond shaped side knobsTraditional BBs lack the space necessary for the pedal stiffness you deserve; that's why Box designed the B52 Bottom Bracket to bring Oversized Technology into your bike frame, breaking the mold in the bike builder's world. With a 52mm x 80mm wide BB shell, your bike gains wider chainstays, enhancing efficiency during cornering and acceleration. Your power delivery becomes more efficient, and feedback becomes more responsive. In summary, you'll need