Box Three Expert Disc Rear Hub-Black skualt--131792-150692 and a BMX race-specific tread

and a BMX race-specific tread pattern designed to maximize traction out of the gate and around turns

The Gordo includes green pads and green low-profile adjusters

1-1/8" threadless

The Park Tool BBT-18 Bottom Bracket Tool has 8 notches with an outside diameter of nominally 43

Box Three Expert Disc Rear Hub-Black skualt--131792-150692 and a BMX race-specific treadThe Box Three Expert Disc Rear Hub Black at J&R Bicycles is a slimmed down lighter version of the Pro hub that is perfect for smaller sized riders. Made with a 4 pawl system with 120 points of engagement and precision sealed bearings, the Expert Disc Rear Hub offers rapid engagement for super speedy power gain. To maintain the lightweight design, Box made this hub with aluminum alloy axles, reduced hubshell size and lighter hardware and polished it