Box Two Race Freewheel Size:18T the 4mm wall thickness provides

the 4mm wall thickness provides extended grind life

22mm and 24mm crank spindles with 48-splines with the included adapter ring

It's built with a cast aluminium body and a forged 6061-T6 aluminium top plate with recessed sides and underneath sections to reduce weight

Using a high performance 120TPI casing and a specially designed dual compound tread that's smooth in the center but with plenty of outer tread for traction and control through carving and cornering

or Gloss Atomic Mint

Box Two Race Freewheel Size:18T the 4mm wall thickness providesTested extensively by the Dutch National BMX Team, Damien Godet, Kory Cook, and numerous other elite racers, Box Two Freewheels combine durability with lightning fast engagement. They feature nine, super durable pawls and are available in one of three choices 16, 17 or 18 teeth.