Box Two M30-P Race CranksetThe Box Two M30 P Cranks have been designed and built around their super stiff, cold forged Praxis M30 spindle. It fits frames with European bottom brackets. Paired with the same oversized, hollow forged arms and 104 BCD spider as the Box One M35 Cranks. After an independent lab test the Box One M35 and Box Two M30 came out on top in terms of stiffness compared to anything else on the market. The Box Crankset includes a Praxis M30 BSA threaded bottom