DT Swiss F 1900 Classic Rear Wheel 27.5" 12 x 148mm 6 Bolt XD Ratchet LN 18 BLK MFPN=100963 BH00 03 The patented ratchet action closure and The patented ratchet action closure and speed release clamp of the Pro Elite Clamp is capable of managing any bike frame up to 85lbs (39kg) and tube diameter up to 2 Studies have shown that this combination of motion and light can make you up to 57% more visible than standard bike lights With a new rim based on the latest generation of Downhill rim design coupled with the tried and true ratchet hub the F 1900 wheel aims to take the beating of numerous bike park laps list style position:outside