Fulcrum Rapid Red Carbon Front Wheel - 700c 12 x 100mm Center-Lock Disc BLKFulcrum Rapid Red Carbon Front Wheel 700c 12 x 100mm Center Lock Disc Black. The Rapid Red family of wheels now boasts a set of wheels dedicated to those who want to discover new terrains and new trails with a touch of extra speed. Fulcrum applied the technological knowhow from their top of the range wheels to develop the reactive light and reliable Rapid Red Carbon for gravel. Full carbon gravel wheelset with Direct Inmold Matt Finish (DIMF) S Shape