This is a set of optional Kyosho 85mm "Red" Big Bore Rear Shock Springs, and are intended for use with the Kyosho MP9 and MP10 1/8 scale buggies. These 85mm long rear springs are recommended for rough tracks, or tracks with big jumps. These springs are made with 1.5 diameter wire and are more durable than the standard 1.4mm springs. Red is the medium rate spring in the 1.5 wire 85mm spring lineup.
NOTE: These springs must be used with the KYOIS215 58mm medium length shocks, and KYOIFW624 rear shock tower.