ADJUSTABLE REAR SHOCK HONDA XR50 CRF50 50CC 70CC 90CC 110CC 125CC PIT DIRT BIKE THIS LISTING IS FOR ONE SHOCK. EYE TO EYE LENHTH: 10.5 TOTAL LENGTH: 11.50 SPRING THICKNESS 10MM (SUITABLE FOR HEAVY RIDERS 200 - 250LB.) SPRING DIAMETER: 2.5 MOUNTING HOLE DIAMETER 10mm WIDTH OF MOUNTS : 3/4 THIS IS A STIFFER HEAVY COIL SPRING SHOCK SUITABLE FOR RIDERS OVER 200LB. PLEASE CHECK SPECS. FOR FITMENT.