Fox Steel Rear Spring - 2. 0"-2. 5" Stroke If you bottom out your shock every time you get airborne, you may need a spring with a higher spring rate. If you have a hard time getting through your shock's travel, you may need a spring with a lower spring rate. This coil spring is for use on Fox DHX/DHX2 or Fox VAN rear shocks. Features Compatibility: Fox DHX/DHX2 or VAN Rear Shock | Fox Racing Shox | Steel Rear Spring - 2. 0"-2. 5" Stroke 803-04-130 - 250 Lbs/in, 2. 500 Travel