◌Fox Suspension Steel 2.8" Travel Rear Shock SpringFeaturing a hard-wearing steel construction, this mountain bike (MTB) rear shock spring offers durable and reliable performance as you conquer every trail-riding adventure. All standard steel springs are black and are marked with their spring rate in lbs/in (in 50lb increments) and the total travel of the spring itself. Standard black springs should only be paired with shocks having less travel than the travel marked on the spring itself. Features: Material: Steel Use: MTB Type: Rear Shock Spring Spring Travel: 2.8" Inner Diameter: 1.385 inches (35mm) Compatibility: All Fox coil rear shocks Size: Multiple options available to selectManufacturer’s Part Numbers: 039-00-600 Black 550lb 039-03-001 Black 350lb 039-03-002 Black 400lb 039-03-003 Black 450lb 039-03-004 Black 500lb 039-03-010 Black 700lbBuy Fox Suspension Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.