These are the best pair of steel air shocks you can get for your bike. These are the standard steel air shocks included in DIRTY AIR suspension systems. 9.25" fully collapsed, 13.25" fully extended (measured bolt-center to bolt-center). Designed and valved for Harley-Davidson touring models, offering a wide range of comfortable travel at lower pressure than previous versions. Will not cause exhaust pipes to touch axle nut or shock bolts when lifted to max height. Uses stock bolts and washers. Shocks have high-quality nickel-plated brass push to connect air fittings, select your tubing size.