This shock is a 13 1/4" shock that fits HD Sportster And FXR Model (90 and Above) This is Ohlins Blackline mid level shock. It is a single-tube dividing piston pressurizing system (gas & oil do not mix) shock. This shock has pre-load and damping adjustability and the rider can also adjust the ride height by +/- 3/8 of an inch. Factory length for Sportster XL883 & XL1200 are 11 3/8". This shock does NOT fit the XR1200.