High performance at a lower price! You have the performance of a self adjusting shock. Preload is adjustable with a spanner tool (included). These shocks are a perfect fit for your application. You'll have a shock that enhances your scooter and provides you with better performanceAll Y.S.S. shocks are easy to fit and come with different features like adjustable compression, remote reservoirs, Teflon coated sinter bushes or the revolutionary bladder rebound technology. Ride height adjusters, hydraulic spring tension preloaders and hard chrome plated shafts are other features throughout the vast Y.S.S. shock absorber range.