Progressive 944 Series Ultra Touring And Ultra Low Shocks For Harley The 944 Series shocks leverage Frequency Sensing Technology (F.s.t.) for real-time road condition responsiveness by dynamically adjusting compression and rebound, eliminating external adjustments. The 944 Ultra Touring shocks are redesigned for a striking appearance and superior performance, engineered to sit lower than stock H-D Touring models for unmatched ride quality. Available in Standard for up to 250 lbs, Heavy-Duty for 250-350 lbs, and Super Duty for weights above 350 lbs, these shocks cater to a broad range of rider weights, ensuring optimal performance for every rider. Features: Frequency Sensing Technology (Fst) allows the shocks to sense the frequency of a bump and automatically adjust damping for superior ride quality The Lowered 12 height option lowers the ride height 1 on most standard models and 0 on most stock lowered models The Ultra Low 11 height option lowers the ride height 2 on most standard models and 1 on most stock lowered models Adjust spring pre-load by hand, no special tool needed Progressive Rate Main springs specifically designed for Touring Models - this shock is not made for any other HD product Sold as a pair Made in the USA Notes: Shock lengths are measured as they sit installed on the bike, eyelet-to-eyelet on-center Changing ride height may change other attributes of your bike, including trail and mechanical trail A change in ride height at one end of the vehicle usually will require a change at the other end Prior to purchasing shocks that are different than your OEM length, please verify that wheel and suspension travel can be altered without causing clearance issues - common interference spots include swingarm, axle, frame, tire, fender, chain/belt and guard, and exhaust