Progressive 944 Series Quik Preload Ultra Shocks For Harley Touring The Progressive Suspension 944 Ultra Touring and 944 Ultra Low shocks introduce the innovative Quik Preload System (Qps), revolutionizing preload adjustment on Harley-Davidson Touring models. This advancement eliminates the need to remove saddlebags for sag adjustment, catering to various riding configurations from solo to fully loaded. The integration of Frequency Sensing Technology (Fst) ensures an optimal riding experience by dynamically adapting to terrain changes, offering a seamless setup in under a minute. Features: Frequency Sensing Technology (Fst) allows the shocks to sense the frequency of a bump and automatically adjust damping for superior ride quality Sealed gear driven preload adjuster with 17mm of adjustment Adjust spring preload in seconds without removing saddlebags 30 complete turns of preload fine adjustment Adjusts with 8mm socket wrench (not included) Progressive Rate Main springs specifically designed for touring Ultra Touring 13 option lowers the ride height 1 on most standard models and 0 on most stock lowered models Ultra Low 12.5 option lowers the ride height 2 on most standard models and 1 on most stock lowered models Available in Standard, Heavy Duty, or Super Heavy Duty Lifetime Limited Warranty Sold as a pair Made in 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