When you want to get serious, H&R Sport Springs are the hot setup. These are our most popular springs - they lower your machine an average of 1.5 - 2.0 inches (depending on make and model) for improved handling, better aerodynamics and a simply outrageous look. Each spring is tuned for that elusive combination of shifter-kart handling and a controlled, yet comfortable ride (about 25-30% stiffer than stock).