i just got them installed and what a differene in the sag it made. with my old springs on the highest setting the sled would sag 5-6 inches with me on it. now on the lowest setting it only sags 2". unfortunatly we still have no snow this winter, so i have to wait to make it up to the hill again to try it out. i also have the cudney x paCKAGE SHOCKS AND CRANKED UP MY FRONT SKID SHOCK TO OVER 3/4. hopefully this will get the weight off the front end. i also installed my tra iii arms. i ran it across the grass and they deffinatly make a difference but again i have to wait to get back up to the hill to see where my rpms are at.