Once you get tires that are 28? and larger, the diameter and rotating weight has a much more negative effect, and this kit is designed to minimize the losses from those tires and get back some of that power. Provides better bottom end power and response as well as improved back shifting of the belt in load situations like hills and soft terrain.
Not for use with stock ? 27? tires
570 Outlander / Renegade with smaller than 28" tires use see part number DPPS-TN
Factory belt is the best belt for this vehicle, and testing is calibrated to that belt.