The Hard Front Spring Set allows for a firmer suspension feel. The three included springs are only separated by .3 lbs/in increments allowing for very fine tuning to get your TLR Truck dialed in. These firmer springs reduce the roll rate of the front end of the truck, keeping it flatter and allowing it to transition from left-to-right more quickly.
Springs included in order from softest to stiffest:
Purple 4.4 lbs./in
Brown 4.7 lbs./in
Light Blue 5.0 lbs./in