Pro Comp Nitro Kits are the economical alternative to a complete suspension system. They are designed to add larger aftermarket wheels and tires to your rig without installing a complete suspension lift kit. Leveling Lift Kit Pro Comp for Dodge Ram 1500 2009-2012 with 4WDfront lift height: 6cm,front lift method: two strut spacers,rear lift height: 2.5cm,rear lift method: two coil spring spacers,includes all necessary hardware and instructions,maximum tire size: 35", Note: Will not fit TRX4 model