The difference between an regular S-10 and a ZR-2: RPO ZR2 only full ladder-type frame with modified suspension mounting points which provide: 100mm wider track (3.9 inches wider than regular S-10). Three-inch suspension height increase. Enhanced front (7.25" ring gear) and rear (8.5" ring gear) axles w/ 3.73:1 rear-axle ratio. Larger wheel and axle bearings. 31 x 10.5R-15 LT/C black wall off-road tires (BFG A/Ts on pickups and BFG Long Trails on BlaZeR2). 46mm gas pressurized Bilstein Monotube shocks. Rear axle track bar (pickups) / rear sway bar (BlaZeR2). Wheel flares (black on S-10 pickups and BlaZeR2 / body-color on Sonoma pickups). 33mm (early model) / 28mm (late model) front anti-sway bar. Skid plates.