N3 Rear Shocks | 0-3.5" | Toyota Tundra 2WD/4WD (2007-2021) Improve your on and off-road ride quality with Rough Country 's premium N3 shocks! These 10-stage variable valving, high-pressure Nitrogen charged shocks offer a fantastic blend of off-road action and smooth highway ride quality. With a durable 18mm spring-loaded piston rod and faster-cooling 54mm shock body, this shock offers up to 36kN Tensile Strength for a long lifespan of impressive vibration dampening. Features natural rubber bushings and an eye-catching metallic silver paint. 23312_A