SuperATV Can Am Defender HD8 High Clear 2" Offset A Arms Add Preinstalled Ball Joints?:Heavy Duty 4340 Mudder KitDesigned for mud riding Terrabite 27x9 12 Mudder KitDesigned for mud riding with aggressive lug tiresHelps restore power loss due to addition of mud tiresBetter low end power and torque to get tires turning in the mudQuicker backshift which results in crisp throttle responseReduced belt slip and clutch heat Sand Dune KitDesigned and tested specifically for sand dune applicationsDifferent kits for stock and paddle tiresHelps hold peak power RPM when dune riding and climbing hillsBetter low end power and torqueQuicker backshift which results in crisp throttle responseReduces belt slip and clutch heat Rock Crawler KitDesigned and tested specifically for rock crawling applicationsCalibrated to provide a low engagement rpm to support technical maneuversAdded belt squeeze to eliminate belt slipSlow shifting phase that provides a smooth rock crawling technical driving experienceFor low mid range speeds only From the materials to the design You save money and time it gives you a longer wheelbase for more stability