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Extreme Duty ATV/UTV Tires, Series IVRP SOF Series IV Tires | USA

RP SOF Series IV Tires | USA


DOT Certified. Run-flat. Powerful. The SOF Series IV USA Tire is the US end product tire with the aggressive design to get the job done – no matter what.


Inflated or defalted, rely on the SOF Series IV USA tire, specifically constructed to keep you moving. This high load, high performance run-flat UTV tire offers an aggressive desert stylized multi-directional tread pattern. Specifically designed and engineered for heavier payloads, wheel protection, and survivability, the SOF Series IV USA tire is the ideal solution for operation in harsh areas comprised of ironwood, shale and other obstacles.

Features Include:

  • Lightweight 8 & 12-PLY rating
  • Improves acceleration without sacrificing engine output
  • Up to 1200+ lb load rating for the 12PR variant
  • UTV 12-PLY run-flat
  • Focused design for 50 miles at 40 mph devoid of air at 450 lb per tire load
  • Universal sizes 27x9x14 & 27x11x14 UTV

The load limit refers to the load-carrying capacity of a RP tire under optimal conditions and when mated to an equivalent rated wheel. When properly matched and properly installed, it indicates how much weight a tire can support. For example, if a RP tire has a load limit 900 pound, it can support 900 pounds at maximum rated air pressure, installed properly on equal or greater rated wheel (typically a Beadlock). In most cases, the tire rating does not increase vehicle payload without careful consideration of established vehicle limits or engineering analysis. Always consult with OEM or refer to OEM data.

Highway only use vehicles use tires with speed ratings that must be specified, and fitted, to exceed the maximum speed of the vehicle they are mounted on, with regards to their established speed rating code. The RP series tires are designed and tested to similarly establish the speed a tire can carry a load corresponding to its Load Limits. Certain RP tires are also constructed to DOT certification standards and can perform on highways within limits of design. But it should always be noted the RP line of tires are intended for off-highway use only on UTV/RGV/ATV and similar vehicles. Off highway use vehicles are limited by design for highway operations and strict adherence to your local and federal laws must be considered when using RP tires on vehicles used on highways/roadways.

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