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STI Powersports Tires

STI Powersports designs and manufactures tires, wheels and tubes for off-road motorcycle owners, UTVs and ATVs. STI is led by veterans of the sports industry with a deep understanding of the needs of off-road enthusiasts. The company focuses on delivering excellent products backed by industry-leading customer service.

STI's goal is to design UTV tires and Utility ATV tires that break new ground, literally and in the innovative sense. From the R4 mudder to Roctane to Sand Drifter and more. They deliver performance to cover a variety of terrain. STI understands that durability is as essential as traction, and all STI tires use durable designs, whether you need 6-ply up to 10-ply. And they do it at prices you'll appreciate. Check out the specifics on each tire.

R4

A bigger, bolder and more extreme mud tire, the STI R4 is specifically designed and engineered for high-performance UTV and ATV applications. The 8-ply rated, tubeless radial carcass tire measures nine inches wide. The R4 features super-deep lugs - 1.75 inches at center and 2.0 inches at the shoulder - angled to optimize traction performance both forward and in reverse.

This mud tire is constructed for durability too, with a rubber compound built for abuse. The R4's deep rim guard protects your wheels as well. Other tires may look the same, but only the STI R4 enters the mud with lugs this deep and a carcass this strong - and at a comparatively low weight.

Roctane XD

With its 8-ply-rated radial carcass, the Roctane XD is built to confidently handle today's UTVs and ATVs, no matter how large, fast and aggressive they are. And with 10 different sizes, including the new super-tall 34-inch, plus 30- and 32-inch models, there is a Roctane XD for your UTV or ATV.

STI Roctane XD tires use a heavier denier nylon cord to maximize tire toughness while retaining flexibility for a comfortable ride. The Roctane’s unique, non-directional tread design and wide profile footprint deliver smooth, quiet operation and precise control. STI’s exclusive RocWall sidewall construction features reinforced lower sidewalls and extra-wide tread belts for added shoulder protection and stability. Add in super-deep RocGuard rim guards to protect even the thickest wheel lips from trail damage, and the result is the most reliable tire on the market.

STI Roctane XD deliver ideal grip on the slickest rocks, and with their tread size and design gives these tires exceptional traction in muddy conditions.

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