Extreme-Duty - Biggest in Class

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 a dozen different sizes, including the new super-tall 34-inch, plus 30- and 32-inch models, there is a Roctane XD for your machine.

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. Even with the all-conditions performance of these Roctane XDs, they're still reasonably priced.

More Info



  1. Non-directional tread design for smooth and precise control
  2. RocWall sidewall construction adds shoulder protection
  3. RocGuard rim guard protects wheels from trail damage
  4. 8-ply rated radial carcass


Sizes & Specs:

Roctane XD
SIZEPLY RATINGOVERALL DIAMETER (Inches)TREAD DEPTH (Inches)MAX PSIMAX LOAD CAPACITY @ 18 PSITIRE WEIGHT (Pounds)PART #
25 / 8R-12825.10.818696 lbs.23.1001-1101
25 / 10R-12825.30.818855 lbs.25.5001-1102
26 / 9R-12826.20.818828 lbs.28.3001-1103
26 / 11R-12826.50.818996 lbs.34.8001-1104
26 / 9R-14826.20.818801 lbs.28.1001-1121
26 / 11R-14826.50.818966 lbs.30.3001-1122
27 / 9R-14827.20.818849 lbs.28.6001-1123
27 / 11R-14827.50.8181,041 lbs.31.9001-1124
28 / 10R-14828.30.8181,002 lbs.37.3001-1125
30 / 10R-14830.40.8181,134 lbs.42.4001-1127
32 / 10R-14832.31.0181,293 lbs.53.3001-1129
34 / 10R-15834.01.0181,350 lbs.56.0001-1148
See vehicle label or owners manual for operating pressure

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