35-inch Trail Tamer

STI introduces the Roctane XR with a 35-inch trail-tamer tire made for 18-inch wheels (like the all-new STI HD9 18-inch). With its 9.5-inch wide sizing and new 8-ply rated carcass, the Roctane XR delivers lightweight, all-terrain performance at a great price.  

Starting with the original Roctane XD, STI re-imagined a lighter, all-terrain, trail-oriented tire to make the new Roctane XR. By adding dimples and grooves to the familiar tread pattern, STI increased the biting edges available through the XR’s main contact surface. With its superior traction and precise handling, the Roctane XR sets a higher standard for all-terrain performance in the 35-inch tire game. 


  1. 9.5 inch profile.
  2. 8-ply rated, durable, traction monster.
  3. Designed for premium handling and light weight.
  4. Multi-angle tread blocks with dimples and ample biting edges.


Sizes & Specs

Roctane XR
SIZEPLY RATINGOVERALL DIAMETER (Inches)TREAD DEPTH (Inches)MAX PSIMAX LOAD CAPACITY @ 18 PSITIRE WEIGHT (Pounds)PART #
35 / 9.5-18835.00.818.01371 lbs.42.9209-1949
See vehicle label or owners manual for operating pressure

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