Overview
The Interco IROK is the direct result of many years of research and development by the Offroad Tires tire gurus at Interco Tire.  Interco IROKs feature scooped lugs, blade and molded siping, special side-wall features, extra tough cord and cut resistant compounds, and have a distinctive, directional tread pattern that incorporates the legendary Interco patented Three Stage Lug (TSL) design. 
IROKs delivers traction thats as good as it can get in snow, mud, and on the rocks. 
Interco IROKs are D.O.T. approved tires and come in both bias ply and radial versions. IROKs offer, an on road ride that is extremely smooth, and deliver lower than expected road noise for a tire this aggressive. IROKs are both stylish and function. IROKs are available in close to 50 combined various size combinations, including four (4) non-D.O.T. approved,  Offroad Tires and competition use only Sticky sizes.
Details:
- Tire Size  49x21/16.5LT 
 - Tread Width  16.5 
 - Tread Depth  28/32 
 - Tread Ply  6 
 - Side Wall Ply  4 
 - Side Wall lettering  BSW 
 - Minimum Suggested Rim Width  14 
 - Maximum Suggested Rim Width  14
 - O.D.  49 
 - Revs/Mile  220 
 - Max PSI  25 
 - Max Load  3640 
 - DOT Approved  Yes 
 - Aspect Ratio  49 
 - C.S.  20.8 
 - Tire Type  Bias 
 - Section Width  21 
 - Rim Diameter  16.5