Ironman All Country Mud-Terrain Tire (37" - 37x13.50R20)Find parts that fit my vehicle

Tough Tires for Tough Trucks. When the road ahead looks impossible to pass, you can count on Ironman's All Country Mudd Terrain Tires to get you going, no matter what the path looks like.

Made For All Seasons. The Ironman All Country Mud-Terrain Tire is specifically designed to cater to all seasons - Ironman makes sure you can keep trucking through sun, storm, or snow.

Studdable Treads. The Ironman All Country Mud-Terrain Tire comes with studded tire treads that provide greater soil grip and add a little more "bite" to compliment your throttle's "bark".

Silt and Sand Efficient. Wet silt and sand don't stand a chance to the unique debris-ejecting linings of the Ironman All Country Mud-Terrain Tire. Don't worry about getting stuck in a slippery situation with these bad boys installed.

Impervious Rubber Foundation. Ironman All Country Mud-Terrain Tires are made to have puncture-proof treads and triple-ply sidewalls that resist slashing and cutting, making it an impenetrable piece of American all-terrain engineering.

Warranty. Each Ironman All Country Mud-Terrain Tire is backed by Ironman's 60-month item warranty that covers any manufacturing or material defects or damages.

Installation. This product does not require professional installation and comes with all the necessary installation hardware, roughly taking 30 minutes to fully install.

Application. Ironman All Country Mud-Terrain Tire is compatible with hybrid-terrain vehicles.

What is the best gear ratio to run for larger tires? When you increase the diameter of your tires, your vehicle's engine has to work harder to turn them. Naturally, this will lead to increased fuel consumption and reduced performance. So, when upgrading to a set of larger tires you should re-gear your rig to regain this lost acceleration, performance and fuel economy.

Find your original tire size and gear ratio using the chart listed below, the intersection should be your approximate RPMs at 65 MPH. Then find your new tire size and follow it across to the closest RPM to your original tires, this will be your gear ratio choice.

This chart is based on driving at 65 MPH with a 1:1 gear ratio and a manual transmission in 4th gear. Please note if your vehicle is equipped with an automatic transmission your RPMs will be higher due to normal transmission and the torque converter slippage. In overdrive your RPMs will be approximately 15% to 30% less than indicated.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov