Maximum Recommended Tire Sizes for Various Axles

*For highway and moderate off-pavement use, stock engine. Equipment in good condition is presumed. If you don’t see it here, it’s probably not a popular unit. This was compiled via conversations with assorted industry experts, not from scientific study, so use it as a general guideline only.

AM General

• AMC-20 IS 38 inches

Chrysler Corporate

• AMC-20 (older Jeep), rear 33 inches
• 8.25 inch rear, 27-spline 31 inches
• 8.25 inch rear, 28-spline 33 inches
• 8.75 inch rear 35 inches
• 9.25 inch rear 35 inches

Dana

• Dana 23 rear 31 inches
• Dana 25 front 31 inches
• Dana 27 rear 31 inches
• Dana 28 IFS 31 inches
• Dana 30 front, low-pinion 31 inches
• Dana 30 front, high-pinion, small u-joint 31 inches
• Dana 30 front, high-pinion, big u-joint 35 inches
• Dana 30 rear 31 inches
• Dana 35 IFS 33 inches
• Dana 35 rear 31 inches
• Dana 44 IFS 35 inches
• Dana 44 front, small u-joint 31 inches
• Dana 44 front, big u-joint 35 inches
• Dana 44 rear 35 inches
• Dana 50 IFS 38 inches
• Dana 60 front 38 inches
• Dana 60 rear, semi-float, 30-spline 35 inches
• Dana 60 rear, full-float, 30-spline 36 inches
• Dana 60 rear, semi-float, 35-spline 38 inches
• Dana 60 rear, full-float, 35-spline 38 inches
• Dana 70 rear 44 inches

Ford Corporate

• 7.5-inch rear, 28-spline 33 inches
• 9-inch, 28-spline 33 inches
• 9-inch, 31-spline 35 inches
• 8.8-inch, 28-spline 33 inches
• 8.8-inch, 31-spline 35 inches
• 10.25-inch, semi-float 38 inches
• 10.25-inch, full-float 44 inches

General Motors Corporate

• 7.25-inch IFS 30 inches
• 8.25-inch IFS 31 inches
• 9.25-inch IFS 33 inches
• 10-bolt front 35 inches
• 7.5-inch rear 31 inches
• 7.83-inch rear 33 inches
• 10-bolt rear, 28-spline 33 inches
• 10-bolt rear, 30-spline 35 inches
• 12-bolt rear 35 inches
• 14-bolt rear, semi-float 38 inches
• 14-bolt rear, full-float 44 inches

Isuzu

• 8-inch rear, 17-spline (early trooper) 31 inches
• 8-inch rear, 26-spline (late trooper, Amigo) 33 inches

Land Rover Corporate

• 8.5-inch, 10-spline, front or rear 31 inches
• 8.5-inch, 24-spline, front or rear 33 inches
• 9.25-inch, 24-spline (Salisbury) 33 inches

Mitsubishi

• Front IFS 30 inches
• Rear (small ring gear) 31 inches
• Rear (big ring gear) 33 inches

Nissan

• Front IFS (early) 30 inches
• Front IFS (late) 31 inches
• Rear, 27-spline 31 inches
• Rear, 31-spline 33 inches

Suzuki

• 6.9-inch front and rear (Samurai) 31 inches

Toyota

• 7.5-inch IFS 31 inches
• 8-inch, front or rear 33 inches
• 8.25-inch rear 35 inches
• 9.5-inch rear (FJ-40) 35 inches
• 9.5-inch front (FJ-40) 33 inches

Please keep in mind that these specs are only approximations for stock applications. For instance if a Dana 44 can handle 35’s under a full-size rig, then under an s10 it is going to be able to handle more due to less weight and power. It could very possibly handle 38’s or bigger without a problem depending on your right foot. These recommended sizes are also fairly modest and can be outdone, especially if you carry spare parts.

Write up by: Aaron Powers (ghuru x86)

****All specs in this article were taken from “4-Wheelers Bible” by Jim Allen. I suggest you purchase this book or at least check it out. While you will probably already know a lot of the information contained in it, there is still plenty of useful stuff. If your local book store doesn’t carry it, it can be purchased here:  4-Wheelers Bible

Last Modified: 7-13-05 JCH