37X11.50R17 Tire Size

All You Need to Know About 37X11.50R17 Tires

A 37X11.50R17 is a radial flotation tire with an approximate 37-inch overall diameter, 11.5-inch section width, and 17-inch wheel diameter. The "R" explicitly designates radial construction, distinguishing it from the older hyphenated 37x11.50-17 format. Radial construction is the standard for modern truck and off-road tires and directly affects highway durability, heat management, tread stability, and ride quality.

The 37X11.50R17 is the commercially available form of the 37-inch, 11.50-inch-wide tire size. Most current products from brands such as Nitto, BFGoodrich, Toyo, Falken, and Mickey Thompson in this diameter and width are produced as radials under this designation.

37X11.50R17 Size Quick Specs

What 37X11.50R17 Means

• 37 = approximate overall tire diameter in inches
• 11.50 = approximate section width in inches
• R = radial construction
• 17 = wheel diameter in inches

The "R" in the 37X11.50R17 size is the critical differentiator. Radial tires are built with cord plies perpendicular to the direction of travel and stabilized by circumferential belt packages, enabling better heat dissipation and more flexible sidewalls than bias-ply alternatives.

Radial vs Bias-Ply: Why Construction Matters at 37X11.50R17 Size

For any vehicle that will see regular highway miles alongside trail use, radial construction is the appropriate choice.

37X11.50R17 (Metric) Size Equivalents

No metric size exactly duplicates the 37X11.50R17 flotation dimension, but the closest commonly available options are:

37X11.50R17 vs 37X12.50R17

Both sizes deliver identical ground clearance and the same 37-inch obstacle rollover capability. The decision comes down to packaging versus traction surface. The 37X11.50R17 is the better fit for builds where fender clearance, steering articulation room, or narrow axle housing width are limiting factors. The 37X12.50R17 puts more rubber on the ground, which benefits traction in mud, sand, and rock crawling, where a wider contact patch improves grip and load distribution across the tire footprint.

Why Choose a Narrow 37-Inch Radial?

Most 37-inch radial tires use widths between 12.50 and 13.50 inches. The 37X11.50R17 maintains full 37-inch height while reducing width to 11.50 inches, which delivers:

• Reduced fender rubbing risk during articulation
• Less rotational mass than wider 37-inch tires
• Easier packaging on narrower axle housings
• More precise steering feel and less understeer tendency on pavement
• Improved tire penetration in snow and soft mud

Clearance and Lift Requirements

Despite the 37X11.50R17's narrower width, its 37-inch diameter creates substantial clearance demands. Most vehicles need:

• Minimum 3.5–4.5 inches of suspension lift (vehicle-specific)
• Fender trimming or flaring
• Wheel offset and backspacing adjustments
• Bump-stop relocation to prevent the 37X11.50R17 from contacting the fender at full compression

Speedometer and Gearing Effects

The 37X11.50R17 rolls approximately 116.2 inches per revolution. A factory 31-inch tire rolls approximately 97.4 inches - meaning a ~19% difference. On a 33-inch tire baseline, the 37X11.50R17 represents a ~12% increase. Both scenarios require speedometer recalibration and should be evaluated for axle gear ratio adjustment.

37X11.50R17 Common Applications

• Lifted Jeep Wrangler JL and JK builds
• Toyota Tacoma and 4Runner with 4"+ lift
• Ford Bronco and F-150 trail setups
• Overlanding rigs prioritizing clearance over tire width
• Rock-crawlers where fender/steering clearance is limited