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37x12.50-17 Tire Size
Shop 37x12.50-17 tires in stock with confirmed size specs, validated diameter in inches, approved rim width range, and verified vehicle fitment before purchase.
Browse and filter 37x12.50-17 tires from Yokohama, Hankook, Mickey Thompson and more to quickly find your ideal fit.
All You Need to Know About 37x12.50-17 Tires
A 37x12.50-17 tire is a non-radial flotation tire with a nominal 37-inch overall diameter, a 12.5-inch section width, and a 17-inch wheel diameter. The absence of "R" in the 37x12.50-17 designation is the defining construction marker: this size category covers bias-ply and specialty non-radial off-road tires, not modern radial truck tires. Shoppers looking for radial construction in a 37-inch flotation size should look at 37X12.50R17 instead.
37x12.50-17 Size Quick Specs
- Nominal overall diameter: ~37 inches (actual diameter varies ±1-2% by manufacturer)
- Nominal section width: ~12.5 inches
- Construction type: Bias-ply or non-radial specialty
- Wheel diameter: 17 inches
- Approximate sidewall height: ~10 inches
- Recommended wheel width range: 8.5-11.0 inches
- Standard measuring rim: 17x10
Recommended 37x12.50-17 Tires
What 37x12.50-17 Means
- 37 = nominal tire diameter in inches
- 12.50 = nominal section width in inches
- 17 = wheel diameter in inches
- No "R" = non-radial construction; typically bias-ply
The 37x12.50-17 notation follows traditional flotation sizing conventions that predate modern metric radial formats. Unlike 37X12.50R17, the 37x12.50-17 format does not encode construction type in the size string - the absence of "R" is itself the signal. Bias-ply 37x12.50-17 tires are engineered for low-speed, high-articulation off-road use and are not optimized for highway stability or long tread life at highway speeds.
How 37x12.50-17 Differs From 37X12.50R17
The 37x12.50-17 and 37X12.50R17 sizes share identical nominal dimensions but differ fundamentally in construction. A bias-ply 37x12.50-17 tire uses plies running diagonally across the casing, which produces a softer, more compliant sidewall under off-road articulation but generates more heat at sustained highway speeds. A radial 37X12.50R17 tire uses perpendicular steel belt plies, which stabilize the tread at highway speeds, reduce heat buildup, and extend tread life. In practice, the 37x12.50-17 non-radial designation is found on a narrower range of specialty and military-style tires; the 37X12.50R17 radial format accounts for the majority of modern 37-inch production tires available at retail.
37x12.50-17 vs 35x12.50-17
The 37x12.50-17 provides approximately two additional inches of nominal diameter over the 35x12.50-17, translating to roughly one additional inch of ground clearance under the axle differentials. Section width is identical at 12.5 inches across both sizes, so width-related fitment challenges are similar. The 37x12.50-17's additional height - not its width - is what drives increased lift, trimming, and suspension modification requirements relative to the 35x12.50-17.
Size Specs | 35x12.50-17 | 37x12.50-17 |
Nominal diameter | 35.0" | 37.0" |
Section width | 12.5" | 12.5" |
Diameter difference | baseline | +2.0" |
Approximate axle clearance gain | baseline | ~+1.0" |
Rolling circumference difference | baseline | ~+5.7% |
Clearance and Fitment Considerations for 37x12.50-17
Vehicles that fit a 35x12.50-17 without modification will typically encounter clearance problems with a 37x12.50-17. The 37x12.50-17's added diameter commonly requires:
- Minimum 4–6 inch suspension lift on most truck and Jeep platforms
- Fender trimming or replacement flares to clear the 37-inch diameter at full droop and lock
- Inner fender liner removal or modification
- Bump-stop adjustment to prevent tire-to-frame contact at full compression
- Wheel offset and backspacing changes to manage the 37x12.50-17's wider stance relative to suspension geometry
At the 37x12.50-17 diameter, vertical clearance is the dominant fitment constraint. The 12.5-inch section width rarely causes fender contact independently - it is the two extra inches of diameter that exceed most factory clearance envelopes.
Drivetrain and Gearing Effects of Running 37x12.50-17
A 37x12.50-17 tire has a rolling circumference of approximately 116 inches, based on its 37-inch nominal diameter. Replacing a factory-size tire with a 37x12.50-17 effectively lowers the numerical axle ratio, which reduces acceleration, alters automatic transmission shift points, decreases engine RPM at cruise speed, and increases mechanical load on axle shafts, U-joints, and transfer case components. The severity of these effects depends on how far the 37x12.50-17 departs from the vehicle's original tire diameter. Most dedicated off-road builds running 37x12.50-17 tires re-gear axles - commonly to 4.88 or 5.13 ratios on platforms originally equipped with 3.73 or 4.10 gears - to restore factory-equivalent drivability.
All You Need to Know About 37x12.50-17 Tires
A 37x12.50-17 tire is a non-radial flotation tire with a nominal 37-inch overall diameter, a 12.5-inch section width, and a 17-inch wheel diameter. The absence of "R" in the 37x12.50-17 designation is the defining construction marker: this size category covers bias-ply and specialty non-radial off-road tires, not modern radial truck tires. Shoppers looking for radial construction in a 37-inch flotation size should look at 37X12.50R17 instead.
37x12.50-17 Size Quick Specs
- Nominal overall diameter: ~37 inches (actual diameter varies ±1-2% by manufacturer)
- Nominal section width: ~12.5 inches
- Construction type: Bias-ply or non-radial specialty
- Wheel diameter: 17 inches
- Approximate sidewall height: ~10 inches
- Recommended wheel width range: 8.5-11.0 inches
- Standard measuring rim: 17x10
Recommended 37x12.50-17 Tires
What 37x12.50-17 Means
- 37 = nominal tire diameter in inches
- 12.50 = nominal section width in inches
- 17 = wheel diameter in inches
- No "R" = non-radial construction; typically bias-ply
The 37x12.50-17 notation follows traditional flotation sizing conventions that predate modern metric radial formats. Unlike 37X12.50R17, the 37x12.50-17 format does not encode construction type in the size string - the absence of "R" is itself the signal. Bias-ply 37x12.50-17 tires are engineered for low-speed, high-articulation off-road use and are not optimized for highway stability or long tread life at highway speeds.
How 37x12.50-17 Differs From 37X12.50R17
The 37x12.50-17 and 37X12.50R17 sizes share identical nominal dimensions but differ fundamentally in construction. A bias-ply 37x12.50-17 tire uses plies running diagonally across the casing, which produces a softer, more compliant sidewall under off-road articulation but generates more heat at sustained highway speeds. A radial 37X12.50R17 tire uses perpendicular steel belt plies, which stabilize the tread at highway speeds, reduce heat buildup, and extend tread life. In practice, the 37x12.50-17 non-radial designation is found on a narrower range of specialty and military-style tires; the 37X12.50R17 radial format accounts for the majority of modern 37-inch production tires available at retail.
37x12.50-17 vs 35x12.50-17
The 37x12.50-17 provides approximately two additional inches of nominal diameter over the 35x12.50-17, translating to roughly one additional inch of ground clearance under the axle differentials. Section width is identical at 12.5 inches across both sizes, so width-related fitment challenges are similar. The 37x12.50-17's additional height - not its width - is what drives increased lift, trimming, and suspension modification requirements relative to the 35x12.50-17.
Size Specs | 35x12.50-17 | 37x12.50-17 |
Nominal diameter | 35.0" | 37.0" |
Section width | 12.5" | 12.5" |
Diameter difference | baseline | +2.0" |
Approximate axle clearance gain | baseline | ~+1.0" |
Rolling circumference difference | baseline | ~+5.7% |
Clearance and Fitment Considerations for 37x12.50-17
Vehicles that fit a 35x12.50-17 without modification will typically encounter clearance problems with a 37x12.50-17. The 37x12.50-17's added diameter commonly requires:
- Minimum 4–6 inch suspension lift on most truck and Jeep platforms
- Fender trimming or replacement flares to clear the 37-inch diameter at full droop and lock
- Inner fender liner removal or modification
- Bump-stop adjustment to prevent tire-to-frame contact at full compression
- Wheel offset and backspacing changes to manage the 37x12.50-17's wider stance relative to suspension geometry
At the 37x12.50-17 diameter, vertical clearance is the dominant fitment constraint. The 12.5-inch section width rarely causes fender contact independently - it is the two extra inches of diameter that exceed most factory clearance envelopes.
Drivetrain and Gearing Effects of Running 37x12.50-17
A 37x12.50-17 tire has a rolling circumference of approximately 116 inches, based on its 37-inch nominal diameter. Replacing a factory-size tire with a 37x12.50-17 effectively lowers the numerical axle ratio, which reduces acceleration, alters automatic transmission shift points, decreases engine RPM at cruise speed, and increases mechanical load on axle shafts, U-joints, and transfer case components. The severity of these effects depends on how far the 37x12.50-17 departs from the vehicle's original tire diameter. Most dedicated off-road builds running 37x12.50-17 tires re-gear axles - commonly to 4.88 or 5.13 ratios on platforms originally equipped with 3.73 or 4.10 gears - to restore factory-equivalent drivability.
FAQ
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