Comprehensive Tire Size Equivalent Chart for 33”, 35”, 37”, and 40” Tires

Comprehensive Tire Size Equivalent Chart for 33”, 35”, 37”, and 40” Tires

When upgrading or replacing your truck or off-road vehicle tires, understanding tire sizing can be confusing. Many tire enthusiasts refer to tire sizes using traditional "Flotation" measurements, such as 33-inch, 35-inch, 37-inch, or 40-inch tires. However, modern metric tire sizing adds another layer of complexity. Despite a tire being labeled as a specific size, its actual diameter can be slightly different. For example, a tire marked as 35X12.50-20 may actually measure 34.6 inches in diameter.

To help you select the right tire for your truck, SUV, or off-road rig, we’ve compiled a detailed tire size equivalent chart. This guide provides a comprehensive breakdown of metric tire sizes that correspond to traditional flotation sizes. Whether you need all-terrain or mud-terrain tires, having a clear understanding of equivalent sizes will ensure a perfect fit.

Tire Size Equivalents

33” Tires (Overall Diameter: ±0.50”)


15"

16"

17"

18"

20"

22"

33X9.50-15

285/75-16

275/70-17

275/65-18

285/60-20

285/50-22

33X10.50-15

305/70-16

255/75-17

275/70-18

295/55-20

33X12.50-22

33X11.50-15

375/55-16

285/70-17

305/60-18

305/55-20

305/45-22

33X12.50-15

N/A

305/65-17

295/65-18

325/50-20

N/A

33X13.50-15

N/A

33X12.50-17

33X12.50-18

N/A

N/A

33X15.50-15

N/A

N/A

325/60-18

N/A

N/A

N/A

N/A

N/A

375/50-18

N/A

N/A


35” Tires (Overall Diameter: ±0.50”)

15"

16"

17"

18"

20"

22"

24"

35X12.50-15

315/75-16

315/70-17

285/75-18

275/65-20

35X12.50-22

325/45-24

N/A

N/A

295/70-17

295/70-18

285/65-20

325/50-22

N/A

N/A

N/A

35X12.50-18

295/65-20

N/A

N/A

N/A

N/A

N/A

N/A

305/70-18

315/60-20

N/A

N/A

N/A

N/A

N/A

325/65-18

325/60-20

N/A

N/A

N/A

N/A

N/A

N/A

35X11.50-20

N/A

N/A

N/A

N/A

N/A

N/A

35X12.50-20

N/A

N/A

N/A

N/A

N/A

N/A

35X13.50-20

N/A

N/A

37” Tires (Overall Diameter: ±0.50”)

15"

16"

17"

18"

20"

22"

24"

N/A

385/70-16

37X12.50-17

37X11.50-18

37X12.50-20

37X12.50-22

315/50-24

N/A

N/A

N/A

37X12.50-18

N/A

37X13.50-22

37X13.50-24

N/A

N/A

N/A

37X13.50-18

N/A

N/A

N/A

40” Tires (Overall Diameter: ±0.50”)

15"

16"

17"

18"

20"

22"

24"

N/A

N/A

40X13.50-17

N/A

40X15.50-20

40X15.50-22

40X15.50-24

Choosing the Right Tire Size for Your Vehicle

Selecting the correct tire size depends on several factors, including vehicle clearance, wheel size, and intended usage. If you're planning on upgrading to larger off-road tires, you may need to consider suspension modifications, wheel spacers, or re-gearing your drivetrain to maintain performance.

For those seeking the best selection of all-terrain and mud-terrain tires, look for trusted retailers that offer a wide variety of brands and fast shipping options. Whether you're tackling rugged trails or enhancing your truck's appearance, having the right tire size ensures optimal performance and safety.

Final Thoughts

Understanding tire sizing can be challenging, but with the right information, you can confidently choose the best tires for your truck or off-road vehicle. By using this detailed tire size equivalent chart, you can match flotation sizes with their metric counterparts, ensuring a seamless upgrade.

For expert advice and high-quality tires, be sure to shop from reputable sources with a vast inventory of all-terrain and mud-terrain options ready to ship.

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