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Tires

How Do I Compare the Diameter Of Light Truck Tire Sizes?

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While most passenger car and truck tires follow a similar sizing convention, Light truck tires sometimes (especially in the larger off-road sizes) utilize flotation sizing, which can make comparing sizes somewhat less obvious. While the tire's spec page or tire size calculator will give specific overall dimensions, the provided tire sizing chart below is designed to give a broad view of the differences in tire sizes of light truck tires at a glance.

Note:Tire diameters provided are typical for the tire size. However, different tread designs and molded tread depths can result in slightly different overall tire diameters.

Approx. Tire Diameter
(in Inches)
P-Metric and European Metric LT-Metric Light Truck
82-series and 80-series 75-series and 70-series 65-series and 60-series 55-series and lower 85-series and 80-series 75-series and 70-series 65-series and 60-series 55-series and lower Flotation Numeric
42 42x14.50R17LT
40 40x13.50R20LT
40x13.50R18LT
40x13.50R17LT
38-1/2 38.5x14.50R20LT
38 LT395/70R16 LT395/65R18 38x14.00R24LT
38x15.50R20LT
38x15.50R18LT
38x15.50R15LT
37 LT325/80R16 37x14.00R24LT
37x13.50R22LT
37x13.50R20LT
37x13.50R18LT
37x13.50R17LT
37x12.50R17LT
36 LT375/60R18 36x15.50R20LT
36x15.50R15LT
35 LT305/70R18 LT285/65R20 35x13.50R20LT
LT285/75R18 LT325/65R18
34-1/2 LT315/70R17 LT275/65R20 35X12.50R20LT
LT315/75R16 35x12.50R18LT
35x12.50R17LT
35X12.50R15LT
34 LT305/70R17
33-1/2 LT255/85R16 LT275/70R18 LT285/60R20 LT305/55R20
33 LT285/70R17 LT325/60R18 LT325/50R20 33x12.50R20LT
LT305/70R16 LT305/65R17 LT375/50R18 33x12.50R18LT
LT285/75R16 LT295/65R18 LT375/55R16 33x12.50R17LT
33x15.50R15LT
32-1/2 LT275/70R17 LT305/60R18 LT375/55R16 33X12.50R16.5LT
LT255/75R17 LT275/65R18
LT315/70R15 33X12.50R15LT
32 LT265/70R17 LT345/55R17
LT245/75R17
LT265/75R16
31-1/2 265/70R17 285/60R18 LT235/85R16 LT265/75R16 32X11.50R15LT 7.50R16LT
265/75R16
31 275/70R16 285/55R18 LT215/85R16 LT245/70R17 LT345/55R16
LT245/75R16
30-1/2 265/70R16 285/60R17 LT285/70R15 LT325/60R15 31X10.50R16.5LT 9.50R16.5LT
265/75R15 265/65R17 31X11.50R15LT
31X10.50R15LT
30 255/70R16 275/60R17
255/65R17
29-1/2 245/70R16 265/60R17 LT225/75R16 LT285/60R16 LT315/55R16 30X9.50R15LT 8.75R16.5LT
265/70R15 245/65R17 7.00R15LT
29 205R16 235/70R16 255/60R17 255/55R18 LT235/75R15
205/80R16 255/70R15 255/65R16
235/75R15
28-1/2 225/70R16 LT225/75R15 29X9.50R15LT 8.00R16.5LT
245/70R15
225/75R15
28 215/70R16 275/60R15 255/55R17 LT245/65R15
27-1/2 225/70R15 LT215/75R15
215/75R15
27 205/75R15 255/60R15 255/50R17 LT205/75R15
225/60R16 305/50R15
215/65R16
26-1/2 225/70R14 245/60R15 295/50R15 LT195/75R15 27X8.50R14LT
195/75R15
26 185R14 195/70R15 235/60R15
215/70R14 215/65R15
205/75R14
25-1/2 205/70R14 225/60R15
195/75R14

Verify tire specifications and dimensions of tires by viewing the SPECS page of tires you are interested in. While this chart can't guarantee a specific tire will fit your vehicle, it can give you an idea of the available tire sizes with the same approximate overall diameter. Make sure to see Light Truck Fitment Formula for more info on important things to consider when selecting truck tire sizes. Always verify that the load capacity of the new tire is sufficient for your vehicle.

The approximate width of metric sized tires can be converted into inches by dividing the branded Section Width in millimeters by 25.4; for example LT285/60R16 285 ÷ 25.4 = 11.2"

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