tireheight.com

245/75R17 in inches

A 245/75R17 tire is 31.5″ tall and 9.6″ wide, and fits a 17″ wheel. In inches it is written 31.5×9.6R17.

Diameter31.47″
Width9.65″
Sidewall7.23″
245/75R17 drawn to scale: 31.47 inch diameter, 7.23 inch sidewall, 17 inch wheel, 9.65 inch tread width17″ wheel7.23″31.47″ overall9.65″ wideSide view
Drawn to scale. Nominal dimensions calculated from the size code.
Manufacturer data

How tall 245/75R17 tires really are

Heights published by BFGoodrich, General, Michelin and Toyo for all 25 tires in this size. Their published revolutions per mile work out to 30.6–31.0″ under load (below).

Real 245/75R17 tires measure 31.50–31.89″, against 31.47″ from the size code. Every one runs taller than the size code.

  1. Toyo M-5531.89″ +0.42″
  2. Toyo M65531.89″ +0.42″
  3. Toyo Open Country C/T31.73″ +0.26″
  4. Toyo Open Country WLT131.57″ +0.11″
  5. BFGoodrich Advantage Control HT31.50″ +0.03″
  6. BFGoodrich All-Terrain T/A KO331.50″ +0.03″
  7. BFGoodrich HD Pro T/A31.50″ +0.03″
  8. BFGoodrich HD-Terrain T/A KT31.50″ +0.03″
  9. BFGoodrich Trail-Terrain T/A31.50″ +0.03″
  10. BFGoodrich Trail-Terrain T/A+31.50″ +0.03″
  11. General Grabber A/TX31.50″ +0.03″
  12. General Grabber APT31.50″ +0.03″
  13. General Grabber H/T31.50″ +0.03″
  14. General Grabber HD31.50″ +0.03″
  15. General Grabber HTS6031.50″ +0.03″
  16. Michelin Agilis CrossClimate 231.50″ +0.03″
  17. Michelin Defender LTX M/S 2 · 231.50″ +0.03″
  18. Michelin LTX A/T2 · 231.50″ +0.03″
  19. Michelin LTX M/S231.50″ +0.03″
  20. Toyo Celsius Cargo31.50″ +0.03″
  21. Toyo Open Country A/T III31.50″ +0.03″
  22. Toyo Open Country H/T II · 231.50″ +0.03″
Each bar runs from the size code's 31.47″ (the orange line) to the model's published height. The track spans 1.0″. Where a model comes in several load ranges, the darker part shows its range of heights; the number after the name is how many versions it comes in.
Height under load30.6–31.0″

Published revs per mile (651–660) mean the tire rolls like a 30.6–31.0″ tire on the vehicle. Use this for speedometer calibration.

Weight spread35.9–55.0 lb

The lightest (Michelin Defender LTX M/S 2, XL) is 19.1 lb lighter per corner than the heaviest (BFGoodrich HD-Terrain T/A KT, LT E).

25 tires in 245/75R17

Sort by the spec you care about.

LoadRevs/miSource
Michelin Defender LTX M/S 2All-seasonXL · 116T31.5035.912.52,756660Spec page
BFGoodrich Advantage Control HTHighwaySL · 112T31.5037.512.02,469660Spec page
Toyo Celsius CargoLT E · 121/118S31.5040.514.43,195660Spec page
BFGoodrich Trail-Terrain T/AAll-terrainSL · 112T31.5040.912.52,469660Spec page
BFGoodrich Trail-Terrain T/A+SL · 112T31.5041.712.52,469660Spec page
BFGoodrich HD Pro T/ACommercialLT E · 121/118R31.5043.413.03,195660Spec page
General Grabber HDCommercialLT E · 121S31.5043.714.03,195660Spec page
General Grabber H/THighwayLT E · 121S31.5044.014.03,195660Spec page
General Grabber HTS60TouringLT E · 121S31.5044.314.03,195660Spec page
Toyo Open Country A/T IIIAll-terrainLT E · 121/118S31.5044.316.13,195660Spec page
Toyo Open Country H/T IIHighwayLT E · 121/118S31.5044.514.43,195660Spec page
Toyo Open Country H/T IIHighwayLT E · 121/118S31.5044.514.43,195660Spec page
Toyo Open Country WLT1WinterLT E · 121/118Q31.5744.516.33,195658Spec page
Michelin Defender LTX M/S 2All-seasonLT E · 121S31.5046.714.03,195660Spec page
Michelin LTX M/S2All-seasonLT E · 121/118R31.5046.812.03,195660Spec page
Michelin LTX A/T2All-terrainLT E · 121/118R31.5047.512.53,195660Spec page
General Grabber APTAll-terrainLT E · 121S31.5047.716.03,195660Spec page
Michelin LTX A/T2All-terrainLT E · 121/118R31.5048.112.53,195660Spec page
Michelin Agilis CrossClimate 2CommercialLT E · 121/118R31.5048.314.03,195660Spec page
General Grabber A/TXAll-terrainLT E · 121S31.5048.616.03,195660Spec page
Toyo M-55CommercialLT E · 121/118Q31.8949.417.63,195651Spec page
BFGoodrich All-Terrain T/A KO3All-terrainLT E · 121S31.5051.516.03,195660Spec page
Toyo M655CommercialLT E · 121/118Q31.8951.818.53,195651Spec page
Toyo Open Country C/TCommercialLT E · 121/118Q31.7353.818.33,195655Spec page
BFGoodrich HD-Terrain T/A KTLT E · 121Q31.5055.018.03,195660Spec page

Is 245/75R17 a 32-inch tire?

≈32″

Close. The size code works out to 31.47″, and the 25 tires here publish 31.50–31.89″, so people call it a 32.

All 32-inch tire sizes, on every wheel size.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

SizeDiameter ″vs 245/75R17Difference
235/75R1730.88-0.59″-1.9%
255/70R1731.06-0.41″-1.3%
275/65R1731.07-0.39″-1.3%
285/60R1831.46-0.00″-0.0%
245/70R1831.50+0.04″+0.1%
265/65R1831.56+0.09″+0.3%
265/70R1731.61+0.14″+0.4%
235/80R1731.80+0.33″+1.1%
255/75R1732.06+0.59″+1.9%
275/70R1732.16+0.69″+2.2%

How to read 245/75R17

How to read any tire size

LT245/75R17 121S as printed on the tire sidewall, with each part numberedLT245/75R17 121S1234567
How LT245/75R17 121S is printed on the sidewall. It's the most common code among the 25 tires here (7 of them); tires in this size come in other load and speed ratings too.
1LTLight truck

Marks a light truck (LT) tire.

2245Section width

245 mm across the widest point, or 9.65 inches. Every 245 size

375Aspect ratio

A percentage, not a measurement: the sidewall is 75% as tall as the tire is wide, which is 183.8 mm or 7.23 inches.

4RConstruction

Radial construction.

517Wheel diameter

Mounts on a 17-inch wheel. Approved wheel widths run 6.5″ to 8.0″.

6121Load index

Each tire carries up to 3,195 lb (1,450 kg) at its maximum pressure.

7SSpeed rating

Rated for up to 112 mph sustained.

ELoad range

Printed separately as "LOAD RANGE E": a 10-ply rating, inflated up to 80 psi (standard load-range table). The load range E tires here carry up to 3,195 lb each, as published.

SpecificationInchesMetric
Overall diameter31.47799 mm
Section width9.65245 mm
Sidewall height7.23183.8 mm
Circumference98.92,511 mm
Revolutions per mile (calculated, unloaded)640.9398 per km
Revolutions per mile (published by manufacturers)651–660405–410 per km
Approved wheel width6.5–8.0165–203 mm

Speedometer error after switching to 245/75R17

Your actual speed– mph

Questions about 245/75R17

What is 245/75R17 in inches?

31.47 inches tall, 9.65 inches wide, on a 17-inch wheel. Written in inches, that is roughly 31.5×9.6R17.

How much does a 245/75R17 tire weigh?

Between 35.9 lb and 55.0 lb for the 25 tires listed here. The lightest is the Michelin Defender LTX M/S 2 (XL); the heaviest is the BFGoodrich HD-Terrain T/A KT (LT E).

What wheel width do I need for 245/75R17?

Manufacturers approve 6.5–8.0″ wide wheels for this size.

How many revolutions per mile does a 245/75R17 make?

Published figures run 651–660 revolutions per mile. The calculated figure is 640.9, but manufacturers measure the tire under load, where it rolls on a smaller radius.

What is the difference between P245/75R17 and LT245/75R17?

Passenger tires (4 here) are built for passenger loads, with max loads of 2469–2756 lb. Light-truck tires (21 here) come in heavier load ranges with max loads of 3195 lb, and are usually heavier with deeper tread.

How much taller is 245/75R17 than 275/65R17?

0.39 inches taller on paper (31.47″ vs 31.07″), which raises the axle about 0.20″. Your speedometer will read about 1.3% slow.