tireheight.com

275/65R18 in inches

A 275/65R18 tire is 32.1″ tall and 10.8″ wide, and fits a 18″ wheel. In inches it is written 32.1×10.8R18.

Diameter32.07″
Width10.83″
Sidewall7.04″
275/65R18 drawn to scale: 32.07 inch diameter, 7.04 inch sidewall, 18 inch wheel, 10.83 inch tread width18″ wheel7.04″32.07″ overall10.83″ wideSide view
Drawn to scale. Nominal dimensions calculated from the size code.
Manufacturer data

How tall 275/65R18 tires really are

Heights published by BFGoodrich, General, Michelin, Mickey Thompson and Toyo for all 46 tires in this size. Their published revolutions per mile work out to 31.1–31.5″ under load (below).

Real 275/65R18 tires measure 32.09–32.44″, against 32.07″ from the size code. They run both taller and shorter than the size code.

  1. Toyo M65532.44″ +0.37″
  2. Toyo M-5532.44″ +0.37″
  3. Mickey Thompson Baja Boss A/T32.40″ +0.33″
  4. Toyo Open Country M/T32.32″ +0.25″
  5. Toyo Open Country A/T III · 532.09–32.32″ +0.25″
  6. Toyo Open Country C/T32.32″ +0.25″
  7. Mickey Thompson Baja Legend EXP32.30″ +0.23″
  8. Toyo Open Country WLT132.28″ +0.21″
  9. BFGoodrich All-Terrain T/A KO3 · 232.10″ +0.03″
  10. BFGoodrich HD-Terrain T/A KT32.10″ +0.03″
  11. BFGoodrich Mud-Terrain T/A KM332.10″ +0.03″
  12. BFGoodrich Trail-Terrain T/A32.10″ +0.03″
  13. BFGoodrich Trail-Terrain T/A+32.10″ +0.03″
  14. General Grabber A/TX · 232.10″ +0.03″
  15. General Grabber APT · 232.10″ +0.03″
  16. General Grabber Arctic X32.10″ +0.03″
  17. General Grabber H/T · 232.10″ +0.03″
  18. General Grabber HD32.10″ +0.03″
  19. General Grabber HTS6032.10″ +0.03″
  20. Michelin Agilis CrossClimate 232.10″ +0.03″
  21. Michelin Defender LTX M/S 2 · 232.10″ +0.03″
  22. Michelin LTX A/T2 · 232.10″ +0.03″
  23. Michelin Primacy XC32.10″ +0.03″
  24. Toyo Open Country A/T III EV32.10″ +0.03″
  25. Toyo Open Country R/T Pro32.10″ +0.03″
  26. Toyo Proxes G-Tour32.10″ +0.03″
  27. BFGoodrich Advantage Control HT32.09″ +0.02″
  28. BFGoodrich Elite-Force T/A32.09″ +0.02″
  29. BFGoodrich HD Pro T/A32.09″ +0.02″
  30. Michelin X-Ice Snow32.09″ +0.02″
  31. Michelin X-Ice Snow+32.09″ +0.02″
  32. Toyo Open Country R/T Trail32.09″ +0.02″
  33. Toyo Celsius Cargo32.09″ +0.01″
  34. Toyo Celsius II32.09″ +0.01″
  35. Toyo Open Country H/T II · 232.09″ +0.01″
Each bar runs from the size code's 32.07″ (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 load31.1–31.5″

Published revs per mile (640–648) mean the tire rolls like a 31.1–31.5″ tire on the vehicle. Use this for speedometer calibration.

Weight spread37.7–63.0 lb

The lightest (Michelin X-Ice Snow+, SL) is 25.3 lb lighter per corner than the heaviest (BFGoodrich Mud-Terrain T/A KM3, LT E).

46 tires in 275/65R18

Sort by the spec you care about.

LoadRevs/miSource
Michelin X-Ice Snow+WinterSL · 116H32.0937.710.52,756648Spec page
Michelin Primacy XCAll-terrainSL · 116T32.1038.010.02,756648Spec page
Michelin X-Ice SnowWinterSL · 116T32.0938.310.52,756648Spec page
Toyo Celsius IITouringSL · 116T32.0939.412.12,756647Spec page
Michelin Defender LTX M/S 2All-seasonXL · 116T32.1040.012.52,756648Spec page
Toyo Open Country A/T III EVAll-terrainXL · 116T32.1041.013.52,756647Spec page
Michelin LTX A/T2All-terrainSL · 114T32.1041.213.02,365648Spec page
Toyo Open Country A/T IIIAll-terrainSL · 116T32.0941.613.52,756647Spec page
Toyo Proxes G-TourXL · 116H32.1041.912.32,756647Spec page
General Grabber H/THighwaySL · 116T32.1042.012.02,756648Spec page
Toyo Open Country R/T TrailRugged-terrainXL · 116T32.0942.313.52,756647Spec page
BFGoodrich Advantage Control HTHighwaySL · 116T32.0942.312.02,756648Spec page
General Grabber APTAll-terrainSL · 116T32.1042.714.02,756648Spec page
Toyo Open Country H/T IIHighwaySL · 116T32.0942.712.12,756647Spec page
BFGoodrich Elite-Force T/AAll-seasonXL · 116T32.0943.610.52,756648Spec page
General Grabber A/TXAll-terrainSL · 116S32.1044.914.02,756648Spec page
BFGoodrich Trail-Terrain T/AAll-terrainSL · 116T32.1045.012.52,756648Spec page
BFGoodrich Trail-Terrain T/A+SL · 116T32.1045.912.52,756648Spec page
Mickey Thompson Baja Boss A/TAll-terrainSL · 116T32.4046.016.02,756–Spec page
General Grabber HTS60TouringLT E · 123S32.1047.813.03,415648Spec page
Toyo Open Country WLT1WinterLT E · 123/120Q32.2848.916.53,415643Spec page
BFGoodrich HD Pro T/ACommercialLT E · 123/120R32.0949.313.03,415648Spec page
General Grabber HDCommercialLT E · 123R32.1050.014.03,415648Spec page
Michelin Defender LTX M/S 2All-seasonLT E · 123S32.1050.314.03,415648Spec page
Michelin LTX A/T2All-terrainLT E · 123/120R32.1050.416.03,415648Spec page
Toyo Open Country A/T IIIAll-terrainLT C · 113/110T32.3250.816.42,535643Spec page
Toyo Open Country A/T IIIAll-terrainLT E · 123/120S32.3250.816.43,415643Spec page
General Grabber H/THighwayLT E · 123S32.1050.814.03,415648Spec page
Toyo Open Country A/T IIIAll-terrainLT C · 113/110T32.0951.016.42,535647Spec page
Toyo Celsius CargoLT E · 123/120S32.0951.714.53,415647Spec page
Toyo Open Country A/T IIIAll-terrainLT E · 123/120S32.0951.916.43,415647Spec page
Toyo Open Country H/T IIHighwayLT E · 123/120S32.0952.014.53,415647Spec page
Mickey Thompson Baja Legend EXPAll-terrainLT E · 123Q32.3053.018.53,415–Spec page
Michelin Agilis CrossClimate 2CommercialLT E · 123/120R32.1053.414.03,415648Spec page
General Grabber A/TXAll-terrainLT E · 123R32.1053.716.03,415648Spec page
General Grabber APTAll-terrainLT E · 123R32.1054.115.03,415648Spec page
BFGoodrich All-Terrain T/A KO3All-terrainLT E · 123S32.1056.416.03,415648Spec page
BFGoodrich All-Terrain T/A KO3All-terrainLT D · 119S32.1057.115.03,000648Spec page
Toyo M-55CommercialLT E · 123/120Q32.4457.318.93,415640Spec page
Toyo M655CommercialLT E · 123/120Q32.4457.318.53,415640Spec page
Toyo Open Country R/T ProRugged-terrainLT E · 123/120Q32.1057.817.13,415647Spec page
Toyo Open Country C/TCommercialLT E · 123/120Q32.3258.718.43,415643Spec page
BFGoodrich HD-Terrain T/A KTLT E · 123Q32.1060.518.03,415648Spec page
Toyo Open Country M/TMud-terrainLT E · 123/120P32.3262.618.93,415643Spec page
BFGoodrich Mud-Terrain T/A KM3Mud-terrainLT E · 123Q32.1063.018.03,415648Spec page
General Grabber Arctic XWinterXL · 116T32.10–12.02,756648Spec page

Is 275/65R18 a 32-inch tire?

≈32″

Yes. The size code works out to 32.07″, and the 46 tires here publish 32.09–32.44″, 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 275/65R18Difference
285/60R1831.46-0.61″-1.9%
245/70R1831.50-0.57″-1.8%
265/65R1831.56-0.51″-1.6%
255/70R1832.06-0.02″-0.1%
255/75R1732.06-0.02″-0.0%
305/60R1832.41+0.33″+1.0%
245/75R1832.47+0.39″+1.2%
285/65R1832.59+0.51″+1.6%
265/70R1832.61+0.53″+1.7%
235/80R1832.80+0.73″+2.3%

How to read 275/65R18

How to read any tire size

275/65R18 116T as printed on the tire sidewall, with each part numbered275/65R18 116T123456
How 275/65R18 116T is printed on the sidewall. It's the most common code among the 46 tires here (11 of them); tires in this size come in other load and speed ratings too.
1275Section width

275 mm across the widest point, or 10.83 inches. Every 275 size

265Aspect ratio

A percentage, not a measurement: the sidewall is 65% as tall as the tire is wide, which is 178.8 mm or 7.04 inches.

3RConstruction

Radial construction.

418Wheel diameter

Mounts on a 18-inch wheel. Approved wheel widths run 7.5″ to 9.5″.

5116Load index

Each tire carries up to 2,756 lb (1,250 kg) at its maximum pressure.

6TSpeed rating

Rated for up to 118 mph sustained.

SpecificationInchesMetric
Overall diameter32.07815 mm
Section width10.83275 mm
Sidewall height7.04178.8 mm
Circumference100.82,559 mm
Revolutions per mile (calculated, unloaded)628.8391 per km
Revolutions per mile (published by manufacturers)640–648398–403 per km
Approved wheel width7.5–9.5191–241 mm

Speedometer error after switching to 275/65R18

Your actual speed– mph

Questions about 275/65R18

What is 275/65R18 in inches?

32.07 inches tall, 10.83 inches wide, on a 18-inch wheel. Written in inches, that is roughly 32.1×10.8R18.

How much does a 275/65R18 tire weigh?

Between 37.7 lb and 63.0 lb for the 45 tires listed here. The lightest is the Michelin X-Ice Snow+ (SL); the heaviest is the BFGoodrich Mud-Terrain T/A KM3 (LT E).

What wheel width do I need for 275/65R18?

Manufacturers approve 7.5–9.5″ wide wheels for this size.

How many revolutions per mile does a 275/65R18 make?

Published figures run 640–648 revolutions per mile. The calculated figure is 628.8, but manufacturers measure the tire under load, where it rolls on a smaller radius.

What is the difference between P275/65R18 and LT275/65R18?

Passenger tires (20 here) are built for passenger loads, with max loads of 2365–2756 lb. Light-truck tires (26 here) come in heavier load ranges with max loads of 2535–3415 lb, and are usually heavier with deeper tread.

How much taller is 275/65R18 than 255/70R18?

0.02 inches taller on paper (32.07″ vs 32.06″), which raises the axle about 0.01″. Your speedometer will read about 0.1% slow.