tireheight.com

255/75R17 in inches

A 255/75R17 tire is 32.1″ tall and 10.0″ wide, and fits a 17″ wheel. In inches it is written 32.1×10.0R17.

Diameter32.06″
Width10.04″
Sidewall7.53″
255/75R17 drawn to scale: 32.06 inch diameter, 7.53 inch sidewall, 17 inch wheel, 10.04 inch tread width17″ wheel7.53″32.06″ overall10.04″ wideSide view
Drawn to scale. Nominal dimensions calculated from the size code.
Manufacturer data

How tall 255/75R17 tires really are

Heights published by BFGoodrich, General, Michelin and Toyo for all 10 tires in this size. Their published revolutions per mile work out to 31.1–31.3″ under load (below).

Real 255/75R17 tires measure 32.00–32.28″, against 32.06″ from the size code. They run both taller and shorter than the size code.

  1. Toyo Open Country M/T32.28″ +0.22″
  2. BFGoodrich Mud-Terrain T/A KM332.10″ +0.04″
  3. General Grabber APT32.10″ +0.04″
  4. BFGoodrich Advantage Control HT32.05″ −0.01″
  5. BFGoodrich Mud-Terrain T/A KM232.05″ −0.01″
  6. Toyo Open Country A/T III32.05″ −0.01″
  7. BFGoodrich All-Terrain T/A KO332.00″ −0.06″
  8. BFGoodrich Trail-Terrain T/A32.00″ −0.06″
  9. BFGoodrich Trail-Terrain T/A+32.00″ −0.06″
  10. Michelin Defender LTX M/S 232.00″ −0.06″
Each bar runs from the size code's 32.06″ (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 load31.1–31.3″

Published revs per mile (644–649) mean the tire rolls like a 31.1–31.3″ tire on the vehicle. Use this for speedometer calibration.

Weight spread37.0–56.9 lb

The lightest (Michelin Defender LTX M/S 2, XL) is 19.9 lb lighter per corner than the heaviest (Toyo Open Country M/T, LT C).

10 tires in 255/75R17

Sort by the spec you care about.

LoadRevs/miSource
Michelin Defender LTX M/S 2All-seasonXL · 116T32.0037.012.52,756649Spec page
BFGoodrich Advantage Control HTHighwaySL · 115T32.0539.012.02,679649Spec page
General Grabber APTAll-terrainSL · 115T32.1039.514.02,679648Spec page
BFGoodrich Trail-Terrain T/AAll-terrainSL · 115T32.0042.212.52,679649Spec page
BFGoodrich Trail-Terrain T/A+SL · 115T32.0043.612.52,679649Spec page
BFGoodrich All-Terrain T/A KO3All-terrainLT C · 111S32.0047.215.02,405649Spec page
Toyo Open Country A/T IIIAll-terrainLT C · 111/108S32.0547.616.32,405648Spec page
BFGoodrich Mud-Terrain T/A KM2Mud-terrainLT C · 111Q32.0549.317.02,405649Spec page
BFGoodrich Mud-Terrain T/A KM3Mud-terrainLT C · 111Q32.1054.518.02,405649Spec page
Toyo Open Country M/TMud-terrainLT C · 111/108Q32.2856.918.32,405644Spec page

Is 255/75R17 a 32-inch tire?

≈32″

Yes. The size code works out to 32.06″, and the 10 tires here publish 32.00–32.28″, 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 255/75R17Difference
245/75R1731.47-0.59″-1.8%
265/70R1731.61-0.45″-1.4%
235/80R1731.80-0.26″-0.8%
255/70R1832.06-0.00″-0.0%
275/65R1832.07+0.02″+0.0%
275/70R1732.16+0.10″+0.3%
305/65R1732.61+0.55″+1.7%
285/70R1732.71+0.65″+2.0%
33×12.50R1733.00+0.94″+2.9%
33×15.50R1733.00+0.94″+2.9%

How to read 255/75R17

How to read any tire size

255/75R17 115T as printed on the tire sidewall, with each part numbered255/75R17 115T123456
How 255/75R17 115T is printed on the sidewall. It's the most common code among the 10 tires here (4 of them); tires in this size come in other load and speed ratings too.
1255Section width

255 mm across the widest point, or 10.04 inches. Every 255 size

275Aspect ratio

A percentage, not a measurement: the sidewall is 75% as tall as the tire is wide, which is 191.3 mm or 7.53 inches.

3RConstruction

Radial construction.

417Wheel diameter

Mounts on a 17-inch wheel. Approved wheel widths run 6.5″ to 8.5″.

5115Load index

Each tire carries up to 2,679 lb (1,215 kg) at its maximum pressure.

6TSpeed rating

Rated for up to 118 mph sustained.

SpecificationInchesMetric
Overall diameter32.06814 mm
Section width10.04255 mm
Sidewall height7.53191.3 mm
Circumference100.72,558 mm
Revolutions per mile (calculated, unloaded)629.1391 per km
Revolutions per mile (published by manufacturers)644–649400–403 per km
Approved wheel width6.5–8.5165–216 mm

Speedometer error after switching to 255/75R17

Your actual speed– mph

Questions about 255/75R17

What is 255/75R17 in inches?

32.06 inches tall, 10.04 inches wide, on a 17-inch wheel. Written in inches, that is roughly 32.1×10.0R17.

How much does a 255/75R17 tire weigh?

Between 37.0 lb and 56.9 lb for the 10 tires listed here. The lightest is the Michelin Defender LTX M/S 2 (XL); the heaviest is the Toyo Open Country M/T (LT C).

What wheel width do I need for 255/75R17?

Manufacturers approve 6.5–8.5″ wide wheels for this size.

How many revolutions per mile does a 255/75R17 make?

Published figures run 644–649 revolutions per mile. The calculated figure is 629.1, but manufacturers measure the tire under load, where it rolls on a smaller radius.

What is the difference between P255/75R17 and LT255/75R17?

Passenger tires (5 here) are built for passenger loads, with max loads of 2679–2756 lb. Light-truck tires (5 here) come in heavier load ranges with max loads of 2405 lb, and are usually heavier with deeper tread.

How much taller is 255/75R17 than 235/80R17?

0.26 inches taller on paper (32.06″ vs 31.80″), which raises the axle about 0.13″. Your speedometer will read about 0.8% slow.