tireheight.com

285/70R17 in inches

A 285/70R17 tire is 32.7″ tall and 11.2″ wide, and fits a 17″ wheel. In inches it is written 32.7×11.2R17.

Diameter32.71″
Width11.22″
Sidewall7.85″
3D render of a 285/70R17 tire on a 17-inch wheel, to scale
Rendered to scale from the size code. Generic tread, not a specific tire.
Manufacturer data

How tall 285/70R17 tires really are

Heights published by BFGoodrich, General, Michelin, Mickey Thompson and Toyo for all 36 tires in this size. Their published revolutions per mile work out to 31.8–32.2″ under load (below).

Real 285/70R17 tires measure 32.70–33.15″, against 32.71″ from the size code. Most run taller than the size code (33 of 36).

  1. Toyo M-5533.15″ +0.44″
  2. Mickey Thompson Baja Legend EXP33.10″ +0.39″
  3. Toyo M65533.07″ +0.36″
  4. Mickey Thompson Baja Boss M/T33.00″ +0.29″
  5. Mickey Thompson Baja Legend MTZ33.00″ +0.29″
  6. Mickey Thompson Baja Boss A/T · 232.80–33.00″ +0.29″
  7. Toyo Open Country C/T · 232.99″ +0.28″
  8. Toyo Open Country M/T · 232.99″ +0.28″
  9. Toyo Open Country R/T32.99″ +0.28″
  10. Toyo Open Country A/T III · 432.76–32.99″ +0.28″
  11. Toyo Open Country WLT132.84″ +0.13″
  12. BFGoodrich All-Terrain T/A KO2 · 232.80″ +0.09″
  13. BFGoodrich All-Terrain T/A KO3 · 332.80″ +0.09″
  14. BFGoodrich HD-Terrain T/A KT32.80″ +0.09″
  15. BFGoodrich Mud-Terrain T/A KM3 · 232.80″ +0.09″
  16. BFGoodrich Trail-Terrain T/A32.80″ +0.09″
  17. BFGoodrich Trail-Terrain T/A+32.80″ +0.09″
  18. Michelin Defender LTX M/S 232.80″ +0.09″
  19. Toyo Open Country R/T Pro32.76″ +0.05″
  20. Toyo Open Country R/T Trail · 332.76″ +0.05″
  21. Toyo Open Country H/T II32.76″ +0.05″
  22. General Grabber A/TX32.70″ −0.01″
  23. General Grabber APT32.70″ −0.01″
  24. General Grabber X332.70″ −0.01″
Each bar runs from the size code's 32.71″ (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 load31.8–32.2″

Published revs per mile (627–635) mean the tire rolls like a 31.8–32.2″ tire on the vehicle. Use this for speedometer calibration.

Weight spread46.0–65.7 lb

The lightest (Toyo Open Country A/T III, SL) is 19.7 lb lighter per corner than the heaviest (BFGoodrich Mud-Terrain T/A KM3, LT E).

36 tires in 285/70R17

Sort by the spec you care about.

LoadRevs/miSource
Toyo Open Country A/T IIIAll-terrainSL · 117T32.7646.013.62,833634Spec page
BFGoodrich Trail-Terrain T/AAll-terrainSL · 117T32.8046.412.52,833635Spec page
BFGoodrich Trail-Terrain T/A+SL · 117T32.8047.012.52,833635Spec page
Mickey Thompson Baja Boss A/TAll-terrainSL · 116T32.8048.016.02,756–Spec page
Toyo Open Country R/T TrailRugged-terrainSL · 116Q32.7649.113.62,756634Spec page
BFGoodrich All-Terrain T/A KO2All-terrainLT C · 116Q32.8050.315.02,755635Spec page
BFGoodrich All-Terrain T/A KO3All-terrainLT C · 116S32.8051.315.02,755635Spec page
BFGoodrich All-Terrain T/A KO2All-terrainLT C · 116S32.8051.415.02,755635Spec page
Michelin Defender LTX M/S 2All-seasonLT E · 126S32.8051.514.03,750635Spec page
Toyo Open Country WLT1WinterLT E · 121/118Q32.8451.816.53,195633Spec page
Toyo Open Country A/T IIIAll-terrainLT E · 121/118S32.9953.216.53,195630Spec page
Toyo Open Country H/T IIHighwayLT E · 121/118S32.7653.415.83,195634Spec page
Toyo Open Country A/T IIIAll-terrainLT C · 116/113Q32.7654.616.52,755634Spec page
Toyo Open Country A/T IIIAll-terrainLT E · 121/118S32.7654.716.53,195634Spec page
Toyo Open Country R/T TrailRugged-terrainLT C · 116/113S32.7655.716.52,755634Spec page
General Grabber A/TXAll-terrainLT E · 121S32.7055.716.03,195635Spec page
BFGoodrich All-Terrain T/A KO3All-terrainLT C · 116S32.8057.015.02,755635Spec page
Mickey Thompson Baja Legend EXPAll-terrainLT E · 121Q33.1057.018.53,195–Spec page
Toyo Open Country R/T TrailRugged-terrainLT E · 126/123Q32.7657.316.53,750634Spec page
Toyo M-55CommercialLT E · 121/118Q33.1557.818.93,195627Spec page
Toyo M655CommercialLT E · 126/123Q33.0757.818.53,750628Spec page
General Grabber APTAll-terrainLT E · 121S32.7058.116.03,195635Spec page
BFGoodrich All-Terrain T/A KO3All-terrainLT E · 126S32.8059.316.03,750635Spec page
Toyo Open Country R/TRugged-terrainLT E · 121/118Q32.9959.716.43,195630Spec page
Toyo Open Country R/T ProRugged-terrainLT E · 126/123Q32.7659.817.13,750634Spec page
Toyo Open Country C/TCommercialLT E · 121/118Q32.9960.818.43,195630Spec page
Mickey Thompson Baja Legend MTZMud-terrainLT E · 121Q33.0062.019.03,195–Spec page
General Grabber X3Mud-terrainLT E · 121Q32.7062.218.03,195635Spec page
BFGoodrich HD-Terrain T/A KTLT E · 126Q32.8062.618.03,750635Spec page
Toyo Open Country C/TCommercialLT C · 116/113Q32.9962.718.42,755630Spec page
Mickey Thompson Baja Boss A/TAll-terrainLT E · 121Q33.0063.018.53,195–Spec page
Mickey Thompson Baja Boss M/TMud-terrainLT E · 121Q33.0063.019.03,195–Spec page
Toyo Open Country M/TMud-terrainLT E · 121/118P32.9963.718.93,195630Spec page
Toyo Open Country M/TMud-terrainLT C · 116/113Q32.9964.618.92,755630Spec page
BFGoodrich Mud-Terrain T/A KM3Mud-terrainLT E · 126Q32.8065.718.03,750635Spec page
BFGoodrich Mud-Terrain T/A KM3Mud-terrainLT D · 121Q32.8065.718.03,195635Spec page

Is 285/70R17 a 33-inch tire?

≈33″

Yes. The size code works out to 32.71″, and the 36 tires here publish 32.70–33.15″, so people call it a 33.

All 33-inch tire sizes, on every wheel size.

A true 33×12.50R17 is 0.29″ taller on paper and 1.3″ wider.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

SizeDiameter ″vs 285/70R17Difference
255/75R1732.06-0.65″-2.0%
275/70R1732.16-0.55″-1.7%
265/70R1832.61-0.10″-0.3%
305/65R1732.61-0.10″-0.3%
235/80R1832.80+0.09″+0.3%
305/70R1632.81+0.10″+0.3%
33×12.50R1733.00+0.29″+0.9%
33×15.50R1733.00+0.29″+0.9%
255/80R1733.06+0.35″+1.1%
295/70R1733.26+0.55″+1.7%

How to read 285/70R17

How to read any tire size

LT285/70R17 121Q as printed on the tire sidewall, with each part numberedLT285/70R17 121Q1234567
How LT285/70R17 121Q is printed on the sidewall. It's the most common code among the 36 tires here (5 of them); tires in this size come in other load and speed ratings too.
1LTLight truck

Marks a light truck (LT) tire.

2285Section width

285 mm across the widest point, or 11.22 inches. Every 285 size

370Aspect ratio

A percentage, not a measurement: the sidewall is 70% as tall as the tire is wide, which is 199.5 mm or 7.85 inches.

4RConstruction

Radial construction.

517Wheel diameter

Mounts on a 17-inch wheel. Approved wheel widths run 7.5″ to 10.0″.

6121Load index

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

7QSpeed rating

Rated for up to 99 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 3,750 lb each, as published.

285/70R17 drawn to scale: 32.71 inch diameter, 7.85 inch sidewall, 17 inch wheel, 11.22 inch tread width17″ wheel7.85″32.71″ overall11.22″ wideSide view
Drawn to scale from the size code.
SpecificationInchesMetric
Overall diameter32.71831 mm
Section width11.22285 mm
Sidewall height7.85199.5 mm
Circumference102.82,610 mm
Revolutions per mile (calculated, unloaded)616.6383 per km
Revolutions per mile (published by manufacturers)627–635390–395 per km
Approved wheel width7.5–10.0191–254 mm

Speedometer error after switching to 285/70R17

Your actual speed– mph

Questions about 285/70R17

What is 285/70R17 in inches?

32.71 inches tall, 11.22 inches wide, on a 17-inch wheel. Written in inches, that is roughly 32.7×11.2R17.

How much does a 285/70R17 tire weigh?

Between 46.0 lb and 65.7 lb for the 36 tires listed here. The lightest is the Toyo Open Country A/T III (SL); the heaviest is the BFGoodrich Mud-Terrain T/A KM3 (LT E).

What wheel width do I need for 285/70R17?

Manufacturers approve 7.5–10.0″ wide wheels for this size.

How many revolutions per mile does a 285/70R17 make?

Published figures run 627–635 revolutions per mile. The calculated figure is 616.6, but manufacturers measure the tire under load, where it rolls on a smaller radius.

What is the difference between P285/70R17 and LT285/70R17?

Passenger tires (5 here) are built for passenger loads, with max loads of 2756–2833 lb. Light-truck tires (31 here) come in heavier load ranges with max loads of 2755–3750 lb, and are usually heavier with deeper tread.

How much taller is 285/70R17 than 305/65R17?

0.10 inches taller on paper (32.71″ vs 32.61″), which raises the axle about 0.05″. Your speedometer will read about 0.3% slow.