tireheight.com

245/70R17 in inches

A 245/70R17 tire is 30.5″ tall and 9.6″ wide, and fits a 17″ wheel. In inches it is written 30.5×9.6R17.

Diameter30.50″
Width9.65″
Sidewall6.75″
245/70R17 drawn to scale: 30.50 inch diameter, 6.75 inch sidewall, 17 inch wheel, 9.65 inch tread width17″ wheel6.75″30.50″ overall9.65″ wideSide view
Drawn to scale. Nominal dimensions calculated from the size code.
Manufacturer data

How tall 245/70R17 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 29.6–29.9″ under load (below).

Real 245/70R17 tires measure 30.10–30.83″, against 30.50″ from the size code. They run both taller and shorter than the size code.

  1. Toyo M65530.83″ +0.33″
  2. Toyo Open Country C/T30.79″ +0.28″
  3. Toyo Open Country WLT130.63″ +0.13″
  4. BFGoodrich HD-Terrain T/A KT30.60″ +0.10″
  5. Michelin Agilis CrossClimate 230.60″ +0.10″
  6. Toyo Celsius Cargo30.55″ +0.05″
  7. Toyo Observe G3-Ice30.55″ +0.05″
  8. Toyo Open Country A/T III · 230.55″ +0.05″
  9. Toyo Open Country H/T II · 230.55″ +0.05″
  10. BFGoodrich Advantage Control HT30.55″ +0.05″
  11. BFGoodrich HD Pro T/A30.55″ +0.05″
  12. Michelin X-Ice Snow30.55″ +0.05″
  13. BFGoodrich All-Terrain T/A KO330.50″ −0.00″
  14. BFGoodrich Trail-Terrain T/A30.50″ −0.00″
  15. BFGoodrich Trail-Terrain T/A+30.50″ −0.00″
  16. General Grabber A/TX · 230.50″ −0.00″
  17. General Grabber APT30.50″ −0.00″
  18. General Grabber H/T · 230.50″ −0.00″
  19. General Grabber HD30.50″ −0.00″
  20. Michelin Primacy LTX30.50″ −0.00″
  21. Michelin Defender LTX M/S 230.10″ −0.40″
Each bar runs from the size code's 30.50″ (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 load29.6–29.9″

Published revs per mile (674–681) mean the tire rolls like a 29.6–29.9″ tire on the vehicle. Use this for speedometer calibration.

Weight spread30.5–52.1 lb

The lightest (Michelin Primacy LTX, SL) is 21.6 lb lighter per corner than the heaviest (BFGoodrich HD-Terrain T/A KT, LT E).

25 tires in 245/70R17

Sort by the spec you care about.

LoadRevs/miSource
Michelin Primacy LTXAll-seasonSL · 110T30.5030.510.02,337681Spec page
Michelin X-Ice SnowWinterSL · 110T30.5533.210.52,337681Spec page
Michelin Defender LTX M/S 2All-seasonXL · 114T30.1034.312.52,601681Spec page
Toyo Open Country A/T IIIAll-terrainSL · 110T30.5535.313.12,337680Spec page
Toyo Open Country H/T IIHighwaySL · 110T30.5535.511.82,337680Spec page
General Grabber H/THighwaySL · 110T30.5036.512.02,337681Spec page
BFGoodrich Advantage Control HTHighwaySL · 110T30.5536.612.02,337681Spec page
Toyo Observe G3-IceWinterSL · 110T30.5537.013.12,337680Spec page
BFGoodrich Trail-Terrain T/AAll-terrainXL · 114T30.5039.312.52,601681Spec page
BFGoodrich Trail-Terrain T/A+XL · 114T30.5039.912.52,601681Spec page
General Grabber A/TXAll-terrainSL · 110T30.5040.714.02,337681Spec page
BFGoodrich HD Pro T/ACommercialLT E · 119/116R30.5542.113.03,000681Spec page
Toyo Open Country A/T IIIAll-terrainLT E · 119/116R30.5542.216.13,000680Spec page
General Grabber HDCommercialLT E · 119R30.5042.614.03,000681Spec page
General Grabber H/THighwayLT E · 119S30.5043.014.03,000681Spec page
Toyo Open Country H/T IIHighwayLT E · 119/116S30.5543.114.23,000680Spec page
Toyo Celsius CargoLT E · 119/116S30.5543.414.23,000680Spec page
Toyo Open Country WLT1WinterLT E · 119/116Q30.6343.416.33,000678Spec page
Michelin Agilis CrossClimate 2CommercialLT E · 119/116R30.6044.814.03,000681Spec page
General Grabber APTAll-terrainLT E · 119R30.5045.716.03,000681Spec page
General Grabber A/TXAll-terrainLT E · 119R30.5046.417.03,000681Spec page
Toyo M655CommercialLT E · 119/116Q30.8347.018.53,000674Spec page
BFGoodrich All-Terrain T/A KO3All-terrainLT E · 119S30.5049.315.03,000681Spec page
Toyo Open Country C/TCommercialLT E · 119/116Q30.7950.818.33,000675Spec page
BFGoodrich HD-Terrain T/A KTLT E · 119Q30.6052.118.03,000681Spec page

Is 245/70R17 a 31-inch tire?

≈31″

Close. The size code works out to 30.50″, and the 25 tires here publish 30.10–30.83″, so people call it a 31.

All 31-inch tire sizes, on every wheel size.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

SizeDiameter ″vs 245/70R17Difference
235/70R1729.95-0.55″-1.8%
275/60R1729.99-0.51″-1.7%
255/65R1730.05-0.45″-1.5%
225/75R1730.29-0.22″-0.7%
245/75R1630.47-0.04″-0.1%
265/60R1830.52+0.02″+0.1%
265/65R1730.56+0.06″+0.2%
235/75R1730.88+0.37″+1.2%
255/70R1731.06+0.55″+1.8%
275/65R1731.07+0.57″+1.9%

How to read 245/70R17

How to read any tire size

245/70R17 110T as printed on the tire sidewall, with each part numbered245/70R17 110T123456
How 245/70R17 110T is printed on the sidewall. It's the most common code among the 25 tires here (8 of them); tires in this size come in other load and speed ratings too.
1245Section width

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

270Aspect ratio

A percentage, not a measurement: the sidewall is 70% as tall as the tire is wide, which is 171.5 mm or 6.75 inches.

3RConstruction

Radial construction.

417Wheel diameter

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

5110Load index

Each tire carries up to 2,337 lb (1,060 kg) at its maximum pressure.

6TSpeed rating

Rated for up to 118 mph sustained.

SpecificationInchesMetric
Overall diameter30.50775 mm
Section width9.65245 mm
Sidewall height6.75171.5 mm
Circumference95.82,434 mm
Revolutions per mile (calculated, unloaded)661.2411 per km
Revolutions per mile (published by manufacturers)674–681419–423 per km
Approved wheel width6.5–8.0165–203 mm

Speedometer error after switching to 245/70R17

Your actual speed– mph

Questions about 245/70R17

What is 245/70R17 in inches?

30.50 inches tall, 9.65 inches wide, on a 17-inch wheel. Written in inches, that is roughly 30.5×9.6R17.

How much does a 245/70R17 tire weigh?

Between 30.5 lb and 52.1 lb for the 25 tires listed here. The lightest is the Michelin Primacy LTX (SL); the heaviest is the BFGoodrich HD-Terrain T/A KT (LT E).

What wheel width do I need for 245/70R17?

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

How many revolutions per mile does a 245/70R17 make?

Published figures run 674–681 revolutions per mile. The calculated figure is 661.2, but manufacturers measure the tire under load, where it rolls on a smaller radius.

What is the difference between P245/70R17 and LT245/70R17?

Passenger tires (11 here) are built for passenger loads, with max loads of 2337–2601 lb. Light-truck tires (14 here) come in heavier load ranges with max loads of 3000 lb, and are usually heavier with deeper tread.

How much taller is 245/70R17 than 225/75R17?

0.22 inches taller on paper (30.50″ vs 30.29″), which raises the axle about 0.11″. Your speedometer will read about 0.7% slow.