tireheight.com

235/70R17 in inches

A 235/70R17 tire is 30.0″ tall and 9.3″ wide, and fits a 17″ wheel. In inches it is written 30.0×9.3R17.

Diameter29.95″
Width9.25″
Sidewall6.48″
235/70R17 drawn to scale: 29.95 inch diameter, 6.48 inch sidewall, 17 inch wheel, 9.25 inch tread width17″ wheel6.48″29.95″ overall9.25″ wideSide view
Drawn to scale. Nominal dimensions calculated from the size code.
Manufacturer data

How tall 235/70R17 tires really are

Heights published by BFGoodrich, General and Toyo for all 3 tires in this size. Their published revolutions per mile work out to 29.1″ under load (below).

Real 235/70R17 tires measure 30.00″, against 29.95″ from the size code. Every one runs taller than the size code.

Height under load29.1″

Published revs per mile (692–694) mean the tire rolls like a 29.1″ tire on the vehicle. Use this for speedometer calibration.

Weight spread32.1–33.5 lb

The lightest (General Grabber HTS60, XL) is 1.4 lb lighter per corner than the heaviest (Toyo Open Country H/T II, XL).

3 tires in 235/70R17

Sort by the spec you care about.

LoadRevs/miSource
General Grabber HTS60TouringXL · 111T30.0032.112.02,403694Spec page
BFGoodrich Advantage Control HTHighwayXL · 109T30.0033.212.02,271693Spec page
Toyo Open Country H/T IIHighwayXL · 109T30.0033.511.72,271692Spec page

Is 235/70R17 a 30-inch tire?

≈30″

Yes. The size code works out to 29.95″, and the 3 tires here publish 30.00″, so people call it a 30.

All 30-inch tire sizes, on every wheel size.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

SizeDiameter ″vs 235/70R17Difference
265/60R1729.52-0.43″-1.4%
245/65R1729.54-0.41″-1.4%
235/75R1629.88-0.07″-0.2%
275/60R1729.99+0.04″+0.1%
235/65R1830.03+0.07″+0.2%
255/60R1830.05+0.09″+0.3%
255/65R1730.05+0.10″+0.3%
225/75R1730.29+0.33″+1.1%
245/70R1730.50+0.55″+1.8%
265/65R1730.56+0.61″+2.0%

How to read 235/70R17

How to read any tire size

235/70R17 109T as printed on the tire sidewall, with each part numbered235/70R17 109T123456
How 235/70R17 109T is printed on the sidewall. It's the most common code among the 3 tires here (2 of them); tires in this size come in other load and speed ratings too.
1235Section width

235 mm across the widest point, or 9.25 inches. Every 235 size

270Aspect ratio

A percentage, not a measurement: the sidewall is 70% as tall as the tire is wide, which is 164.5 mm or 6.48 inches.

3RConstruction

Radial construction.

417Wheel diameter

Mounts on a 17-inch wheel. Approved wheel widths run 6.0″ to 8.0″.

5109Load index

Each tire carries up to 2,271 lb (1,030 kg) at its maximum pressure.

6TSpeed rating

Rated for up to 118 mph sustained.

XLExtra load

Printed after the size.

SpecificationInchesMetric
Overall diameter29.95761 mm
Section width9.25235 mm
Sidewall height6.48164.5 mm
Circumference94.12,390 mm
Revolutions per mile (calculated, unloaded)673.3418 per km
Revolutions per mile (published by manufacturers)692–694430–431 per km
Approved wheel width6.0–8.0152–203 mm

Speedometer error after switching to 235/70R17

Your actual speed– mph

Questions about 235/70R17

What is 235/70R17 in inches?

29.95 inches tall, 9.25 inches wide, on a 17-inch wheel. Written in inches, that is roughly 30.0×9.3R17.

How much does a 235/70R17 tire weigh?

Between 32.1 lb and 33.5 lb for the 3 tires listed here. The lightest is the General Grabber HTS60 (XL); the heaviest is the Toyo Open Country H/T II (XL).

What wheel width do I need for 235/70R17?

Manufacturers approve 6.0–8.0″ wide wheels for this size.

How many revolutions per mile does a 235/70R17 make?

Published figures run 692–694 revolutions per mile. The calculated figure is 673.3, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 235/70R17 than 245/65R17?

0.41 inches taller on paper (29.95″ vs 29.54″), which raises the axle about 0.21″. Your speedometer will read about 1.4% slow.