275/45R22 in inches

A 275/45R22 tire is 31.7″ tall and 10.8″ wide, and fits a 22″ wheel. In inches it is written 31.7×10.8R22.

Diameter31.74″

Width10.83″

Sidewall4.87″

Drawn to scale. Nominal dimensions calculated from the size code.

Manufacturer data

How tall 275/45R22 tires really are

Heights published by BFGoodrich, Michelin and Toyo for all 5 tires in this size. Their published revolutions per mile work out to 30.8″ under load (below).

Real 275/45R22 tires measure 31.77–31.80″, against 31.74″ from the size code. Every one runs taller than the size code.

Height under load30.8″

Published revs per mile (654–655) mean the tire rolls like a 30.8″ tire on the vehicle. Use this for speedometer calibration.

Weight spread37.4–45.5 lb

The lightest (Michelin Defender LTX M/S 2, XL) is 8.1 lb lighter per corner than the heaviest (BFGoodrich Trail-Terrain T/A, XL).

5 tires in 275/45R22

Sort by the spec you care about.

	Load					Revs/mi	Source
Michelin Defender LTX M/S 2All-season	XL · 112H	31.80	37.4	11.0	2,469	655	Spec page
Michelin X-Ice SnowWinter	XL · 112T	31.77	37.5	10.5	2,469	655	Spec page
Michelin X-Ice Snow+Winter	XL · 112H	31.77	38.2	10.5	2,469	655	Spec page
Toyo OPEN COUNTRY Q/TAll-season	XL · 112V	31.77	40.3	12.3	2,469	654	Spec page
BFGoodrich Trail-Terrain T/AAll-terrain	XL · 112H	31.80	45.5	12.5	2,469	655	Spec page

Is 275/45R22 a 32-inch tire?

≈32″

Yes. The size code works out to 31.74″, and the 5 tires here publish 31.77–31.80″, 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.

Size	Diameter ″	vs 275/45R22	Difference
325/35R22	30.96	-0.79″	-2.5%
285/40R22	30.98	-0.77″	-2.4%
255/45R22	31.04	-0.71″	-2.2%
295/40R22	31.29	-0.45″	-1.4%
305/40R22	31.61	-0.14″	-0.4%
275/50R21	31.83	+0.08″	+0.3%
325/35R23	31.96	+0.21″	+0.7%
285/45R22	32.10	+0.35″	+1.1%
325/40R22	32.24	+0.49″	+1.6%
265/50R22	32.43	+0.69″	+2.2%

How to read 275/45R22

How to read any tire size

How 275/45R22 112H is printed on the sidewall. It's the most common code among the 5 tires here (3 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

245Aspect ratio

A percentage, not a measurement: the sidewall is 45% as tall as the tire is wide, which is 123.8 mm or 4.87 inches.

3RConstruction

Radial construction.

422Wheel diameter

Mounts on a 22-inch wheel. Approved wheel widths run 8.5″ to 10.5″.

5112Load index

Each tire carries up to 2,469 lb (1,120 kg) at its maximum pressure.

6HSpeed rating

Rated for up to 130 mph sustained.

XLExtra load

Printed after the size.

Specification	Inches	Metric
Overall diameter	31.74	806 mm
Section width	10.83	275 mm
Sidewall height	4.87	123.8 mm
Circumference	99.7	2,533 mm
Revolutions per mile (calculated, unloaded)	635.3	395 per km
Revolutions per mile (published by manufacturers)	654–655	406–407 per km
Approved wheel width	8.5–10.5	216–267 mm

Speedometer error after switching to 275/45R22

Your actual speed– mph

Questions about 275/45R22

What is 275/45R22 in inches?

31.74 inches tall, 10.83 inches wide, on a 22-inch wheel. Written in inches, that is roughly 31.7×10.8R22.

How much does a 275/45R22 tire weigh?

Between 37.4 lb and 45.5 lb for the 5 tires listed here. The lightest is the Michelin Defender LTX M/S 2 (XL); the heaviest is the BFGoodrich Trail-Terrain T/A (XL).

What wheel width do I need for 275/45R22?

Manufacturers approve 8.5–10.5″ wide wheels for this size.

How many revolutions per mile does a 275/45R22 make?

Published figures run 654–655 revolutions per mile. The calculated figure is 635.3, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 275/45R22 than 305/40R22?

0.14 inches taller on paper (31.74″ vs 31.61″), which raises the axle about 0.07″. Your speedometer will read about 0.4% slow.