tireheight.com285/40R22 in inches
A 285/40R22 tire is 31.0″ tall and 11.2″ wide, and fits a 22″ wheel. In inches it is written 31.0×11.2R22.
How tall 285/40R22 tires really are
Heights published by Michelin and Toyo for all 8 tires in this size. Their published revolutions per mile work out to 30.1″ under load (below).
Real 285/40R22 tires measure 30.98–31.00″, against 30.98″ from the size code. Most run taller than the size code (6 of 8).
Published revs per mile (670–671) mean the tire rolls like a 30.1″ tire on the vehicle. Use this for speedometer calibration.
The lightest (Michelin Pilot Sport 4 SUV, XL) is 8.8 lb lighter per corner than the heaviest (Toyo Proxes ST III, XL).
8 tires in 285/40R22
Sort by the spec you care about.
| Load | Revs/mi | Source | |||||
|---|---|---|---|---|---|---|---|
| Michelin Pilot Sport 4 SUVPerformance | XL · 110(Y) | 31.00 | 33.3 | 9.0 | 2,337 | 671 | Spec page |
| Michelin Pilot Sport 4 SPerformance | XL · 110(Y) | 31.00 | 33.6 | 9.0 | 2,337 | 671 | Spec page |
| Michelin CrossClimate2All-season | XL · 110W | 31.00 | 34.4 | 10.0 | 2,337 | 671 | Spec page |
| Michelin Pilot Sport All-Season 4Performance | XL · 110Y | 31.00 | 35.1 | 10.0 | 2,337 | 671 | Spec page |
| Michelin Primacy Tour A/STouring | XL · 110Y | 31.00 | 35.8 | 9.5 | 2,337 | 671 | Spec page |
| Michelin X-Ice SnowWinter | XL · 110H | 30.98 | 37.6 | 10.5 | 2,337 | 671 | Spec page |
| Michelin Pilot Sport EVPerformance | XL · 110V | 31.00 | 39.5 | 8.5 | 2,337 | 671 | Spec page |
| Toyo Proxes ST IIIPerformance | XL · 110V | 30.98 | 42.1 | 10.1 | 2,337 | 670 | Spec page |
Is 285/40R22 a 31-inch tire?
Yes. The size code works out to 30.98″, and the 8 tires here publish 30.98–31.00″, 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.
How to read 285/40R22
A percentage, not a measurement: the sidewall is 40% as tall as the tire is wide, which is 114.0 mm or 4.49 inches.
Radial construction.
Mounts on a 22-inch wheel. Approved wheel widths run 9.5″ to 11.0″.
Each tire carries up to 2,337 lb (1,060 kg) at its maximum pressure.
Rated for up to 186 mph sustained.
Printed after the size.
| Specification | Inches | Metric |
|---|---|---|
| Overall diameter | 30.98 | 787 mm |
| Section width | 11.22 | 285 mm |
| Sidewall height | 4.49 | 114.0 mm |
| Circumference | 97.3 | 2,472 mm |
| Revolutions per mile (calculated, unloaded) | 651.1 | 405 per km |
| Revolutions per mile (published by manufacturers) | 670–671 | 416–417 per km |
| Approved wheel width | 9.5–11.0 | 241–279 mm |
Speedometer error after switching to 285/40R22
Questions about 285/40R22
What is 285/40R22 in inches?
30.98 inches tall, 11.22 inches wide, on a 22-inch wheel. Written in inches, that is roughly 31.0×11.2R22.
How much does a 285/40R22 tire weigh?
Between 33.3 lb and 42.1 lb for the 8 tires listed here. The lightest is the Michelin Pilot Sport 4 SUV (XL); the heaviest is the Toyo Proxes ST III (XL).
What wheel width do I need for 285/40R22?
Manufacturers approve 9.5–11.0″ wide wheels for this size.
How many revolutions per mile does a 285/40R22 make?
Published figures run 670–671 revolutions per mile. The calculated figure is 651.1, but manufacturers measure the tire under load, where it rolls on a smaller radius.
How much taller is 285/40R22 than 325/35R22?
0.02 inches taller on paper (30.98″ vs 30.96″), which raises the axle about 0.01″. Your speedometer will read about 0.1% slow.