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Tire size · 22-inch wheel · about 31.0x11.2R22

285/40R22 tire size

Overall diameter, nominal31.0 in

Estimate ±787 mm

A 285/40R22 tire is 31.0 in (787 mm) tall and 11.2 in (285 mm) wide on a 22-inch wheel, with a 4.5 in sidewall, and turns about 651 times a mile.

Stock on the Ram 1500 (2011), per their makers’ documents.

Width
11.2 in
Sidewall
4.5 in
Wheel
22 in
Revs per mile
651

01 / Dimensions

285/40R22 in inches and millimeters

What the size code works out to. A real tire of the size measures within about 1.5% of it, by brand, tread, wheel width and pressure.

285/40R22

Estimate ±
Overall diameter
31.0 in 787 mm30.5 to 31.4 in for real tires
Section width
11.2 in 285 mm
Sidewall height
4.5 in 114 mm
Wheel diameter
22 in 559 mm
Circumference
97.3 in 2,472 mm
Revolutions per mile
651 405 per km641 to 661

02 / Stock on

Vehicles that leave the factory on 285/40R22

Which configurations run it in which model years, printed the way each maker prints the size, and how it compares with the vehicle’s other stock sizes. A speedometer set for one of those reads off by the amount shown when you fit 285/40R22 instead.

  • Ram 1500Maker
    • 2011 · R/Tprinted 285/40R22

    Ram 1500 model years on 285/40R22:

    Its other stock sizes

    • 275/60R20 (2011 · Sport, Premium; Big Horn / Lone Star, Laramie, SLT, Outdoorsman, Lone Star with the P275/60R20 tires (2011 chart row)). 285/40R22 is 2.0 in shorter: with a speedometer set for 275/60R20 it reads 6.5% high, 56.3 mph at an indicated 60.
    • 275/70R17 (2011 · Big Horn / Lone Star, Laramie, ST 4.7L V8/5.7L HEMI V8 without eTorque, SLT, Outdoorsman, Lone Star with the LT275/70R17C tires (2011 chart row), with a package). 285/40R22 is 1.2 in shorter: with a speedometer set for 275/70R17 it reads 3.8% high, 57.8 mph at an indicated 60.
    • 265/70R17 (2011 · ST 3.7L V6/5.7L HEMI V8 without eTorque; Big Horn / Lone Star, Laramie, ST 4.7L V8/5.7L HEMI V8 without eTorque, SLT, Outdoorsman, Lone Star with the P265/70R17 tires (2011 chart row)). 285/40R22 is 0.6 in shorter: with a speedometer set for 265/70R17 it reads 2.0% high, 58.8 mph at an indicated 60.

Documents last checked . How we read them and what the marks mean: how we source the numbers. A figure doesn’t match its document? Report a wrong number.

03 / Nearby sizes

Sizes either side of 285/40R22

The nearest common upsizes and the next sizes down on the same wheel, from the stock sizes we cover and the sizes owners usually step up to, and sizes about as tall on another wheel.

Nearest sizes up

Nearest sizes up, compared with 285/40R22
SizeTallinHeightvs 285/40R22Widthvs 285/40R22At an indicated 60true mphCompare
275/45R2231.7+0.8 in−0.4 in61.560.6 to 62.4Compare →
285/45R2232.1+1.1 in±0.0 in62.261.2 to 63.1Compare →
325/40R2232.2+1.3 in+1.6 in62.461.5 to 63.4Compare →

About as tall, other wheels

About as tall, other wheels, compared with 285/40R22
SizeTallinHeightvs 285/40R22Widthvs 285/40R22At an indicated 60true mphCompare
275/60R1831.0±0.0 in−0.4 in60.059.1 to 60.9Compare →
31x10.50R1531.0±0.0 in−0.7 in60.059.1 to 60.9Compare →
255/55R2031.0+0.1 in−1.2 in60.159.2 to 61.0Compare →
255/65R1831.1+0.1 in−1.2 in60.159.2 to 61.0Compare →

04 / Next

Compare it with your size

Tire size calculator285/40R22 against 275/45R22, or any two sizes: height, speedometer and gearing.Compare sizesTire sizes by vehicleEvery stock size on the trucks and SUVs we cover.Browse sizesRam 1500 tiresStock tires and wheels by trim, and what bigger tires change on the Ram 1500.See the tires

05 / FAQ

Questions people ask

What is 285/40R22 in inches?

About 31.0x11.2R22: 31.0 in tall and 11.2 in wide on a 22-inch wheel.

Which vehicles come with 285/40R22 tires?

In our data: Ram 1500 (2011).

How does 285/40R22 compare with the Ram 1500’s other stock sizes?

285/40R22 is 2.0 in shorter: with a speedometer set for 275/60R20 it reads 6.5% high, 56.3 mph at an indicated 60. 285/40R22 is 1.2 in shorter: with a speedometer set for 275/70R17 it reads 3.8% high, 57.8 mph at an indicated 60. 285/40R22 is 0.6 in shorter: with a speedometer set for 265/70R17 it reads 2.0% high, 58.8 mph at an indicated 60.

What is the next size up from 285/40R22?

275/45R22: about 0.8 in taller and 0.4 in narrower. On a speedometer set for 285/40R22 it reads 2.4% low (61.5 mph at an indicated 60).