285/35R22 Tire Size in Inches

Diameter, width, sidewall and the closest equivalent sizes, computed from the size code.

285/35R22
29.9" tall × 11.2" wide
On a 22-inch wheel · roughly 29.9x11.2R22 in flotation sizing
MeasurementInchesMillimetres
Overall diameter29.85758
Section width11.22285
Sidewall height3.9399.8
Wheel diameter22559
Circumference93.82382
Revolutions per mile676 (420 per km)

What 285/35R22 means

285 is the section width in millimetres (11.2 in). 35 is the aspect ratio: the sidewall is 35% as tall as the tire is wide, which works out to 99.8 mm or 3.9 in. R22 is a radial tire for a 22-inch wheel.

Overall diameter is the wheel plus two sidewalls: 22 + 2 × 3.93 = 29.9 inches. These are the nominal dimensions every maker builds to; a real 285/35R22 can measure a few tenths of an inch differently by model and inflation.

Closest equivalent sizes

Common sizes within the usual 3% of 285/35R22's overall diameter. Confirm load index, speed rating and rim width before swapping.

SizeDiameterWidthChangeSpeedometer at 60
235/75R16 new wheels 29.9 in 9.3 in +0.1% really 60.0 mph
235/70R17 new wheels 30.0 in 9.3 in +0.3% really 60.2 mph
275/45R20 new wheels 29.7 in 10.8 in -0.4% really 59.8 mph
285/40R21 new wheels 30.0 in 11.2 in +0.4% really 60.2 mph
275/60R17 new wheels 30.0 in 10.8 in +0.5% really 60.3 mph
245/45R21 new wheels 29.7 in 9.6 in -0.6% really 59.7 mph

Speedometer if you switch to 235/75R16

Your speedometer stays calibrated for 285/35R22. With a taller tire you travel faster than it shows.

Speedometer readsTrue speed
30 mph30.0 mph
45 mph45.0 mph
55 mph55.0 mph
65 mph65.1 mph
75 mph75.1 mph
Compare 285/35R22 with any size →

Shop 285/35R22 tires

Check the load index and speed rating on your door-jamb placard before you buy, especially for LT tires used for towing.

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Frequently Asked Questions

A 285/35R22 tire is 29.9 inches (758 mm) tall overall. That is the 22-inch wheel plus two sidewalls of 3.9 inches each (35% of the 285 mm section width). Expect a real tire to measure within a few tenths of an inch of this, depending on the model and inflation.

The section width is 285 mm, or 11.2 inches, measured sidewall to sidewall on the recommended rim width. The tread itself is narrower than that. In flotation sizing, 285/35R22 is roughly a 29.9x11.2R22.

235/75R16 is the closest common size, at +0.1% overall diameter (29.9 in against 29.9 in). Most makers treat about 3% as the limit for a swap without speedometer or clearance problems, but always confirm load index, speed rating and wheel width before changing size.

About 676 revolutions per mile (420 per kilometre), from its 29.9-inch rolling diameter. Real-world figures run slightly higher because a loaded tire squats. This number is what your speedometer and odometer are calibrated against.

Last updated: October 2, 2026

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Other 22-inch sizes

265/40R22 275/40R22 285/40R22 285/45R22 305/40R22 255/30R22 265/35R22 295/30R22 305/45R22