215/75R14 Tire Size in Inches

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

215/75R14
26.7" tall × 8.5" wide
On a 14-inch wheel · roughly 26.7x8.5R14 in flotation sizing
MeasurementInchesMillimetres
Overall diameter26.70678
Section width8.46215
Sidewall height6.35161.2
Wheel diameter14356
Circumference83.92130
Revolutions per mile755 (469 per km)

What 215/75R14 means

215 is the section width in millimetres (8.5 in). 75 is the aspect ratio: the sidewall is 75% as tall as the tire is wide, which works out to 161.2 mm or 6.3 in. R14 is a radial tire for a 14-inch wheel.

Overall diameter is the wheel plus two sidewalls: 14 + 2 × 6.35 = 26.7 inches. These are the nominal dimensions every maker builds to; a real 215/75R14 can measure a few tenths of an inch differently by model and inflation.

Closest equivalent sizes

Common sizes within the usual 3% of 215/75R14's overall diameter. Confirm load index, speed rating and rim width before swapping.

SizeDiameterWidthChangeSpeedometer at 60
245/45R18 new wheels 26.7 in 9.6 in -0.1% really 60.0 mph
245/40R19 new wheels 26.7 in 9.6 in +0.1% really 60.0 mph
275/40R18 new wheels 26.7 in 10.8 in -0.1% really 59.9 mph
225/55R17 new wheels 26.7 in 8.9 in +0.2% really 60.1 mph
245/35R20 new wheels 26.8 in 9.6 in +0.2% really 60.1 mph
225/60R16 new wheels 26.6 in 8.9 in -0.3% really 59.8 mph

Speedometer if you switch to 245/45R18

Your speedometer stays calibrated for 215/75R14. With a shorter tire you travel slower than it shows.

Speedometer readsTrue speed
30 mph30.0 mph
45 mph45.0 mph
55 mph55.0 mph
65 mph65.0 mph
75 mph75.0 mph
Compare 215/75R14 with any size →

Shop 215/75R14 tires

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

See 215/75R14 tires on Amazon →

As an Amazon Associate we earn from qualifying purchases.

Frequently Asked Questions

A 215/75R14 tire is 26.7 inches (678 mm) tall overall. That is the 14-inch wheel plus two sidewalls of 6.3 inches each (75% of the 215 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 215 mm, or 8.5 inches, measured sidewall to sidewall on the recommended rim width. The tread itself is narrower than that. In flotation sizing, 215/75R14 is roughly a 26.7x8.5R14.

245/45R18 is the closest common size, at -0.1% overall diameter (26.7 in against 26.7 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 755 revolutions per mile (469 per kilometre), from its 26.7-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

Compare any sizes

The full calculator compares up to three sizes with speedometer error, clearance change and a to-scale diagram.

Open the tire size calculator

Other 14-inch sizes

175/65R14 185/60R14 185/65R14 185/70R14 195/60R14 195/70R14 195/75R14 205/70R14 205/75R14