TireSizeCheck

275/40R22

Overall diameter

30.66″

779 mm

Sidewall height

4.33″

110.0 mm

Tread width

275 mm

10.8″

Circumference

96.33″

8.0 ft

Revs per mile

658

409 per km

Wheel diameter

22″

aspect ratio 40%

Cross-section

Overall diameter
30.66″
Sidewall (each side)
4.33″
Wheel
22″

275/40R22 compared with other sizes

All 21 practical swaps involving 275/40R22 — diameter change, speedometer impact and a fit verdict for each.

Common questions

What is the overall diameter of a 275/40R22 tire?
A 275/40R22 tire is about 30.66″ (779 mm) in overall diameter, with a sidewall height of 110.0 mm and a circumference of 96.33″.
How many revolutions per mile does a 275/40R22 tire turn?
A 275/40R22 turns roughly 658 revolutions per mile (409 per kilometre). This is the number that determines speedometer and odometer accuracy when you change tire size.
What do the numbers in 275/40R22 mean?
275 is the tread width in millimetres, 40 is the aspect ratio — the sidewall height as a percentage of the tread width — and 22 is the wheel diameter in inches. So the sidewall is 275 × 40% = 110.0 mm tall.