225/85R14 tire size
225/85R14 is a metric size: 29.1" tall, 8.9" wide, on a 14" rim — about a 29x9.00R14. The sidewall is 7.5" and the tire turns 694 times per mile.
225/85R14 specs
| Overall diameter (height) | 29.06" · 738 mm |
|---|---|
| Section width | 8.86" · 225 mm |
| Sidewall height | 7.53" · 191 mm (85% of width) |
| Rim diameter | 14" |
| Circumference | 91.29" · 2.319 m |
| Revolutions per mile | 694 (431 per km) |
| Inch (flotation) equivalent | 29x9.00R14 |
Equivalent sizes on a 14" rim
Sizes within ±5% of the overall diameter. Green rows are inside the usual ±3% limit for keeping the speedometer, ABS and gearing right; red rows are bigger changes that need clearance checks.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 29x9.00R14 | 29.00" | -0.20% | +4 mm | 59.9 mph | calculate → |
| 29x11.00R14 | 29.00" | -0.20% | +54 mm | 59.9 mph | calculate → |
Try another size against 225/85R14
Questions
What size is 225/85R14 in inches?
225/85R14 is about 29.1" tall and 8.9" wide on a 14-inch rim — roughly a 29x9.00R14 in inch sizing.
What does 225/85R14 mean?
225 mm section width, sidewall 85% of the width (7.53"), radial construction, 14-inch rim.
What tire sizes are equivalent to 225/85R14?
On the same 14" rim, within 3% of the diameter: 29x11.00R14 (-0.20%), 29x9.00R14 (-0.20%).
How many revolutions per mile does a 225/85R14 tire make?
About 694 revolutions per mile (circumference 91.3").
How these numbers are computed
Diameter = rim + 2 × sidewall, sidewall = width × aspect ÷ 100, circumference = π × diameter, revolutions per mile = 63,360 ÷ circumference. Real tires differ by brand by a few tenths of an inch. Last reviewed October 14, 2026.