185/75R14 tire size
185/75R14 is a metric size: 24.9" tall, 7.3" wide, on a 14" rim — about a 25x7.50R14. The sidewall is 5.5" and the tire turns 809 times per mile.
185/75R14 specs
| Overall diameter (height) | 24.93" · 633 mm |
|---|---|
| Section width | 7.28" · 185 mm |
| Sidewall height | 5.46" · 139 mm (75% of width) |
| Rim diameter | 14" |
| Circumference | 78.30" · 1.989 m |
| Revolutions per mile | 809 (503 per km) |
| Inch (flotation) equivalent | 25x7.50R14 |
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 | |
|---|---|---|---|---|---|
| 195/70R14 | 24.75" | -0.71% | +10 mm | 59.6 mph | calculate → |
| 185/70R14 | 24.20" | -2.92% | 0 mm | 58.2 mph | calculate → |
| 195/75R14 | 25.52" | +2.37% | +10 mm | 61.4 mph | calculate → |
| 205/70R14 | 25.30" | +1.50% | +20 mm | 60.9 mph | calculate → |
| 235/60R14 | 25.10" | +0.71% | +50 mm | 60.4 mph | calculate → |
| 225/60R14 | 24.63" | -1.18% | +40 mm | 59.3 mph | calculate → |
| 245/60R14 | 25.57" | +2.61% | +60 mm | 61.6 mph | calculate → |
| 175R14 | 25.30" | +1.50% | -10 mm | 60.9 mph | calculate → |
| 165/80R14 | 24.39" | -2.13% | -20 mm | 58.7 mph | calculate → |
Try another size against 185/75R14
Questions
What size is 185/75R14 in inches?
185/75R14 is about 24.9" tall and 7.3" wide on a 14-inch rim — roughly a 25x7.50R14 in inch sizing.
What does 185/75R14 mean?
185 mm section width, sidewall 75% of the width (5.46"), radial construction, 14-inch rim.
What tire sizes are equivalent to 185/75R14?
On the same 14" rim, within 3% of the diameter: 235/60R14 (+0.71%), 195/70R14 (-0.71%), 225/60R14 (-1.18%), 175R14 (+1.50%), 205/70R14 (+1.50%), 165/80R14 (-2.13%).
How many revolutions per mile does a 185/75R14 tire make?
About 809 revolutions per mile (circumference 78.3").
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.