185/80R13 tire size
185/80R13 is a metric size: 24.7" tall, 7.3" wide, on a 13" rim — about a 24.5x7.50R13. The sidewall is 5.8" and the tire turns 818 times per mile.
185/80R13 specs
| Overall diameter (height) | 24.65" · 626 mm |
|---|---|
| Section width | 7.28" · 185 mm |
| Sidewall height | 5.83" · 148 mm (80% of width) |
| Rim diameter | 13" |
| Circumference | 77.45" · 1.967 m |
| Revolutions per mile | 818 (508 per km) |
| Inch (flotation) equivalent | 24.5x7.50R13 |
Equivalent sizes on a 13" 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 | |
|---|---|---|---|---|---|
| 175/80R13 | 24.02" | -2.56% | -10 mm | 58.5 mph | calculate → |
| 24.5x8.00R13 | 24.50" | -0.62% | +18 mm | 59.6 mph | calculate → |
| 24.5x9.00R13 | 24.50" | -0.62% | +44 mm | 59.6 mph | calculate → |
Try another size against 185/80R13
Questions
What size is 185/80R13 in inches?
185/80R13 is about 24.7" tall and 7.3" wide on a 13-inch rim — roughly a 24.5x7.50R13 in inch sizing.
What does 185/80R13 mean?
185 mm section width, sidewall 80% of the width (5.83"), radial construction, 13-inch rim.
What tire sizes are equivalent to 185/80R13?
On the same 13" rim, within 3% of the diameter: 24.5x8.00R13 (-0.62%), 24.5x9.00R13 (-0.62%), 175/80R13 (-2.56%).
How many revolutions per mile does a 185/80R13 tire make?
About 818 revolutions per mile (circumference 77.5").
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.