145R13 tire size
145R13 is a metric size: 22.4" tall, 5.7" wide, on a 13" rim — about a 22.5x5.50R13. The sidewall is 4.7" and the tire turns 902 times per mile.
145R13 specs
| Overall diameter (height) | 22.36" · 568 mm |
|---|---|
| Section width | 5.71" · 145 mm |
| Sidewall height | 4.68" · 119 mm (82% of width) |
| Rim diameter | 13" |
| Circumference | 70.25" · 1.784 m |
| Revolutions per mile | 902 (560 per km) |
| Inch (flotation) equivalent | 22.5x5.50R13 |
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 | |
|---|---|---|---|---|---|
| 175/70R13 | 22.65" | +1.27% | +30 mm | 60.8 mph | calculate → |
| 205/60R13 | 22.69" | +1.44% | +60 mm | 60.9 mph | calculate → |
| 155/80R13 | 22.76" | +1.80% | +10 mm | 61.1 mph | calculate → |
| 185/60R13 | 21.74" | -2.78% | +40 mm | 58.3 mph | calculate → |
| 185/65R13 | 22.47" | +0.48% | +40 mm | 60.3 mph | calculate → |
| 22x8.00R13 | 22.00" | -1.62% | +58 mm | 59.0 mph | calculate → |
| 175/65R13 | 21.96" | -1.81% | +30 mm | 58.9 mph | calculate → |
| 225/50R13 | 21.86" | -2.25% | +80 mm | 58.6 mph | calculate → |
Try another size against 145R13
Questions
What size is 145R13 in inches?
145R13 is about 22.4" tall and 5.7" wide on a 13-inch rim — roughly a 22.5x5.50R13 in inch sizing.
What does 145R13 mean?
145 mm section width, sidewall 82% of the width (4.68"), radial construction, 13-inch rim.
What tire sizes are equivalent to 145R13?
On the same 13" rim, within 3% of the diameter: 185/65R13 (+0.48%), 175/70R13 (+1.27%), 205/60R13 (+1.44%), 22x8.00R13 (-1.62%), 155/80R13 (+1.80%), 175/65R13 (-1.81%).
How many revolutions per mile does a 145R13 tire make?
About 902 revolutions per mile (circumference 70.3").
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.