185/65R13 tire size
185/65R13 is a metric size: 22.5" tall, 7.3" wide, on a 13" rim — about a 22.5x7.50R13. The sidewall is 4.7" and the tire turns 898 times per mile.
185/65R13 specs
| Overall diameter (height) | 22.47" · 571 mm |
|---|---|
| Section width | 7.28" · 185 mm |
| Sidewall height | 4.73" · 120 mm (65% of width) |
| Rim diameter | 13" |
| Circumference | 70.59" · 1.793 m |
| Revolutions per mile | 898 (558 per km) |
| Inch (flotation) equivalent | 22.5x7.50R13 |
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 | |
|---|---|---|---|---|---|
| 175/70R13 | 22.65" | +0.79% | -10 mm | 60.5 mph | calculate → |
| 205/60R13 | 22.69" | +0.96% | +20 mm | 60.6 mph | calculate → |
| 155/80R13 | 22.76" | +1.31% | -30 mm | 60.8 mph | calculate → |
| 22x8.00R13 | 22.00" | -2.09% | +18 mm | 58.7 mph | calculate → |
| 175/65R13 | 21.96" | -2.28% | -10 mm | 58.6 mph | calculate → |
| 225/50R13 | 21.86" | -2.72% | +40 mm | 58.4 mph | calculate → |
| 145R13 | 22.36" | -0.47% | -40 mm | 59.7 mph | calculate → |
Try another size against 185/65R13
Questions
What size is 185/65R13 in inches?
185/65R13 is about 22.5" tall and 7.3" wide on a 13-inch rim — roughly a 22.5x7.50R13 in inch sizing.
What does 185/65R13 mean?
185 mm section width, sidewall 65% of the width (4.73"), radial construction, 13-inch rim.
What tire sizes are equivalent to 185/65R13?
On the same 13" rim, within 3% of the diameter: 145R13 (-0.47%), 175/70R13 (+0.79%), 205/60R13 (+0.96%), 155/80R13 (+1.31%), 22x8.00R13 (-2.09%), 175/65R13 (-2.28%).
How many revolutions per mile does a 185/65R13 tire make?
About 898 revolutions per mile (circumference 70.6").
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.