145/65R15 tire size
145/65R15 is a metric size: 22.4" tall, 5.7" wide, on a 15" rim — about a 22.5x5.50R15. The sidewall is 3.7" and the tire turns 900 times per mile.
145/65R15 specs
| Overall diameter (height) | 22.42" · 570 mm |
|---|---|
| Section width | 5.71" · 145 mm |
| Sidewall height | 3.71" · 94 mm (65% of width) |
| Rim diameter | 15" |
| Circumference | 70.44" · 1.789 m |
| Revolutions per mile | 900 (559 per km) |
| Inch (flotation) equivalent | 22.5x5.50R15 |
Equivalent sizes on a 15" 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 | |
|---|---|---|---|---|---|
| 205/50R15 | 23.07" | +2.90% | +60 mm | 61.7 mph | calculate → |
| 185/55R15 | 23.01" | +2.63% | +40 mm | 61.6 mph | calculate → |
| 195/55R15 | 23.44" | +4.57% | +50 mm | 62.7 mph | calculate → |
| 195/50R15 | 22.68" | +1.14% | +50 mm | 60.7 mph | calculate → |
| 225/45R15 | 22.97" | +2.46% | +80 mm | 61.5 mph | calculate → |
| 245/40R15 | 22.72" | +1.32% | +100 mm | 60.8 mph | calculate → |
| 175/55R15 | 22.58" | +0.70% | +30 mm | 60.4 mph | calculate → |
| 155/60R15 | 22.32" | -0.44% | +10 mm | 59.7 mph | calculate → |
| 275/35R15 | 22.58" | +0.70% | +130 mm | 60.4 mph | calculate → |
| 165/60R15 | 22.80" | +1.67% | +20 mm | 61.0 mph | calculate → |
| 195/45R15 | 21.91" | -2.28% | +50 mm | 58.6 mph | calculate → |
| 295/35R15 | 23.13" | +3.16% | +150 mm | 61.9 mph | calculate → |
| 22x8.00R15 | 22.00" | -1.88% | +58 mm | 58.9 mph | calculate → |
| 175/60R15 | 23.27" | +3.78% | +30 mm | 62.3 mph | calculate → |
| 165/50R15 | 21.50" | -4.13% | +20 mm | 57.5 mph | calculate → |
| 165/65R15 | 23.44" | +4.57% | +20 mm | 62.7 mph | calculate → |
| 175/50R15 | 21.89" | -2.37% | +30 mm | 58.6 mph | calculate → |
| 215/50R15 | 23.46" | +4.65% | +70 mm | 62.8 mph | calculate → |
Plus / minus sizing: 14" and 16" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 165/65R14 | 22.44" | +0.11% | +20 mm | 60.1 mph | calculate → |
| 205/40R16 | 22.46" | +0.16% | +60 mm | 60.1 mph | calculate → |
| 175/60R14 | 22.27" | -0.68% | +30 mm | 59.6 mph | calculate → |
| 195/55R14 | 22.44" | +0.11% | +50 mm | 60.1 mph | calculate → |
Try another size against 145/65R15
Questions
What size is 145/65R15 in inches?
145/65R15 is about 22.4" tall and 5.7" wide on a 15-inch rim — roughly a 22.5x5.50R15 in inch sizing.
What does 145/65R15 mean?
145 mm section width, sidewall 65% of the width (3.71"), radial construction, 15-inch rim.
What tire sizes are equivalent to 145/65R15?
On the same 15" rim, within 3% of the diameter: 155/60R15 (-0.44%), 175/55R15 (+0.70%), 275/35R15 (+0.70%), 195/50R15 (+1.14%), 245/40R15 (+1.32%), 165/60R15 (+1.67%).
How many revolutions per mile does a 145/65R15 tire make?
About 900 revolutions per mile (circumference 70.4").
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.