195/45R15 tire size
195/45R15 is a metric size: 21.9" tall, 7.7" wide, on a 15" rim — about a 22x7.50R15. The sidewall is 3.5" and the tire turns 921 times per mile.
195/45R15 specs
| Overall diameter (height) | 21.91" · 557 mm |
|---|---|
| Section width | 7.68" · 195 mm |
| Sidewall height | 3.45" · 88 mm (45% of width) |
| Rim diameter | 15" |
| Circumference | 68.83" · 1.748 m |
| Revolutions per mile | 921 (572 per km) |
| Inch (flotation) equivalent | 22x7.50R15 |
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 | |
|---|---|---|---|---|---|
| 195/50R15 | 22.68" | +3.50% | 0 mm | 62.1 mph | calculate → |
| 225/45R15 | 22.97" | +4.85% | +30 mm | 62.9 mph | calculate → |
| 245/40R15 | 22.72" | +3.68% | +50 mm | 62.2 mph | calculate → |
| 175/55R15 | 22.58" | +3.05% | -20 mm | 61.8 mph | calculate → |
| 155/60R15 | 22.32" | +1.89% | -40 mm | 61.1 mph | calculate → |
| 145/65R15 | 22.42" | +2.34% | -50 mm | 61.4 mph | calculate → |
| 275/35R15 | 22.58" | +3.05% | +80 mm | 61.8 mph | calculate → |
| 165/60R15 | 22.80" | +4.04% | -30 mm | 62.4 mph | calculate → |
| 22x8.00R15 | 22.00" | +0.41% | +8 mm | 60.2 mph | calculate → |
| 165/50R15 | 21.50" | -1.89% | -30 mm | 58.9 mph | calculate → |
| 175/50R15 | 21.89" | -0.09% | -20 mm | 59.9 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 | |
|---|---|---|---|---|---|
| 185/55R14 | 22.01" | +0.47% | -10 mm | 60.3 mph | calculate → |
| 215/35R16 | 21.93" | +0.07% | +20 mm | 60.0 mph | calculate → |
| 165/60R14 | 21.80" | -0.52% | -30 mm | 59.7 mph | calculate → |
| 205/50R14 | 22.07" | +0.74% | +10 mm | 60.4 mph | calculate → |
Try another size against 195/45R15
Questions
What size is 195/45R15 in inches?
195/45R15 is about 21.9" tall and 7.7" wide on a 15-inch rim — roughly a 22x7.50R15 in inch sizing.
What does 195/45R15 mean?
195 mm section width, sidewall 45% of the width (3.45"), radial construction, 15-inch rim.
What tire sizes are equivalent to 195/45R15?
On the same 15" rim, within 3% of the diameter: 175/50R15 (-0.09%), 22x8.00R15 (+0.41%), 165/50R15 (-1.89%), 155/60R15 (+1.89%), 145/65R15 (+2.34%), 175/55R15 (+3.05%).
How many revolutions per mile does a 195/45R15 tire make?
About 921 revolutions per mile (circumference 68.8").
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.