325/50R15 tire size
325/50R15 is a metric size: 27.8" tall, 12.8" wide, on a 15" rim — about a 28x13.00R15. The sidewall is 6.4" and the tire turns 726 times per mile.
325/50R15 specs
| Overall diameter (height) | 27.80" · 706 mm |
|---|---|
| Section width | 12.80" · 325 mm |
| Sidewall height | 6.40" · 163 mm (50% of width) |
| Rim diameter | 15" |
| Circumference | 87.32" · 2.218 m |
| Revolutions per mile | 726 (451 per km) |
| Inch (flotation) equivalent | 28x13.00R15 |
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 | |
|---|---|---|---|---|---|
| 235/75R15 common | 28.88" | +3.90% | -90 mm | 62.3 mph | calculate → |
| 215/70R15 | 26.85" | -3.40% | -110 mm | 58.0 mph | calculate → |
| 215/75R15 | 27.70" | -0.35% | -110 mm | 59.8 mph | calculate → |
| 225/70R15 | 27.40" | -1.42% | -100 mm | 59.2 mph | calculate → |
| 225/75R15 | 28.29" | +1.77% | -100 mm | 61.1 mph | calculate → |
| 235/70R15 | 27.95" | +0.57% | -90 mm | 60.3 mph | calculate → |
| 205/75R15 | 27.11" | -2.48% | -120 mm | 58.5 mph | calculate → |
| 255/70R15 | 29.06" | +4.53% | -70 mm | 62.7 mph | calculate → |
| 275/60R15 | 27.99" | +0.71% | -50 mm | 60.4 mph | calculate → |
| 255/60R15 | 27.05" | -2.69% | -70 mm | 58.4 mph | calculate → |
| 295/50R15 | 26.61" | -4.25% | -30 mm | 57.5 mph | calculate → |
| 245/60R15 | 26.57" | -4.39% | -80 mm | 57.4 mph | calculate → |
| 29x10.50R15 | 29.00" | +4.33% | -58 mm | 62.6 mph | calculate → |
| 295/55R15 | 27.78" | -0.07% | -30 mm | 60.0 mph | calculate → |
| 28x10.50R15 | 28.00" | +0.74% | -58 mm | 60.4 mph | calculate → |
| 28x11.50R15 | 28.00" | +0.74% | -33 mm | 60.4 mph | calculate → |
| 28x9.00R15 | 28.00" | +0.74% | -96 mm | 60.4 mph | calculate → |
| 28x10.00R15 | 28.00" | +0.74% | -71 mm | 60.4 mph | calculate → |
| 28x12.00R15 | 28.00" | +0.74% | -20 mm | 60.4 mph | calculate → |
| 28x6.00R15 | 28.00" | +0.74% | -173 mm | 60.4 mph | calculate → |
| 28x7.50R15 | 28.00" | +0.74% | -134 mm | 60.4 mph | calculate → |
| 27x9.50R15 | 27.00" | -2.86% | -84 mm | 58.3 mph | calculate → |
| 29x11.50R15 | 29.00" | +4.33% | -33 mm | 62.6 mph | calculate → |
| 29x15.00R15 | 29.00" | +4.33% | +56 mm | 62.6 mph | calculate → |
| 29x18.00R15 | 29.00" | +4.33% | +132 mm | 62.6 mph | calculate → |
| 29x8.50R15 | 29.00" | +4.33% | -109 mm | 62.6 mph | calculate → |
| 28x12.50R15 | 28.00" | +0.74% | -7 mm | 60.4 mph | calculate → |
| 28x13.50R15 | 28.00" | +0.74% | +18 mm | 60.4 mph | calculate → |
| 255/65R15 | 28.05" | +0.92% | -70 mm | 60.6 mph | calculate → |
| 245/70R15 | 28.50" | +2.55% | -80 mm | 61.5 mph | calculate → |
| 235/65R15 | 27.03" | -2.76% | -90 mm | 58.3 mph | calculate → |
| 27x10.50R15 | 27.00" | -2.86% | -58 mm | 58.3 mph | calculate → |
| 185R15 | 26.94" | -3.06% | -140 mm | 58.2 mph | calculate → |
| 29x12.50R15 | 29.00" | +4.33% | -7 mm | 62.6 mph | calculate → |
| 29x15.50R15 | 29.00" | +4.33% | +69 mm | 62.6 mph | calculate → |
| 29x18.50R15 | 29.00" | +4.33% | +145 mm | 62.6 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 | |
|---|---|---|---|---|---|
| 215/70R16 common | 27.85" | +0.20% | -110 mm | 60.1 mph | calculate → |
| 235/65R16 common | 28.03" | +0.84% | -90 mm | 60.5 mph | calculate → |
| 28x10.00R14 | 28.00" | +0.74% | -71 mm | 60.4 mph | calculate → |
| 28x11.00R14 | 28.00" | +0.74% | -46 mm | 60.4 mph | calculate → |
| 28x8.50R14 | 28.00" | +0.74% | -109 mm | 60.4 mph | calculate → |
| 295/50R16 | 27.61" | -0.65% | -30 mm | 59.6 mph | calculate → |
| 28x11.50R16 | 28.00" | +0.74% | -33 mm | 60.4 mph | calculate → |
| 255/60R16 | 28.05" | +0.91% | -70 mm | 60.5 mph | calculate → |
Try another size against 325/50R15
Questions
What size is 325/50R15 in inches?
325/50R15 is about 27.8" tall and 12.8" wide on a 15-inch rim — roughly a 28x13.00R15 in inch sizing.
What does 325/50R15 mean?
325 mm section width, sidewall 50% of the width (6.40"), radial construction, 15-inch rim.
What tire sizes are equivalent to 325/50R15?
On the same 15" rim, within 3% of the diameter: 295/55R15 (-0.07%), 215/75R15 (-0.35%), 235/70R15 (+0.57%), 275/60R15 (+0.71%), 28x10.50R15 (+0.74%), 28x10.00R15 (+0.74%).
How many revolutions per mile does a 325/50R15 tire make?
About 726 revolutions per mile (circumference 87.3").
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.