325/50R20 tire size
325/50R20 is a metric size: 32.8" tall, 12.8" wide, on a 20" rim — about a 33x13.00R20. The sidewall is 6.4" and the tire turns 615 times per mile.
325/50R20 specs
| Overall diameter (height) | 32.80" · 833 mm |
|---|---|
| Section width | 12.80" · 325 mm |
| Sidewall height | 6.40" · 163 mm (50% of width) |
| Rim diameter | 20" |
| Circumference | 103.03" · 2.617 m |
| Revolutions per mile | 615 (382 per km) |
| Inch (flotation) equivalent | 33x13.00R20 |
Equivalent sizes on a 20" 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 | |
|---|---|---|---|---|---|
| 275/55R20 common | 31.91" | -2.70% | -50 mm | 58.4 mph | calculate → |
| 275/60R20 common | 32.99" | +0.60% | -50 mm | 60.4 mph | calculate → |
| 275/65R20 common | 34.07" | +3.90% | -50 mm | 62.3 mph | calculate → |
| 265/60R20 common | 32.52" | -0.84% | -60 mm | 59.5 mph | calculate → |
| 305/55R20 common | 33.21" | +1.26% | -20 mm | 60.8 mph | calculate → |
| 285/55R20 common | 32.34" | -1.38% | -40 mm | 59.2 mph | calculate → |
| 285/60R20 common | 33.46" | +2.04% | -40 mm | 61.2 mph | calculate → |
| 33x12.50R20 common | 33.00" | +0.62% | -7 mm | 60.4 mph | calculate → |
| 295/60R20 | 33.94" | +3.48% | -30 mm | 62.1 mph | calculate → |
| 295/55R20 | 32.78" | -0.06% | -30 mm | 60.0 mph | calculate → |
| 285/50R20 | 31.22" | -4.80% | -40 mm | 57.1 mph | calculate → |
| 245/60R20 | 31.57" | -3.72% | -80 mm | 57.8 mph | calculate → |
| 305/50R20 | 32.01" | -2.40% | -20 mm | 58.6 mph | calculate → |
| 255/60R20 | 32.05" | -2.28% | -70 mm | 58.6 mph | calculate → |
| 33x13.50R20 | 33.00" | +0.62% | +18 mm | 60.4 mph | calculate → |
| 33x11.50R20 | 33.00" | +0.62% | -33 mm | 60.4 mph | calculate → |
| 33x12.00R20 | 33.00" | +0.62% | -20 mm | 60.4 mph | calculate → |
| 33x22.00R20 | 33.00" | +0.62% | +234 mm | 60.4 mph | calculate → |
| 375/45R20 | 33.29" | +1.50% | +50 mm | 60.9 mph | calculate → |
| 34x11.50R20 | 34.00" | +3.67% | -33 mm | 62.2 mph | calculate → |
| 265/55R20 | 31.48" | -4.02% | -60 mm | 57.6 mph | calculate → |
| 305/60R20 | 34.41" | +4.92% | -20 mm | 63.0 mph | calculate → |
| 33x14.50R20 | 33.00" | +0.62% | +43 mm | 60.4 mph | calculate → |
| 315/50R20 | 32.40" | -1.20% | -10 mm | 59.3 mph | calculate → |
| 355/50R20 | 33.98" | +3.60% | +30 mm | 62.2 mph | calculate → |
| 295/50R20 | 31.61" | -3.60% | -30 mm | 57.8 mph | calculate → |
Plus / minus sizing: 19" and 21" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 275/55R21 | 32.91" | +0.35% | -50 mm | 60.2 mph | calculate → |
Try another size against 325/50R20
Questions
What size is 325/50R20 in inches?
325/50R20 is about 32.8" tall and 12.8" wide on a 20-inch rim — roughly a 33x13.00R20 in inch sizing.
What does 325/50R20 mean?
325 mm section width, sidewall 50% of the width (6.40"), radial construction, 20-inch rim.
What tire sizes are equivalent to 325/50R20?
On the same 20" rim, within 3% of the diameter: 295/55R20 (-0.06%), 275/60R20 (+0.60%), 33x11.50R20 (+0.62%), 33x12.50R20 (+0.62%), 33x12.00R20 (+0.62%), 33x13.50R20 (+0.62%).
How many revolutions per mile does a 325/50R20 tire make?
About 615 revolutions per mile (circumference 103.0").
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.