325/25R20 tire size
325/25R20 is a metric size: 26.4" tall, 12.8" wide, on a 20" rim — about a 26.5x13.00R20. The sidewall is 3.2" and the tire turns 764 times per mile.
325/25R20 specs
| Overall diameter (height) | 26.40" · 671 mm |
|---|---|
| Section width | 12.80" · 325 mm |
| Sidewall height | 3.20" · 81 mm (25% of width) |
| Rim diameter | 20" |
| Circumference | 82.93" · 2.106 m |
| Revolutions per mile | 764 (475 per km) |
| Inch (flotation) equivalent | 26.5x13.00R20 |
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 | |
|---|---|---|---|---|---|
| 245/40R20 common | 27.72" | +5.00% | -80 mm | 63.0 mph | calculate → |
| 245/35R20 common | 26.75" | +1.34% | -80 mm | 60.8 mph | calculate → |
| 255/35R20 common | 27.03" | +2.39% | -70 mm | 61.4 mph | calculate → |
| 275/35R20 common | 27.58" | +4.47% | -50 mm | 62.7 mph | calculate → |
| 285/30R20 common | 26.73" | +1.27% | -40 mm | 60.8 mph | calculate → |
| 275/30R20 common | 26.50" | +0.37% | -50 mm | 60.2 mph | calculate → |
| 265/35R20 common | 27.30" | +3.43% | -60 mm | 62.1 mph | calculate → |
| 235/35R20 | 26.48" | +0.30% | -90 mm | 60.2 mph | calculate → |
| 295/30R20 | 26.97" | +2.16% | -30 mm | 61.3 mph | calculate → |
| 305/30R20 | 27.20" | +3.06% | -20 mm | 61.8 mph | calculate → |
| 245/30R20 | 25.79" | -2.31% | -80 mm | 58.6 mph | calculate → |
| 265/30R20 | 26.26" | -0.52% | -60 mm | 59.7 mph | calculate → |
| 255/30R20 | 26.02" | -1.42% | -70 mm | 59.1 mph | calculate → |
| 225/35R20 | 26.20" | -0.75% | -100 mm | 59.6 mph | calculate → |
| 335/25R20 | 26.59" | +0.75% | +10 mm | 60.4 mph | calculate → |
| 315/30R20 | 27.44" | +3.95% | -10 mm | 62.4 mph | calculate → |
| 235/30R20 | 25.55" | -3.21% | -90 mm | 58.1 mph | calculate → |
| 305/25R20 | 26.00" | -1.49% | -20 mm | 59.1 mph | calculate → |
| 235/40R20 | 27.40" | +3.80% | -90 mm | 62.3 mph | calculate → |
| 295/25R20 | 25.81" | -2.24% | -30 mm | 58.7 mph | calculate → |
| 285/25R20 | 25.61" | -2.98% | -40 mm | 58.2 mph | calculate → |
| 325/30R20 | 27.68" | +4.85% | 0 mm | 62.9 mph | calculate → |
| 215/45R20 | 27.62" | +4.62% | -110 mm | 62.8 mph | calculate → |
| 345/25R20 | 26.79" | +1.49% | +20 mm | 60.9 mph | calculate → |
| 225/30R20 | 25.31" | -4.10% | -100 mm | 57.5 mph | calculate → |
| 225/40R20 | 27.09" | +2.61% | -100 mm | 61.6 mph | calculate → |
| 195/50R20 | 27.68" | +4.85% | -130 mm | 62.9 mph | calculate → |
| 145/60R20 | 26.85" | +1.72% | -180 mm | 61.0 mph | calculate → |
| 155/60R20 | 27.32" | +3.50% | -170 mm | 62.1 mph | calculate → |
| 275/25R20 | 25.41" | -3.73% | -50 mm | 57.8 mph | calculate → |
| 145/65R20 | 27.42" | +3.88% | -180 mm | 62.3 mph | calculate → |
| 175/55R20 | 27.58" | +4.47% | -150 mm | 62.7 mph | calculate → |
| 315/25R20 | 26.20" | -0.75% | -10 mm | 59.6 mph | calculate → |
| 215/30R20 | 25.08" | -5.00% | -110 mm | 57.0 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 | |
|---|---|---|---|---|---|
| 235/40R19 common | 26.40" | +0.01% | -90 mm | 60.0 mph | calculate → |
| 275/35R19 common | 26.58" | +0.69% | -50 mm | 60.4 mph | calculate → |
| 265/35R19 common | 26.30" | -0.36% | -60 mm | 59.8 mph | calculate → |
| 305/30R19 | 26.20" | -0.73% | -20 mm | 59.6 mph | calculate → |
| 315/30R19 | 26.44" | +0.16% | -10 mm | 60.1 mph | calculate → |
| 275/25R21 | 26.41" | +0.06% | -50 mm | 60.0 mph | calculate → |
Try another size against 325/25R20
Questions
What size is 325/25R20 in inches?
325/25R20 is about 26.4" tall and 12.8" wide on a 20-inch rim — roughly a 26.5x13.00R20 in inch sizing.
What does 325/25R20 mean?
325 mm section width, sidewall 25% of the width (3.20"), radial construction, 20-inch rim.
What tire sizes are equivalent to 325/25R20?
On the same 20" rim, within 3% of the diameter: 235/35R20 (+0.30%), 275/30R20 (+0.37%), 265/30R20 (-0.52%), 335/25R20 (+0.75%), 225/35R20 (-0.75%), 315/25R20 (-0.75%).
How many revolutions per mile does a 325/25R20 tire make?
About 764 revolutions per mile (circumference 82.9").
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.