275/25R20 tire size
275/25R20 is a metric size: 25.4" tall, 10.8" wide, on a 20" rim — about a 25.5x11.00R20. The sidewall is 2.7" and the tire turns 794 times per mile.
275/25R20 specs
| Overall diameter (height) | 25.41" · 645 mm |
|---|---|
| Section width | 10.83" · 275 mm |
| Sidewall height | 2.71" · 69 mm (25% of width) |
| Rim diameter | 20" |
| Circumference | 79.84" · 2.028 m |
| Revolutions per mile | 794 (493 per km) |
| Inch (flotation) equivalent | 25.5x11.00R20 |
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 | |
|---|---|---|---|---|---|
| 275/30R20 common | 26.50" | +4.26% | 0 mm | 62.6 mph | calculate → |
| 235/35R20 | 26.48" | +4.18% | -40 mm | 62.5 mph | calculate → |
| 245/30R20 | 25.79" | +1.47% | -30 mm | 60.9 mph | calculate → |
| 265/30R20 | 26.26" | +3.33% | -10 mm | 62.0 mph | calculate → |
| 255/30R20 | 26.02" | +2.40% | -20 mm | 61.4 mph | calculate → |
| 225/35R20 | 26.20" | +3.10% | -50 mm | 61.9 mph | calculate → |
| 335/25R20 | 26.59" | +4.65% | +60 mm | 62.8 mph | calculate → |
| 235/30R20 | 25.55" | +0.54% | -40 mm | 60.3 mph | calculate → |
| 305/25R20 | 26.00" | +2.32% | +30 mm | 61.4 mph | calculate → |
| 295/25R20 | 25.81" | +1.55% | +20 mm | 60.9 mph | calculate → |
| 325/25R20 | 26.40" | +3.87% | +50 mm | 62.3 mph | calculate → |
| 285/25R20 | 25.61" | +0.77% | +10 mm | 60.5 mph | calculate → |
| 225/30R20 | 25.31" | -0.39% | -50 mm | 59.8 mph | calculate → |
| 215/30R20 | 25.08" | -1.32% | -60 mm | 59.2 mph | calculate → |
| 315/25R20 | 26.20" | +3.10% | +40 mm | 61.9 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 | |
|---|---|---|---|---|---|
| 235/35R19 common | 25.48" | +0.25% | -40 mm | 60.1 mph | calculate → |
| 225/35R19 | 25.20" | -0.84% | -50 mm | 59.5 mph | calculate → |
| 275/30R19 | 25.50" | +0.33% | 0 mm | 60.2 mph | calculate → |
| 265/30R19 | 25.26" | -0.60% | -10 mm | 59.6 mph | calculate → |
| 315/25R19 | 25.20" | -0.84% | +40 mm | 59.5 mph | calculate → |
| 275/20R21 | 25.33" | -0.33% | 0 mm | 59.8 mph | calculate → |
Try another size against 275/25R20
Questions
What size is 275/25R20 in inches?
275/25R20 is about 25.4" tall and 10.8" wide on a 20-inch rim — roughly a 25.5x11.00R20 in inch sizing.
What does 275/25R20 mean?
275 mm section width, sidewall 25% of the width (2.71"), radial construction, 20-inch rim.
What tire sizes are equivalent to 275/25R20?
On the same 20" rim, within 3% of the diameter: 225/30R20 (-0.39%), 235/30R20 (+0.54%), 285/25R20 (+0.77%), 215/30R20 (-1.32%), 245/30R20 (+1.47%), 295/25R20 (+1.55%).
How many revolutions per mile does a 275/25R20 tire make?
About 794 revolutions per mile (circumference 79.8").
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.