265/30R20 tire size
265/30R20 is a metric size: 26.3" tall, 10.4" wide, on a 20" rim — about a 26.5x10.50R20. The sidewall is 3.1" and the tire turns 768 times per mile.
265/30R20 specs
| Overall diameter (height) | 26.26" · 667 mm |
|---|---|
| Section width | 10.43" · 265 mm |
| Sidewall height | 3.13" · 80 mm (30% of width) |
| Rim diameter | 20" |
| Circumference | 82.50" · 2.095 m |
| Revolutions per mile | 768 (477 per km) |
| Inch (flotation) equivalent | 26.5x10.50R20 |
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 | |
|---|---|---|---|---|---|
| 245/35R20 common | 26.75" | +1.87% | -20 mm | 61.1 mph | compare → |
| 255/35R20 common | 27.03" | +2.92% | -10 mm | 61.8 mph | compare → |
| 285/30R20 common | 26.73" | +1.80% | +20 mm | 61.1 mph | compare → |
| 275/30R20 common | 26.50" | +0.90% | +10 mm | 60.5 mph | compare → |
| 265/35R20 common | 27.30" | +3.97% | 0 mm | 62.4 mph | compare → |
| 235/35R20 | 26.48" | +0.82% | -30 mm | 60.5 mph | compare → |
| 295/30R20 | 26.97" | +2.70% | +30 mm | 61.6 mph | compare → |
| 305/30R20 | 27.20" | +3.60% | +40 mm | 62.2 mph | compare → |
| 245/30R20 | 25.79" | -1.80% | -20 mm | 58.9 mph | compare → |
| 255/30R20 | 26.02" | -0.90% | -10 mm | 59.5 mph | compare → |
| 225/35R20 | 26.20" | -0.22% | -40 mm | 59.9 mph | compare → |
| 335/25R20 | 26.59" | +1.27% | +70 mm | 60.8 mph | compare → |
| 315/30R20 | 27.44" | +4.50% | +50 mm | 62.7 mph | compare → |
| 235/30R20 | 25.55" | -2.70% | -30 mm | 58.4 mph | compare → |
| 305/25R20 | 26.00" | -0.97% | +40 mm | 59.4 mph | compare → |
| 235/40R20 | 27.40" | +4.35% | -30 mm | 62.6 mph | calculate → |
| 295/25R20 | 25.81" | -1.72% | +30 mm | 59.0 mph | calculate → |
| 325/25R20 | 26.40" | +0.52% | +60 mm | 60.3 mph | calculate → |
| 285/25R20 | 25.61" | -2.47% | +20 mm | 58.5 mph | calculate → |
| 345/25R20 | 26.79" | +2.02% | +80 mm | 61.2 mph | calculate → |
| 225/30R20 | 25.31" | -3.60% | -40 mm | 57.8 mph | calculate → |
| 225/40R20 | 27.09" | +3.15% | -40 mm | 61.9 mph | calculate → |
| 145/60R20 | 26.85" | +2.25% | -120 mm | 61.3 mph | calculate → |
| 275/25R20 | 25.41" | -3.22% | +10 mm | 58.1 mph | calculate → |
| 155/60R20 | 27.32" | +4.05% | -110 mm | 62.4 mph | calculate → |
| 145/65R20 | 27.42" | +4.42% | -120 mm | 62.7 mph | calculate → |
| 315/25R20 | 26.20" | -0.22% | +50 mm | 59.9 mph | calculate → |
| 215/30R20 | 25.08" | -4.50% | -50 mm | 57.3 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" | +0.54% | -30 mm | 60.3 mph | compare → |
| 255/35R19 common | 26.03" | -0.88% | -10 mm | 59.5 mph | compare → |
| 225/40R19 common | 26.09" | -0.66% | -40 mm | 59.6 mph | compare → |
| 265/35R19 common | 26.30" | +0.16% | 0 mm | 60.1 mph | compare → |
| 305/30R19 | 26.20" | -0.21% | +40 mm | 59.9 mph | compare → |
| 315/30R19 | 26.44" | +0.69% | +50 mm | 60.4 mph | compare → |
| 275/25R21 | 26.41" | +0.58% | +10 mm | 60.4 mph | calculate → |
Try another size against 265/30R20
Questions
What size is 265/30R20 in inches?
265/30R20 is about 26.3" tall and 10.4" wide on a 20-inch rim — roughly a 26.5x10.50R20 in inch sizing.
What does 265/30R20 mean?
265 mm section width, sidewall 30% of the width (3.13"), radial construction, 20-inch rim.
What tire sizes are equivalent to 265/30R20?
On the same 20" rim, within 3% of the diameter: 225/35R20 (-0.22%), 315/25R20 (-0.22%), 325/25R20 (+0.52%), 235/35R20 (+0.82%), 255/30R20 (-0.90%), 275/30R20 (+0.90%).
How many revolutions per mile does a 265/30R20 tire make?
About 768 revolutions per mile (circumference 82.5").
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.