265/50R20 tire size
265/50R20 is a metric size: 30.4" tall, 10.4" wide, on a 20" rim — about a 30.5x10.50R20. The sidewall is 5.2" and the tire turns 663 times per mile.
265/50R20 specs
| Overall diameter (height) | 30.43" · 773 mm |
|---|---|
| Section width | 10.43" · 265 mm |
| Sidewall height | 5.22" · 133 mm (50% of width) |
| Rim diameter | 20" |
| Circumference | 95.61" · 2.428 m |
| Revolutions per mile | 663 (412 per km) |
| Inch (flotation) equivalent | 30.5x10.50R20 |
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 | |
|---|---|---|---|---|---|
| 275/55R20 common | 31.91" | +4.85% | +10 mm | 62.9 mph | compare → |
| 255/45R20 common | 29.04" | -4.59% | -10 mm | 57.2 mph | compare → |
| 255/50R20 common | 30.04" | -1.29% | -10 mm | 59.2 mph | compare → |
| 245/50R20 common | 29.65" | -2.59% | -20 mm | 58.4 mph | compare → |
| 275/45R20 common | 29.74" | -2.26% | +10 mm | 58.6 mph | compare → |
| 255/55R20 common | 31.04" | +2.01% | -10 mm | 61.2 mph | compare → |
| 235/55R20 common | 30.18" | -0.84% | -30 mm | 59.5 mph | compare → |
| 265/45R20 common | 29.39" | -3.43% | 0 mm | 57.9 mph | compare → |
| 275/50R20 common | 30.83" | +1.29% | +10 mm | 60.8 mph | compare → |
| 295/40R20 | 29.29" | -3.75% | +30 mm | 57.7 mph | compare → |
| 285/50R20 | 31.22" | +2.59% | +20 mm | 61.6 mph | compare → |
| 285/40R20 | 28.98" | -4.79% | +20 mm | 57.1 mph | compare → |
| 245/60R20 | 31.57" | +3.75% | -20 mm | 62.3 mph | compare → |
| 235/50R20 | 29.25" | -3.88% | -30 mm | 57.7 mph | compare → |
| 285/45R20 | 30.10" | -1.10% | +20 mm | 59.3 mph | compare → |
| 295/45R20 | 30.45" | +0.06% | +30 mm | 60.0 mph | compare → |
| 305/40R20 | 29.61" | -2.72% | +40 mm | 58.4 mph | compare → |
| 235/60R20 | 31.10" | +2.20% | -30 mm | 61.3 mph | calculate → |
| 325/35R20 | 28.96" | -4.85% | +60 mm | 57.1 mph | calculate → |
| 305/45R20 | 30.81" | +1.23% | +40 mm | 60.7 mph | calculate → |
| 31x18.00R20 | 31.00" | +1.86% | +192 mm | 61.1 mph | calculate → |
| 265/55R20 | 31.48" | +3.43% | 0 mm | 62.1 mph | calculate → |
| 29x15.00R20 | 29.00" | -4.71% | +116 mm | 57.2 mph | calculate → |
| 29x18.00R20 | 29.00" | -4.71% | +192 mm | 57.2 mph | calculate → |
| 175/70R20 | 29.65" | -2.59% | -90 mm | 58.4 mph | calculate → |
| 295/50R20 | 31.61" | +3.88% | +30 mm | 62.3 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 | |
|---|---|---|---|---|---|
| 295/40R21 | 30.29" | -0.47% | +30 mm | 59.7 mph | compare → |
| 265/45R21 | 30.39" | -0.14% | 0 mm | 59.9 mph | compare → |
| 265/55R19 | 30.48" | +0.14% | 0 mm | 60.1 mph | compare → |
| 235/50R21 | 30.25" | -0.60% | -30 mm | 59.6 mph | calculate → |
| 305/40R21 | 30.61" | +0.57% | +40 mm | 60.3 mph | calculate → |
| 165/90R19 | 30.69" | +0.85% | -100 mm | 60.5 mph | calculate → |
Try another size against 265/50R20
Questions
What size is 265/50R20 in inches?
265/50R20 is about 30.4" tall and 10.4" wide on a 20-inch rim — roughly a 30.5x10.50R20 in inch sizing.
What does 265/50R20 mean?
265 mm section width, sidewall 50% of the width (5.22"), radial construction, 20-inch rim.
What tire sizes are equivalent to 265/50R20?
On the same 20" rim, within 3% of the diameter: 295/45R20 (+0.06%), 235/55R20 (-0.84%), 285/45R20 (-1.10%), 305/45R20 (+1.23%), 275/50R20 (+1.29%), 255/50R20 (-1.29%).
How many revolutions per mile does a 265/50R20 tire make?
About 663 revolutions per mile (circumference 95.6").
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.