Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/45-21 | 265/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.74 (780.9) | 30.43 (773) | -0.31 (-7.9) -1% |
| Width inches (mm) | 10.83 (275) | 10.43 (265) | -0.39 (-10) -3.6% |
| Circum. inches (mm) | 96.59 (2453.27) | 95.61 (2428.45) | -0.98 (-24.82) -1% |
| Sidewall Height inches (mm) | 4.87 (123.75) | 5.22 (132.5) | 0.34 (8.75) 7.1% |
| Revolutions per mile (km) | 656 (407.62) | 662.7 (411.78) | 6.7 (4.17) 1% |
265/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.8 mph (31.86 km/h) |
| 25 mph (40.23 km/h) | 24.75 mph (39.83 km/h) |
| 30 mph (48.28 km/h) | 29.7 mph (47.79 km/h) |
| 35 mph (56.33 km/h) | 34.65 mph (55.76 km/h) |
| 40 mph (64.37 km/h) | 39.6 mph (63.72 km/h) |
| 45 mph (72.42 km/h) | 44.54 mph (71.69 km/h) |
| 50 mph (80.47 km/h) | 49.49 mph (79.65 km/h) |
| 55 mph (88.51 km/h) | 54.44 mph (87.62 km/h) |
| 60 mph (96.56 km/h) | 59.39 mph (95.58 km/h) |
| 65 mph (104.61 km/h) | 64.34 mph (103.55 km/h) |
| 70 mph (112.65 km/h) | 69.29 mph (111.51 km/h) |
| 75 mph (120.7 km/h) | 74.24 mph (119.48 km/h) |
| 80 mph (128.75 km/h) | 79.19 mph (127.45 km/h) |
| 85 mph (136.79 km/h) | 84.14 mph (135.41 km/h) |
| 90 mph (144.84 km/h) | 89.09 mph (143.38 km/h) |
| 95 mph (152.89 km/h) | 94.04 mph (151.34 km/h) |
| 100 mph (160.93 km/h) | 98.99 mph (159.31 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1686 | 1959 | 2110 | 2203 | 2304 | 2375 | 2454 | 2548 | 2677 | 2806 | 2950 | 3064 | 3272 | 3502 | 3681 | 3796 | 3861 | 4098 | 4428 | 5145 |
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