Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/40-20 | 275/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.35 (720) | 29.74 (755.5) | 1.4 (35.5) 4.9% |
| Width inches (mm) | 10.43 (265) | 10.83 (275) | 0.39 (10) 3.8% |
| Circum. inches (mm) | 89.05 (2261.95) | 93.44 (2373.47) | 4.39 (111.53) 4.9% |
| Sidewall Height inches (mm) | 4.17 (106) | 4.87 (123.75) | 0.7 (17.75) 16.7% |
| Revolutions per mile (km) | 711.49 (442.1) | 678.05 (421.32) | -33.43 (-20.77) -4.7% |
275/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.99 mph (33.77 km/h) |
| 25 mph (40.23 km/h) | 26.23 mph (42.22 km/h) |
| 30 mph (48.28 km/h) | 31.48 mph (50.66 km/h) |
| 35 mph (56.33 km/h) | 36.73 mph (59.1 km/h) |
| 40 mph (64.37 km/h) | 41.97 mph (67.55 km/h) |
| 45 mph (72.42 km/h) | 47.22 mph (75.99 km/h) |
| 50 mph (80.47 km/h) | 52.47 mph (84.43 km/h) |
| 55 mph (88.51 km/h) | 57.71 mph (92.88 km/h) |
| 60 mph (96.56 km/h) | 62.96 mph (101.32 km/h) |
| 65 mph (104.61 km/h) | 68.2 mph (109.77 km/h) |
| 70 mph (112.65 km/h) | 73.45 mph (118.21 km/h) |
| 75 mph (120.7 km/h) | 78.7 mph (126.65 km/h) |
| 80 mph (128.75 km/h) | 83.94 mph (135.1 km/h) |
| 85 mph (136.79 km/h) | 89.19 mph (143.54 km/h) |
| 90 mph (144.84 km/h) | 94.44 mph (151.98 km/h) |
| 95 mph (152.89 km/h) | 99.68 mph (160.43 km/h) |
| 100 mph (160.93 km/h) | 104.93 mph (168.87 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1726 | 2005 | 2159 | 2254 | 2357 | 2430 | 2511 | 2607 | 2739 | 2871 | 3018 | 3135 | 3348 | 3583 | 3767 | 3884 | 3950 | 4193 | 4530 | 5265 |
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