Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/40-17 | 275/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.92 (683.8) | 29.74 (755.5) | 2.82 (71.7) 10.5% |
| Width inches (mm) | 12.4 (315) | 10.83 (275) | -1.57 (-40) -12.7% |
| Circum. inches (mm) | 84.58 (2148.22) | 93.44 (2373.47) | 8.87 (225.25) 10.5% |
| Sidewall Height inches (mm) | 4.96 (126) | 4.87 (123.75) | -0.09 (-2.25) -1.8% |
| Revolutions per mile (km) | 749.15 (465.5) | 678.05 (421.32) | -71.1 (-44.18) -9.5% |
275/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.1 mph (35.56 km/h) |
| 25 mph (40.23 km/h) | 27.62 mph (44.45 km/h) |
| 30 mph (48.28 km/h) | 33.15 mph (53.34 km/h) |
| 35 mph (56.33 km/h) | 38.67 mph (62.23 km/h) |
| 40 mph (64.37 km/h) | 44.19 mph (71.12 km/h) |
| 45 mph (72.42 km/h) | 49.72 mph (80.01 km/h) |
| 50 mph (80.47 km/h) | 55.24 mph (88.9 km/h) |
| 55 mph (88.51 km/h) | 60.77 mph (97.8 km/h) |
| 60 mph (96.56 km/h) | 66.29 mph (106.69 km/h) |
| 65 mph (104.61 km/h) | 71.82 mph (115.58 km/h) |
| 70 mph (112.65 km/h) | 77.34 mph (124.47 km/h) |
| 75 mph (120.7 km/h) | 82.86 mph (133.36 km/h) |
| 80 mph (128.75 km/h) | 88.39 mph (142.25 km/h) |
| 85 mph (136.79 km/h) | 93.91 mph (151.14 km/h) |
| 90 mph (144.84 km/h) | 99.44 mph (160.03 km/h) |
| 95 mph (152.89 km/h) | 104.96 mph (168.92 km/h) |
| 100 mph (160.93 km/h) | 110.49 mph (177.81 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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