Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/35-21 | 275/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.68 (753.9) | 31.91 (810.5) | 2.23 (56.6) 7.5% |
| Width inches (mm) | 12.4 (315) | 10.83 (275) | -1.57 (-40) -12.7% |
| Circum. inches (mm) | 93.25 (2368.45) | 100.25 (2546.26) | 7 (177.81) 7.5% |
| Sidewall Height inches (mm) | 4.34 (110.25) | 5.95 (151.25) | 1.61 (41) 37.2% |
| Revolutions per mile (km) | 679.49 (422.22) | 632.04 (392.73) | -47.45 (-29.48) -7% |
275/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.5 mph (34.6 km/h) |
| 25 mph (40.23 km/h) | 26.88 mph (43.25 km/h) |
| 30 mph (48.28 km/h) | 32.25 mph (51.91 km/h) |
| 35 mph (56.33 km/h) | 37.63 mph (60.56 km/h) |
| 40 mph (64.37 km/h) | 43 mph (69.21 km/h) |
| 45 mph (72.42 km/h) | 48.38 mph (77.86 km/h) |
| 50 mph (80.47 km/h) | 53.75 mph (86.51 km/h) |
| 55 mph (88.51 km/h) | 59.13 mph (95.16 km/h) |
| 60 mph (96.56 km/h) | 64.5 mph (103.81 km/h) |
| 65 mph (104.61 km/h) | 69.88 mph (112.46 km/h) |
| 70 mph (112.65 km/h) | 75.26 mph (121.11 km/h) |
| 75 mph (120.7 km/h) | 80.63 mph (129.76 km/h) |
| 80 mph (128.75 km/h) | 86.01 mph (138.41 km/h) |
| 85 mph (136.79 km/h) | 91.38 mph (147.06 km/h) |
| 90 mph (144.84 km/h) | 96.76 mph (155.72 km/h) |
| 95 mph (152.89 km/h) | 102.13 mph (164.37 km/h) |
| 100 mph (160.93 km/h) | 107.51 mph (173.02 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1608 | 1869 | 2012 | 2101 | 2197 | 2265 | 2341 | 2430 | 2553 | 2676 | 2813 | 2923 | 3121 | 3340 | 3511 | 3621 | 3682 | 3908 | 4223 | 4907 |
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