Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/40-18 | 255/35-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.03 (661.2) | 27.03 (686.5) | 1 (25.3) 3.8% |
| Width inches (mm) | 10.04 (255) | 10.04 (255) | 0 (0) 0% |
| Circum. inches (mm) | 81.78 (2077.22) | 84.91 (2156.7) | 3.13 (79.48) 3.8% |
| Sidewall Height inches (mm) | 4.02 (102) | 3.51 (89.25) | -0.5 (-12.75) -12.5% |
| Revolutions per mile (km) | 774.76 (481.41) | 746.21 (463.67) | -28.55 (-17.74) -3.7% |
255/35-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.77 mph (33.42 km/h) |
| 25 mph (40.23 km/h) | 25.96 mph (41.77 km/h) |
| 30 mph (48.28 km/h) | 31.15 mph (50.13 km/h) |
| 35 mph (56.33 km/h) | 36.34 mph (58.48 km/h) |
| 40 mph (64.37 km/h) | 41.53 mph (66.84 km/h) |
| 45 mph (72.42 km/h) | 46.72 mph (75.19 km/h) |
| 50 mph (80.47 km/h) | 51.91 mph (83.55 km/h) |
| 55 mph (88.51 km/h) | 57.1 mph (91.9 km/h) |
| 60 mph (96.56 km/h) | 62.3 mph (100.26 km/h) |
| 65 mph (104.61 km/h) | 67.49 mph (108.61 km/h) |
| 70 mph (112.65 km/h) | 72.68 mph (116.96 km/h) |
| 75 mph (120.7 km/h) | 77.87 mph (125.32 km/h) |
| 80 mph (128.75 km/h) | 83.06 mph (133.67 km/h) |
| 85 mph (136.79 km/h) | 88.25 mph (142.03 km/h) |
| 90 mph (144.84 km/h) | 93.44 mph (150.38 km/h) |
| 95 mph (152.89 km/h) | 98.64 mph (158.74 km/h) |
| 100 mph (160.93 km/h) | 103.83 mph (167.09 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1899 | 2206 | 2376 | 2481 | 2594 | 2675 | 2764 | 2869 | 3014 | 3160 | 3321 | 3450 | 3685 | 3943 | 4145 | 4275 | 4347 | 4614 | 4986 | 5794 |
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