Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/30-20 | 255/35-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.55 (649) | 27.03 (686.5) | 1.48 (37.5) 5.8% |
| Width inches (mm) | 9.25 (235) | 10.04 (255) | 0.79 (20) 8.5% |
| Circum. inches (mm) | 80.27 (2038.89) | 84.91 (2156.7) | 4.64 (117.81) 5.8% |
| Sidewall Height inches (mm) | 2.78 (70.5) | 3.51 (89.25) | 0.74 (18.75) 26.6% |
| Revolutions per mile (km) | 789.32 (490.46) | 746.21 (463.67) | -43.12 (-26.79) -5.5% |
255/35-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.16 mph (34.05 km/h) |
| 25 mph (40.23 km/h) | 26.44 mph (42.56 km/h) |
| 30 mph (48.28 km/h) | 31.73 mph (51.07 km/h) |
| 35 mph (56.33 km/h) | 37.02 mph (59.58 km/h) |
| 40 mph (64.37 km/h) | 42.31 mph (68.09 km/h) |
| 45 mph (72.42 km/h) | 47.6 mph (76.61 km/h) |
| 50 mph (80.47 km/h) | 52.89 mph (85.12 km/h) |
| 55 mph (88.51 km/h) | 58.18 mph (93.63 km/h) |
| 60 mph (96.56 km/h) | 63.47 mph (102.14 km/h) |
| 65 mph (104.61 km/h) | 68.76 mph (110.65 km/h) |
| 70 mph (112.65 km/h) | 74.04 mph (119.16 km/h) |
| 75 mph (120.7 km/h) | 79.33 mph (127.68 km/h) |
| 80 mph (128.75 km/h) | 84.62 mph (136.19 km/h) |
| 85 mph (136.79 km/h) | 89.91 mph (144.7 km/h) |
| 90 mph (144.84 km/h) | 95.2 mph (153.21 km/h) |
| 95 mph (152.89 km/h) | 100.49 mph (161.72 km/h) |
| 100 mph (160.93 km/h) | 105.78 mph (170.23 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 |
Better Fuel Economy Factory Ratios Increased Power
