Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/85-18 | 35/7.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.03 (661.2) | 35.04 (890) | 9.01 (228.8) 34.6% |
| Width inches (mm) | 4.72 (120) | 7.52 (191) | 2.8 (71) 59.2% |
| Circum. inches (mm) | 81.78 (2077.22) | 110.08 (2796.02) | 28.3 (718.8) 34.6% |
| Sidewall Height inches (mm) | 4.02 (102) | 7.52 (191) | 3.5 (89) 87.3% |
| Revolutions per mile (km) | 774.76 (481.41) | 575.58 (357.65) | -199.17 (-123.76) -25.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 26.92 mph (43.32 km/h) |
| 25 mph (40.23 km/h) | 33.65 mph (54.16 km/h) |
| 30 mph (48.28 km/h) | 40.38 mph (64.99 km/h) |
| 35 mph (56.33 km/h) | 47.11 mph (75.82 km/h) |
| 40 mph (64.37 km/h) | 53.84 mph (86.65 km/h) |
| 45 mph (72.42 km/h) | 60.57 mph (97.48 km/h) |
| 50 mph (80.47 km/h) | 67.3 mph (108.31 km/h) |
| 55 mph (88.51 km/h) | 74.03 mph (119.14 km/h) |
| 60 mph (96.56 km/h) | 80.76 mph (129.97 km/h) |
| 65 mph (104.61 km/h) | 87.49 mph (140.81 km/h) |
| 70 mph (112.65 km/h) | 94.22 mph (151.64 km/h) |
| 75 mph (120.7 km/h) | 100.95 mph (162.47 km/h) |
| 80 mph (128.75 km/h) | 107.68 mph (173.3 km/h) |
| 85 mph (136.79 km/h) | 114.41 mph (184.13 km/h) |
| 90 mph (144.84 km/h) | 121.14 mph (194.96 km/h) |
| 95 mph (152.89 km/h) | 127.87 mph (205.79 km/h) |
| 100 mph (160.93 km/h) | 134.6 mph (216.62 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1465 | 1702 | 1832 | 1914 | 2001 | 2063 | 2132 | 2213 | 2325 | 2437 | 2562 | 2661 | 2842 | 3042 | 3198 | 3297 | 3353 | 3559 | 3846 | 4469 |
Better Fuel Economy Factory Ratios Increased Power
