Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/85-18 | 33/9.5-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.03 (661.2) | 32.99 (837.98) | 6.96 (176.78) 26.7% |
| Width inches (mm) | 4.72 (120) | 9.49 (241) | 4.76 (121) 100.8% |
| Circum. inches (mm) | 81.78 (2077.22) | 103.65 (2632.59) | 21.86 (555.37) 26.7% |
| Sidewall Height inches (mm) | 4.02 (102) | 7.5 (190.39) | 3.48 (88.39) 86.7% |
| Revolutions per mile (km) | 774.76 (481.41) | 611.32 (379.85) | -163.44 (-101.56) -21.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.35 mph (40.79 km/h) |
| 25 mph (40.23 km/h) | 31.68 mph (50.99 km/h) |
| 30 mph (48.28 km/h) | 38.02 mph (61.19 km/h) |
| 35 mph (56.33 km/h) | 44.36 mph (71.39 km/h) |
| 40 mph (64.37 km/h) | 50.69 mph (81.59 km/h) |
| 45 mph (72.42 km/h) | 57.03 mph (91.78 km/h) |
| 50 mph (80.47 km/h) | 63.37 mph (101.98 km/h) |
| 55 mph (88.51 km/h) | 69.7 mph (112.18 km/h) |
| 60 mph (96.56 km/h) | 76.04 mph (122.38 km/h) |
| 65 mph (104.61 km/h) | 82.38 mph (132.58 km/h) |
| 70 mph (112.65 km/h) | 88.72 mph (142.77 km/h) |
| 75 mph (120.7 km/h) | 95.05 mph (152.97 km/h) |
| 80 mph (128.75 km/h) | 101.39 mph (163.17 km/h) |
| 85 mph (136.79 km/h) | 107.73 mph (173.37 km/h) |
| 90 mph (144.84 km/h) | 114.06 mph (183.57 km/h) |
| 95 mph (152.89 km/h) | 120.4 mph (193.76 km/h) |
| 100 mph (160.93 km/h) | 126.74 mph (203.96 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1556 | 1807 | 1946 | 2032 | 2125 | 2191 | 2264 | 2350 | 2469 | 2588 | 2721 | 2827 | 3019 | 3231 | 3396 | 3502 | 3562 | 3780 | 4084 | 4746 |
Better Fuel Economy Factory Ratios Increased Power
