Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 100/90-18 | 120/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.09 (637.2) | 24.61 (625.2) | -0.47 (-12) -1.9% |
| Width inches (mm) | 3.94 (100) | 4.72 (120) | 0.79 (20) 20% |
| Circum. inches (mm) | 78.81 (2001.82) | 77.33 (1964.12) | -1.48 (-37.7) -1.9% |
| Sidewall Height inches (mm) | 3.54 (90) | 3.31 (84) | -0.24 (-6) -6.7% |
| Revolutions per mile (km) | 803.94 (499.54) | 819.37 (509.13) | 15.43 (9.59) 1.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.62 mph (31.58 km/h) |
| 25 mph (40.23 km/h) | 24.53 mph (39.48 km/h) |
| 30 mph (48.28 km/h) | 29.44 mph (47.37 km/h) |
| 35 mph (56.33 km/h) | 34.34 mph (55.27 km/h) |
| 40 mph (64.37 km/h) | 39.25 mph (63.16 km/h) |
| 45 mph (72.42 km/h) | 44.15 mph (71.06 km/h) |
| 50 mph (80.47 km/h) | 49.06 mph (78.95 km/h) |
| 55 mph (88.51 km/h) | 53.96 mph (86.85 km/h) |
| 60 mph (96.56 km/h) | 58.87 mph (94.74 km/h) |
| 65 mph (104.61 km/h) | 63.78 mph (102.64 km/h) |
| 70 mph (112.65 km/h) | 68.68 mph (110.53 km/h) |
| 75 mph (120.7 km/h) | 73.59 mph (118.43 km/h) |
| 80 mph (128.75 km/h) | 78.49 mph (126.32 km/h) |
| 85 mph (136.79 km/h) | 83.4 mph (134.22 km/h) |
| 90 mph (144.84 km/h) | 88.31 mph (142.11 km/h) |
| 95 mph (152.89 km/h) | 93.21 mph (150.01 km/h) |
| 100 mph (160.93 km/h) | 98.12 mph (157.9 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2085 | 2422 | 2609 | 2724 | 2848 | 2937 | 3035 | 3150 | 3310 | 3469 | 3647 | 3789 | 4046 | 4330 | 4552 | 4694 | 4774 | 5066 | 5475 | 6362 |
Better Fuel Economy Factory Ratios Increased Power
