Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/100-18 | 130/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.45 (697.2) | 26.19 (665.2) | -1.26 (-32) -4.6% |
| Width inches (mm) | 4.72 (120) | 5.12 (130) | 0.39 (10) 8.3% |
| Circum. inches (mm) | 86.23 (2190.32) | 82.28 (2089.79) | -3.96 (-100.53) -4.6% |
| Sidewall Height inches (mm) | 4.72 (120) | 4.09 (104) | -0.63 (-16) -13.3% |
| Revolutions per mile (km) | 734.75 (456.55) | 770.1 (478.52) | 35.35 (21.96) 4.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.08 mph (30.71 km/h) |
| 25 mph (40.23 km/h) | 23.85 mph (38.39 km/h) |
| 30 mph (48.28 km/h) | 28.62 mph (46.06 km/h) |
| 35 mph (56.33 km/h) | 33.39 mph (53.74 km/h) |
| 40 mph (64.37 km/h) | 38.16 mph (61.42 km/h) |
| 45 mph (72.42 km/h) | 42.93 mph (69.1 km/h) |
| 50 mph (80.47 km/h) | 47.71 mph (76.77 km/h) |
| 55 mph (88.51 km/h) | 52.48 mph (84.45 km/h) |
| 60 mph (96.56 km/h) | 57.25 mph (92.13 km/h) |
| 65 mph (104.61 km/h) | 62.02 mph (99.81 km/h) |
| 70 mph (112.65 km/h) | 66.79 mph (107.48 km/h) |
| 75 mph (120.7 km/h) | 71.56 mph (115.16 km/h) |
| 80 mph (128.75 km/h) | 76.33 mph (122.84 km/h) |
| 85 mph (136.79 km/h) | 81.1 mph (130.52 km/h) |
| 90 mph (144.84 km/h) | 85.87 mph (138.19 km/h) |
| 95 mph (152.89 km/h) | 90.64 mph (145.87 km/h) |
| 100 mph (160.93 km/h) | 95.41 mph (153.55 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1960 | 2277 | 2452 | 2560 | 2677 | 2760 | 2852 | 2960 | 3111 | 3261 | 3427 | 3561 | 3803 | 4070 | 4278 | 4412 | 4487 | 4762 | 5145 | 5979 |
Better Fuel Economy Factory Ratios Increased Power
