Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 140/80-18 | 150/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.82 (681.2) | 26.27 (667.2) | -0.55 (-14) -2.1% |
| Width inches (mm) | 5.51 (140) | 5.91 (150) | 0.39 (10) 7.1% |
| Circum. inches (mm) | 84.25 (2140.05) | 82.52 (2096.07) | -1.73 (-43.98) -2.1% |
| Sidewall Height inches (mm) | 4.41 (112) | 4.13 (105) | -0.28 (-7) -6.2% |
| Revolutions per mile (km) | 752.01 (467.28) | 767.79 (477.08) | 15.78 (9.8) 2.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.59 mph (31.53 km/h) |
| 25 mph (40.23 km/h) | 24.49 mph (39.41 km/h) |
| 30 mph (48.28 km/h) | 29.38 mph (47.29 km/h) |
| 35 mph (56.33 km/h) | 34.28 mph (55.17 km/h) |
| 40 mph (64.37 km/h) | 39.18 mph (63.05 km/h) |
| 45 mph (72.42 km/h) | 44.08 mph (70.93 km/h) |
| 50 mph (80.47 km/h) | 48.97 mph (78.81 km/h) |
| 55 mph (88.51 km/h) | 53.87 mph (86.69 km/h) |
| 60 mph (96.56 km/h) | 58.77 mph (94.58 km/h) |
| 65 mph (104.61 km/h) | 63.66 mph (102.46 km/h) |
| 70 mph (112.65 km/h) | 68.56 mph (110.34 km/h) |
| 75 mph (120.7 km/h) | 73.46 mph (118.22 km/h) |
| 80 mph (128.75 km/h) | 78.36 mph (126.1 km/h) |
| 85 mph (136.79 km/h) | 83.25 mph (133.98 km/h) |
| 90 mph (144.84 km/h) | 88.15 mph (141.86 km/h) |
| 95 mph (152.89 km/h) | 93.05 mph (149.75 km/h) |
| 100 mph (160.93 km/h) | 97.94 mph (157.63 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1954 | 2270 | 2444 | 2553 | 2669 | 2752 | 2844 | 2952 | 3101 | 3251 | 3417 | 3550 | 3791 | 4057 | 4265 | 4398 | 4473 | 4748 | 5130 | 5961 |
Better Fuel Economy Factory Ratios Increased Power
