Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 140/60-18 | 170/70-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.61 (625.2) | 21.37 (542.8) | -3.24 (-82.4) -13.2% |
| Width inches (mm) | 5.51 (140) | 6.69 (170) | 1.18 (30) 21.4% |
| Circum. inches (mm) | 77.33 (1964.12) | 67.14 (1705.26) | -10.19 (-258.87) -13.2% |
| Sidewall Height inches (mm) | 3.31 (84) | 4.69 (119) | 1.38 (35) 41.7% |
| Revolutions per mile (km) | 819.37 (509.13) | 943.75 (586.42) | 124.38 (77.29) 15.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.36 mph (27.94 km/h) |
| 25 mph (40.23 km/h) | 21.71 mph (34.93 km/h) |
| 30 mph (48.28 km/h) | 26.05 mph (41.92 km/h) |
| 35 mph (56.33 km/h) | 30.39 mph (48.9 km/h) |
| 40 mph (64.37 km/h) | 34.73 mph (55.89 km/h) |
| 45 mph (72.42 km/h) | 39.07 mph (62.88 km/h) |
| 50 mph (80.47 km/h) | 43.41 mph (69.86 km/h) |
| 55 mph (88.51 km/h) | 47.75 mph (76.85 km/h) |
| 60 mph (96.56 km/h) | 52.09 mph (83.83 km/h) |
| 65 mph (104.61 km/h) | 56.43 mph (90.82 km/h) |
| 70 mph (112.65 km/h) | 60.77 mph (97.81 km/h) |
| 75 mph (120.7 km/h) | 65.12 mph (104.79 km/h) |
| 80 mph (128.75 km/h) | 69.46 mph (111.78 km/h) |
| 85 mph (136.79 km/h) | 73.8 mph (118.77 km/h) |
| 90 mph (144.84 km/h) | 78.14 mph (125.75 km/h) |
| 95 mph (152.89 km/h) | 82.48 mph (132.74 km/h) |
| 100 mph (160.93 km/h) | 86.82 mph (139.72 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
