Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 140/60-18 | 195/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.61 (625.2) | 25.68 (652.2) | 1.06 (27) 4.3% |
| Width inches (mm) | 5.51 (140) | 7.68 (195) | 2.17 (55) 39.3% |
| Circum. inches (mm) | 77.33 (1964.12) | 80.67 (2048.95) | 3.34 (84.82) 4.3% |
| Sidewall Height inches (mm) | 3.31 (84) | 3.84 (97.5) | 0.53 (13.5) 16.1% |
| Revolutions per mile (km) | 819.37 (509.13) | 785.45 (488.05) | -33.92 (-21.08) -4.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.86 mph (33.58 km/h) |
| 25 mph (40.23 km/h) | 26.08 mph (41.97 km/h) |
| 30 mph (48.28 km/h) | 31.3 mph (50.37 km/h) |
| 35 mph (56.33 km/h) | 36.51 mph (58.76 km/h) |
| 40 mph (64.37 km/h) | 41.73 mph (67.15 km/h) |
| 45 mph (72.42 km/h) | 46.94 mph (75.55 km/h) |
| 50 mph (80.47 km/h) | 52.16 mph (83.94 km/h) |
| 55 mph (88.51 km/h) | 57.38 mph (92.34 km/h) |
| 60 mph (96.56 km/h) | 62.59 mph (100.73 km/h) |
| 65 mph (104.61 km/h) | 67.81 mph (109.13 km/h) |
| 70 mph (112.65 km/h) | 73.02 mph (117.52 km/h) |
| 75 mph (120.7 km/h) | 78.24 mph (125.91 km/h) |
| 80 mph (128.75 km/h) | 83.45 mph (134.31 km/h) |
| 85 mph (136.79 km/h) | 88.67 mph (142.7 km/h) |
| 90 mph (144.84 km/h) | 93.89 mph (151.1 km/h) |
| 95 mph (152.89 km/h) | 99.1 mph (159.49 km/h) |
| 100 mph (160.93 km/h) | 104.32 mph (167.88 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1999 | 2322 | 2501 | 2611 | 2730 | 2815 | 2909 | 3019 | 3173 | 3326 | 3496 | 3632 | 3879 | 4151 | 4363 | 4499 | 4576 | 4857 | 5248 | 6099 |
Better Fuel Economy Factory Ratios Increased Power
