Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/85-18 | 195/85-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.03 (661.2) | 31.05 (788.7) | 5.02 (127.5) 19.3% |
| Width inches (mm) | 4.72 (120) | 7.68 (195) | 2.95 (75) 62.5% |
| Circum. inches (mm) | 81.78 (2077.22) | 97.55 (2477.77) | 15.77 (400.55) 19.3% |
| Sidewall Height inches (mm) | 4.02 (102) | 6.53 (165.75) | 2.51 (63.75) 62.5% |
| Revolutions per mile (km) | 774.76 (481.41) | 649.51 (403.59) | -125.25 (-77.82) -16.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.86 mph (38.39 km/h) |
| 25 mph (40.23 km/h) | 29.82 mph (47.99 km/h) |
| 30 mph (48.28 km/h) | 35.78 mph (57.59 km/h) |
| 35 mph (56.33 km/h) | 41.75 mph (67.19 km/h) |
| 40 mph (64.37 km/h) | 47.71 mph (76.79 km/h) |
| 45 mph (72.42 km/h) | 53.68 mph (86.39 km/h) |
| 50 mph (80.47 km/h) | 59.64 mph (95.98 km/h) |
| 55 mph (88.51 km/h) | 65.61 mph (105.58 km/h) |
| 60 mph (96.56 km/h) | 71.57 mph (115.18 km/h) |
| 65 mph (104.61 km/h) | 77.53 mph (124.78 km/h) |
| 70 mph (112.65 km/h) | 83.5 mph (134.38 km/h) |
| 75 mph (120.7 km/h) | 89.46 mph (143.98 km/h) |
| 80 mph (128.75 km/h) | 95.43 mph (153.57 km/h) |
| 85 mph (136.79 km/h) | 101.39 mph (163.17 km/h) |
| 90 mph (144.84 km/h) | 107.35 mph (172.77 km/h) |
| 95 mph (152.89 km/h) | 113.32 mph (182.37 km/h) |
| 100 mph (160.93 km/h) | 119.28 mph (191.97 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1653 | 1920 | 2068 | 2159 | 2258 | 2328 | 2405 | 2497 | 2624 | 2750 | 2891 | 3003 | 3207 | 3432 | 3608 | 3721 | 3784 | 4016 | 4340 | 5043 |
Better Fuel Economy Factory Ratios Increased Power
