Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/85-18 | 195/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.03 (661.2) | 27.98 (710.7) | 1.95 (49.5) 7.5% |
| Width inches (mm) | 4.72 (120) | 7.68 (195) | 2.95 (75) 62.5% |
| Circum. inches (mm) | 81.78 (2077.22) | 87.9 (2232.73) | 6.12 (155.51) 7.5% |
| Sidewall Height inches (mm) | 4.02 (102) | 4.99 (126.75) | 0.97 (24.75) 24.3% |
| Revolutions per mile (km) | 774.76 (481.41) | 720.8 (447.88) | -53.96 (-33.53) -7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.5 mph (34.6 km/h) |
| 25 mph (40.23 km/h) | 26.87 mph (43.25 km/h) |
| 30 mph (48.28 km/h) | 32.25 mph (51.89 km/h) |
| 35 mph (56.33 km/h) | 37.62 mph (60.54 km/h) |
| 40 mph (64.37 km/h) | 42.99 mph (69.19 km/h) |
| 45 mph (72.42 km/h) | 48.37 mph (77.84 km/h) |
| 50 mph (80.47 km/h) | 53.74 mph (86.49 km/h) |
| 55 mph (88.51 km/h) | 59.12 mph (95.14 km/h) |
| 60 mph (96.56 km/h) | 64.49 mph (103.79 km/h) |
| 65 mph (104.61 km/h) | 69.87 mph (112.44 km/h) |
| 70 mph (112.65 km/h) | 75.24 mph (121.09 km/h) |
| 75 mph (120.7 km/h) | 80.61 mph (129.74 km/h) |
| 80 mph (128.75 km/h) | 85.99 mph (138.39 km/h) |
| 85 mph (136.79 km/h) | 91.36 mph (147.04 km/h) |
| 90 mph (144.84 km/h) | 96.74 mph (155.68 km/h) |
| 95 mph (152.89 km/h) | 102.11 mph (164.33 km/h) |
| 100 mph (160.93 km/h) | 107.49 mph (172.98 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1834 | 2131 | 2295 | 2396 | 2506 | 2584 | 2669 | 2771 | 2911 | 3052 | 3208 | 3333 | 3559 | 3809 | 4004 | 4129 | 4199 | 4457 | 4816 | 5597 |
Better Fuel Economy Factory Ratios Increased Power
