Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/60-18 | 165/90-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.32 (643.2) | 29.69 (754.2) | 4.37 (111) 17.3% |
| Width inches (mm) | 6.1 (155) | 6.5 (165) | 0.39 (10) 6.5% |
| Circum. inches (mm) | 79.55 (2020.67) | 93.28 (2369.39) | 13.73 (348.72) 17.3% |
| Sidewall Height inches (mm) | 3.66 (93) | 5.85 (148.5) | 2.19 (55.5) 59.7% |
| Revolutions per mile (km) | 796.44 (494.88) | 679.22 (422.05) | -117.22 (-72.83) -14.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.45 mph (37.74 km/h) |
| 25 mph (40.23 km/h) | 29.31 mph (47.18 km/h) |
| 30 mph (48.28 km/h) | 35.18 mph (56.61 km/h) |
| 35 mph (56.33 km/h) | 41.04 mph (66.05 km/h) |
| 40 mph (64.37 km/h) | 46.9 mph (75.48 km/h) |
| 45 mph (72.42 km/h) | 52.77 mph (84.92 km/h) |
| 50 mph (80.47 km/h) | 58.63 mph (94.35 km/h) |
| 55 mph (88.51 km/h) | 64.49 mph (103.79 km/h) |
| 60 mph (96.56 km/h) | 70.35 mph (113.22 km/h) |
| 65 mph (104.61 km/h) | 76.22 mph (122.66 km/h) |
| 70 mph (112.65 km/h) | 82.08 mph (132.1 km/h) |
| 75 mph (120.7 km/h) | 87.94 mph (141.53 km/h) |
| 80 mph (128.75 km/h) | 93.81 mph (150.97 km/h) |
| 85 mph (136.79 km/h) | 99.67 mph (160.4 km/h) |
| 90 mph (144.84 km/h) | 105.53 mph (169.84 km/h) |
| 95 mph (152.89 km/h) | 111.39 mph (179.27 km/h) |
| 100 mph (160.93 km/h) | 117.26 mph (188.71 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1728 | 2008 | 2162 | 2258 | 2361 | 2435 | 2516 | 2611 | 2744 | 2876 | 3023 | 3141 | 3354 | 3589 | 3773 | 3891 | 3957 | 4200 | 4538 | 5274 |
Better Fuel Economy Factory Ratios Increased Power
