Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/60-18 | 185/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.32 (643.2) | 26.74 (679.2) | 1.42 (36) 5.6% |
| Width inches (mm) | 6.1 (155) | 7.28 (185) | 1.18 (30) 19.4% |
| Circum. inches (mm) | 79.55 (2020.67) | 84.01 (2133.77) | 4.45 (113.1) 5.6% |
| Sidewall Height inches (mm) | 3.66 (93) | 4.37 (111) | 0.71 (18) 19.4% |
| Revolutions per mile (km) | 796.44 (494.88) | 754.23 (468.65) | -42.21 (-26.23) -5.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.12 mph (33.99 km/h) |
| 25 mph (40.23 km/h) | 26.4 mph (42.49 km/h) |
| 30 mph (48.28 km/h) | 31.68 mph (50.98 km/h) |
| 35 mph (56.33 km/h) | 36.96 mph (59.48 km/h) |
| 40 mph (64.37 km/h) | 42.24 mph (67.98 km/h) |
| 45 mph (72.42 km/h) | 47.52 mph (76.47 km/h) |
| 50 mph (80.47 km/h) | 52.8 mph (84.97 km/h) |
| 55 mph (88.51 km/h) | 58.08 mph (93.47 km/h) |
| 60 mph (96.56 km/h) | 63.36 mph (101.97 km/h) |
| 65 mph (104.61 km/h) | 68.64 mph (110.46 km/h) |
| 70 mph (112.65 km/h) | 73.92 mph (118.96 km/h) |
| 75 mph (120.7 km/h) | 79.2 mph (127.46 km/h) |
| 80 mph (128.75 km/h) | 84.48 mph (135.95 km/h) |
| 85 mph (136.79 km/h) | 89.76 mph (144.45 km/h) |
| 90 mph (144.84 km/h) | 95.04 mph (152.95 km/h) |
| 95 mph (152.89 km/h) | 100.32 mph (161.45 km/h) |
| 100 mph (160.93 km/h) | 105.6 mph (169.94 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1919 | 2230 | 2401 | 2507 | 2622 | 2703 | 2793 | 2899 | 3046 | 3193 | 3357 | 3488 | 3724 | 3986 | 4190 | 4321 | 4394 | 4664 | 5039 | 5856 |
Better Fuel Economy Factory Ratios Increased Power
