Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/80-17 | 155/90-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.39 (695.8) | 28.98 (736.2) | 1.59 (40.4) 5.8% |
| Width inches (mm) | 6.5 (165) | 6.1 (155) | -0.39 (-10) -6.1% |
| Circum. inches (mm) | 86.06 (2185.92) | 91.06 (2312.84) | 5 (126.92) 5.8% |
| Sidewall Height inches (mm) | 5.2 (132) | 5.49 (139.5) | 0.3 (7.5) 5.7% |
| Revolutions per mile (km) | 736.23 (457.47) | 695.83 (432.37) | -40.4 (-25.1) -5.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.16 mph (34.06 km/h) |
| 25 mph (40.23 km/h) | 26.45 mph (42.57 km/h) |
| 30 mph (48.28 km/h) | 31.74 mph (51.08 km/h) |
| 35 mph (56.33 km/h) | 37.03 mph (59.6 km/h) |
| 40 mph (64.37 km/h) | 42.32 mph (68.11 km/h) |
| 45 mph (72.42 km/h) | 47.61 mph (76.63 km/h) |
| 50 mph (80.47 km/h) | 52.9 mph (85.14 km/h) |
| 55 mph (88.51 km/h) | 58.19 mph (93.65 km/h) |
| 60 mph (96.56 km/h) | 63.48 mph (102.17 km/h) |
| 65 mph (104.61 km/h) | 68.77 mph (110.68 km/h) |
| 70 mph (112.65 km/h) | 74.06 mph (119.2 km/h) |
| 75 mph (120.7 km/h) | 79.35 mph (127.71 km/h) |
| 80 mph (128.75 km/h) | 84.65 mph (136.22 km/h) |
| 85 mph (136.79 km/h) | 89.94 mph (144.74 km/h) |
| 90 mph (144.84 km/h) | 95.23 mph (153.25 km/h) |
| 95 mph (152.89 km/h) | 100.52 mph (161.77 km/h) |
| 100 mph (160.93 km/h) | 105.81 mph (170.28 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1771 | 2057 | 2215 | 2313 | 2419 | 2494 | 2577 | 2675 | 2811 | 2946 | 3097 | 3217 | 3436 | 3677 | 3866 | 3986 | 4054 | 4303 | 4649 | 5403 |
Better Fuel Economy Factory Ratios Increased Power
