Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/90-18 | 175/90-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.98 (736.2) | 30.4 (772.2) | 1.42 (36) 4.9% |
| Width inches (mm) | 6.1 (155) | 6.89 (175) | 0.79 (20) 12.9% |
| Circum. inches (mm) | 91.06 (2312.84) | 95.51 (2425.94) | 4.45 (113.1) 4.9% |
| Sidewall Height inches (mm) | 5.49 (139.5) | 6.2 (157.5) | 0.71 (18) 12.9% |
| Revolutions per mile (km) | 695.83 (432.37) | 663.39 (412.21) | -32.44 (-20.16) -4.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.98 mph (33.76 km/h) |
| 25 mph (40.23 km/h) | 26.22 mph (42.2 km/h) |
| 30 mph (48.28 km/h) | 31.47 mph (50.64 km/h) |
| 35 mph (56.33 km/h) | 36.71 mph (59.08 km/h) |
| 40 mph (64.37 km/h) | 41.96 mph (67.52 km/h) |
| 45 mph (72.42 km/h) | 47.2 mph (75.96 km/h) |
| 50 mph (80.47 km/h) | 52.44 mph (84.4 km/h) |
| 55 mph (88.51 km/h) | 57.69 mph (92.84 km/h) |
| 60 mph (96.56 km/h) | 62.93 mph (101.28 km/h) |
| 65 mph (104.61 km/h) | 68.18 mph (109.72 km/h) |
| 70 mph (112.65 km/h) | 73.42 mph (118.16 km/h) |
| 75 mph (120.7 km/h) | 78.67 mph (126.6 km/h) |
| 80 mph (128.75 km/h) | 83.91 mph (135.04 km/h) |
| 85 mph (136.79 km/h) | 89.16 mph (143.48 km/h) |
| 90 mph (144.84 km/h) | 94.4 mph (151.92 km/h) |
| 95 mph (152.89 km/h) | 99.65 mph (160.36 km/h) |
| 100 mph (160.93 km/h) | 104.89 mph (168.8 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1688 | 1961 | 2112 | 2205 | 2306 | 2378 | 2457 | 2550 | 2680 | 2809 | 2953 | 3067 | 3276 | 3506 | 3685 | 3800 | 3865 | 4102 | 4432 | 5151 |
Better Fuel Economy Factory Ratios Increased Power
