Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/70-18 | 155/90-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.54 (674.2) | 28.98 (736.2) | 2.44 (62) 9.2% |
| Width inches (mm) | 6.1 (155) | 6.1 (155) | 0 (0) 0% |
| Circum. inches (mm) | 83.39 (2118.06) | 91.06 (2312.84) | 7.67 (194.78) 9.2% |
| Sidewall Height inches (mm) | 4.27 (108.5) | 5.49 (139.5) | 1.22 (31) 28.6% |
| Revolutions per mile (km) | 759.82 (472.13) | 695.83 (432.37) | -63.99 (-39.76) -8.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.84 mph (35.15 km/h) |
| 25 mph (40.23 km/h) | 27.3 mph (43.93 km/h) |
| 30 mph (48.28 km/h) | 32.76 mph (52.72 km/h) |
| 35 mph (56.33 km/h) | 38.22 mph (61.51 km/h) |
| 40 mph (64.37 km/h) | 43.68 mph (70.29 km/h) |
| 45 mph (72.42 km/h) | 49.14 mph (79.08 km/h) |
| 50 mph (80.47 km/h) | 54.6 mph (87.87 km/h) |
| 55 mph (88.51 km/h) | 60.06 mph (96.65 km/h) |
| 60 mph (96.56 km/h) | 65.52 mph (105.44 km/h) |
| 65 mph (104.61 km/h) | 70.98 mph (114.23 km/h) |
| 70 mph (112.65 km/h) | 76.44 mph (123.01 km/h) |
| 75 mph (120.7 km/h) | 81.9 mph (131.8 km/h) |
| 80 mph (128.75 km/h) | 87.36 mph (140.59 km/h) |
| 85 mph (136.79 km/h) | 92.82 mph (149.37 km/h) |
| 90 mph (144.84 km/h) | 98.28 mph (158.16 km/h) |
| 95 mph (152.89 km/h) | 103.74 mph (166.95 km/h) |
| 100 mph (160.93 km/h) | 109.2 mph (175.73 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
