Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/55-15 | 185/45-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.71 (551.5) | 23.56 (598.3) | 1.84 (46.8) 8.5% |
| Width inches (mm) | 6.1 (155) | 7.28 (185) | 1.18 (30) 19.4% |
| Circum. inches (mm) | 68.21 (1732.59) | 74 (1879.61) | 5.79 (147.03) 8.5% |
| Sidewall Height inches (mm) | 3.36 (85.25) | 3.28 (83.25) | -0.08 (-2) -2.3% |
| Revolutions per mile (km) | 928.87 (577.17) | 856.21 (532.02) | -72.66 (-45.15) -7.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.7 mph (34.92 km/h) |
| 25 mph (40.23 km/h) | 27.12 mph (43.65 km/h) |
| 30 mph (48.28 km/h) | 32.55 mph (52.38 km/h) |
| 35 mph (56.33 km/h) | 37.97 mph (61.11 km/h) |
| 40 mph (64.37 km/h) | 43.39 mph (69.84 km/h) |
| 45 mph (72.42 km/h) | 48.82 mph (78.57 km/h) |
| 50 mph (80.47 km/h) | 54.24 mph (87.3 km/h) |
| 55 mph (88.51 km/h) | 59.67 mph (96.03 km/h) |
| 60 mph (96.56 km/h) | 65.09 mph (104.75 km/h) |
| 65 mph (104.61 km/h) | 70.52 mph (113.48 km/h) |
| 70 mph (112.65 km/h) | 75.94 mph (122.21 km/h) |
| 75 mph (120.7 km/h) | 81.36 mph (130.94 km/h) |
| 80 mph (128.75 km/h) | 86.79 mph (139.67 km/h) |
| 85 mph (136.79 km/h) | 92.21 mph (148.4 km/h) |
| 90 mph (144.84 km/h) | 97.64 mph (157.13 km/h) |
| 95 mph (152.89 km/h) | 103.06 mph (165.86 km/h) |
| 100 mph (160.93 km/h) | 108.49 mph (174.59 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2179 | 2531 | 2726 | 2846 | 2976 | 3069 | 3171 | 3292 | 3458 | 3625 | 3811 | 3959 | 4228 | 4525 | 4756 | 4905 | 4988 | 5294 | 5721 | 6648 |
Better Fuel Economy Factory Ratios Increased Power
