Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/85-18 | 215/55-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.7 (703.7) | 26.31 (668.3) | -1.39 (-35.4) -5% |
| Width inches (mm) | 5.71 (145) | 8.46 (215) | 2.76 (70) 48.3% |
| Circum. inches (mm) | 87.04 (2210.74) | 82.66 (2099.53) | -4.38 (-111.21) -5% |
| Sidewall Height inches (mm) | 4.85 (123.25) | 4.66 (118.25) | -0.2 (-5) -4.1% |
| Revolutions per mile (km) | 727.97 (452.34) | 766.53 (476.3) | 38.56 (23.96) 5.3% |
215/55-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.99 mph (30.57 km/h) |
| 25 mph (40.23 km/h) | 23.74 mph (38.21 km/h) |
| 30 mph (48.28 km/h) | 28.49 mph (45.85 km/h) |
| 35 mph (56.33 km/h) | 33.24 mph (53.49 km/h) |
| 40 mph (64.37 km/h) | 37.99 mph (61.14 km/h) |
| 45 mph (72.42 km/h) | 42.74 mph (68.78 km/h) |
| 50 mph (80.47 km/h) | 47.48 mph (76.42 km/h) |
| 55 mph (88.51 km/h) | 52.23 mph (84.06 km/h) |
| 60 mph (96.56 km/h) | 56.98 mph (91.7 km/h) |
| 65 mph (104.61 km/h) | 61.73 mph (99.35 km/h) |
| 70 mph (112.65 km/h) | 66.48 mph (106.99 km/h) |
| 75 mph (120.7 km/h) | 71.23 mph (114.63 km/h) |
| 80 mph (128.75 km/h) | 75.98 mph (122.27 km/h) |
| 85 mph (136.79 km/h) | 80.72 mph (129.91 km/h) |
| 90 mph (144.84 km/h) | 85.47 mph (137.55 km/h) |
| 95 mph (152.89 km/h) | 90.22 mph (145.2 km/h) |
| 100 mph (160.93 km/h) | 94.97 mph (152.84 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1951 | 2266 | 2440 | 2548 | 2665 | 2748 | 2839 | 2947 | 3096 | 3246 | 3412 | 3544 | 3785 | 4051 | 4258 | 4391 | 4466 | 4740 | 5122 | 5952 |
Better Fuel Economy Factory Ratios Increased Power
