Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 215/55-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 26.31 (668.3) | -4.09 (-103.9) -13.5% |
| Width inches (mm) | 6.89 (175) | 8.46 (215) | 1.57 (40) 22.9% |
| Circum. inches (mm) | 95.51 (2425.94) | 82.66 (2099.53) | -12.85 (-326.41) -13.5% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 4.66 (118.25) | -1.55 (-39.25) -24.9% |
| Revolutions per mile (km) | 663.39 (412.21) | 766.53 (476.3) | 103.14 (64.09) 15.5% |
215/55-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.31 mph (27.86 km/h) |
| 25 mph (40.23 km/h) | 21.64 mph (34.82 km/h) |
| 30 mph (48.28 km/h) | 25.96 mph (41.78 km/h) |
| 35 mph (56.33 km/h) | 30.29 mph (48.75 km/h) |
| 40 mph (64.37 km/h) | 34.62 mph (55.71 km/h) |
| 45 mph (72.42 km/h) | 38.95 mph (62.68 km/h) |
| 50 mph (80.47 km/h) | 43.27 mph (69.64 km/h) |
| 55 mph (88.51 km/h) | 47.6 mph (76.6 km/h) |
| 60 mph (96.56 km/h) | 51.93 mph (83.57 km/h) |
| 65 mph (104.61 km/h) | 56.25 mph (90.53 km/h) |
| 70 mph (112.65 km/h) | 60.58 mph (97.5 km/h) |
| 75 mph (120.7 km/h) | 64.91 mph (104.46 km/h) |
| 80 mph (128.75 km/h) | 69.24 mph (111.42 km/h) |
| 85 mph (136.79 km/h) | 73.56 mph (118.39 km/h) |
| 90 mph (144.84 km/h) | 77.89 mph (125.35 km/h) |
| 95 mph (152.89 km/h) | 82.22 mph (132.32 km/h) |
| 100 mph (160.93 km/h) | 86.54 mph (139.28 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1951 | 2266 | 2440 | 2548 | 2665 | 2748 | 2839 | 2947 | 3096 | 3246 | 3412 | 3544 | 3785 | 4051 | 4258 | 4391 | 4466 | 4740 | 5122 | 5952 |
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