Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/65-15 | 205/40-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.47 (621.5) | 23.46 (595.8) | -1.01 (-25.7) -4.1% |
| Width inches (mm) | 7.28 (185) | 8.07 (205) | 0.79 (20) 10.8% |
| Circum. inches (mm) | 76.87 (1952.5) | 73.69 (1871.76) | -3.18 (-80.74) -4.1% |
| Sidewall Height inches (mm) | 4.73 (120.25) | 3.23 (82) | -1.51 (-38.25) -31.8% |
| Revolutions per mile (km) | 824.25 (512.16) | 859.8 (534.26) | 35.55 (22.09) 4.3% |
205/40-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.17 mph (30.86 km/h) |
| 25 mph (40.23 km/h) | 23.97 mph (38.57 km/h) |
| 30 mph (48.28 km/h) | 28.76 mph (46.28 km/h) |
| 35 mph (56.33 km/h) | 33.55 mph (54 km/h) |
| 40 mph (64.37 km/h) | 38.35 mph (61.71 km/h) |
| 45 mph (72.42 km/h) | 43.14 mph (69.43 km/h) |
| 50 mph (80.47 km/h) | 47.93 mph (77.14 km/h) |
| 55 mph (88.51 km/h) | 52.73 mph (84.85 km/h) |
| 60 mph (96.56 km/h) | 57.52 mph (92.57 km/h) |
| 65 mph (104.61 km/h) | 62.31 mph (100.28 km/h) |
| 70 mph (112.65 km/h) | 67.11 mph (108 km/h) |
| 75 mph (120.7 km/h) | 71.9 mph (115.71 km/h) |
| 80 mph (128.75 km/h) | 76.69 mph (123.42 km/h) |
| 85 mph (136.79 km/h) | 81.49 mph (131.14 km/h) |
| 90 mph (144.84 km/h) | 86.28 mph (138.85 km/h) |
| 95 mph (152.89 km/h) | 91.07 mph (146.57 km/h) |
| 100 mph (160.93 km/h) | 95.86 mph (154.28 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2188 | 2542 | 2737 | 2858 | 2989 | 3082 | 3184 | 3305 | 3473 | 3641 | 3827 | 3976 | 4246 | 4544 | 4776 | 4925 | 5009 | 5316 | 5745 | 6676 |
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