Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/65-17 | 305/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.59 (802.3) | 33.81 (858.8) | 2.22 (56.5) 7% |
| Width inches (mm) | 11.22 (285) | 12.01 (305) | 0.79 (20) 7% |
| Circum. inches (mm) | 99.23 (2520.5) | 106.22 (2698) | 6.99 (177.5) 7% |
| Sidewall Height inches (mm) | 7.29 (185.25) | 8.41 (213.5) | 1.11 (28.25) 15.2% |
| Revolutions per mile (km) | 638.5 (396.75) | 596.5 (370.64) | -42.01 (-26.1) -6.6% |
305/70-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.41 mph (34.45 km/h) |
| 25 mph (40.23 km/h) | 26.76 mph (43.07 km/h) |
| 30 mph (48.28 km/h) | 32.11 mph (51.68 km/h) |
| 35 mph (56.33 km/h) | 37.46 mph (60.29 km/h) |
| 40 mph (64.37 km/h) | 42.82 mph (68.91 km/h) |
| 45 mph (72.42 km/h) | 48.17 mph (77.52 km/h) |
| 50 mph (80.47 km/h) | 53.52 mph (86.13 km/h) |
| 55 mph (88.51 km/h) | 58.87 mph (94.75 km/h) |
| 60 mph (96.56 km/h) | 64.23 mph (103.36 km/h) |
| 65 mph (104.61 km/h) | 69.58 mph (111.97 km/h) |
| 70 mph (112.65 km/h) | 74.93 mph (120.59 km/h) |
| 75 mph (120.7 km/h) | 80.28 mph (129.2 km/h) |
| 80 mph (128.75 km/h) | 85.63 mph (137.81 km/h) |
| 85 mph (136.79 km/h) | 90.99 mph (146.43 km/h) |
| 90 mph (144.84 km/h) | 96.34 mph (155.04 km/h) |
| 95 mph (152.89 km/h) | 101.69 mph (163.65 km/h) |
| 100 mph (160.93 km/h) | 107.04 mph (172.27 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1518 | 1763 | 1899 | 1983 | 2073 | 2138 | 2209 | 2293 | 2409 | 2526 | 2655 | 2758 | 2946 | 3152 | 3314 | 3417 | 3475 | 3688 | 3985 | 4631 |
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