Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/70-17 | 305/65-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.71 (830.8) | 32.61 (828.3) | -0.1 (-2.5) -0.3% |
| Width inches (mm) | 11.22 (285) | 12.01 (305) | 0.79 (20) 7% |
| Circum. inches (mm) | 102.76 (2610.04) | 102.45 (2602.18) | -0.31 (-7.85) -0.3% |
| Sidewall Height inches (mm) | 7.85 (199.5) | 7.81 (198.25) | -0.05 (-1.25) -0.6% |
| Revolutions per mile (km) | 616.6 (383.14) | 618.46 (384.29) | 1.86 (1.16) 0.3% |
305/65-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.94 mph (32.09 km/h) |
| 25 mph (40.23 km/h) | 24.92 mph (40.11 km/h) |
| 30 mph (48.28 km/h) | 29.91 mph (48.14 km/h) |
| 35 mph (56.33 km/h) | 34.89 mph (56.16 km/h) |
| 40 mph (64.37 km/h) | 39.88 mph (64.18 km/h) |
| 45 mph (72.42 km/h) | 44.86 mph (72.2 km/h) |
| 50 mph (80.47 km/h) | 49.85 mph (80.23 km/h) |
| 55 mph (88.51 km/h) | 54.83 mph (88.25 km/h) |
| 60 mph (96.56 km/h) | 59.82 mph (96.27 km/h) |
| 65 mph (104.61 km/h) | 64.8 mph (104.29 km/h) |
| 70 mph (112.65 km/h) | 69.79 mph (112.32 km/h) |
| 75 mph (120.7 km/h) | 74.77 mph (120.34 km/h) |
| 80 mph (128.75 km/h) | 79.76 mph (128.36 km/h) |
| 85 mph (136.79 km/h) | 84.74 mph (136.38 km/h) |
| 90 mph (144.84 km/h) | 89.73 mph (144.41 km/h) |
| 95 mph (152.89 km/h) | 94.71 mph (152.43 km/h) |
| 100 mph (160.93 km/h) | 99.7 mph (160.45 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1574 | 1828 | 1969 | 2056 | 2150 | 2217 | 2290 | 2378 | 2498 | 2619 | 2753 | 2860 | 3054 | 3268 | 3436 | 3543 | 3603 | 3824 | 4132 | 4802 |
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