Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 31/12.5-17 | 305/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.02 (787.96) | 33.81 (858.8) | 2.79 (70.84) 9% |
| Width inches (mm) | 12.52 (318) | 12.01 (305) | -0.51 (-13) -4.1% |
| Circum. inches (mm) | 97.46 (2475.45) | 106.22 (2698) | 8.76 (222.55) 9% |
| Sidewall Height inches (mm) | 7.01 (178.08) | 8.41 (213.5) | 1.39 (35.42) 19.9% |
| Revolutions per mile (km) | 650.12 (403.97) | 596.5 (370.64) | -53.63 (-33.32) -8.2% |
305/70-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.8 mph (35.08 km/h) |
| 25 mph (40.23 km/h) | 27.25 mph (43.85 km/h) |
| 30 mph (48.28 km/h) | 32.7 mph (52.62 km/h) |
| 35 mph (56.33 km/h) | 38.15 mph (61.39 km/h) |
| 40 mph (64.37 km/h) | 43.6 mph (70.16 km/h) |
| 45 mph (72.42 km/h) | 49.05 mph (78.93 km/h) |
| 50 mph (80.47 km/h) | 54.5 mph (87.7 km/h) |
| 55 mph (88.51 km/h) | 59.94 mph (96.47 km/h) |
| 60 mph (96.56 km/h) | 65.39 mph (105.24 km/h) |
| 65 mph (104.61 km/h) | 70.84 mph (114.01 km/h) |
| 70 mph (112.65 km/h) | 76.29 mph (122.78 km/h) |
| 75 mph (120.7 km/h) | 81.74 mph (131.55 km/h) |
| 80 mph (128.75 km/h) | 87.19 mph (140.32 km/h) |
| 85 mph (136.79 km/h) | 92.64 mph (149.09 km/h) |
| 90 mph (144.84 km/h) | 98.09 mph (157.86 km/h) |
| 95 mph (152.89 km/h) | 103.54 mph (166.63 km/h) |
| 100 mph (160.93 km/h) | 108.99 mph (175.4 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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