Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/30-30 | 305/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.44 (951) | 33.81 (858.8) | -3.63 (-92.2) -9.7% |
| Width inches (mm) | 12.4 (315) | 12.01 (305) | -0.39 (-10) -3.2% |
| Circum. inches (mm) | 117.62 (2987.65) | 106.22 (2698) | -11.4 (-289.65) -9.7% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 8.41 (213.5) | 4.69 (119) 125.9% |
| Revolutions per mile (km) | 538.66 (334.71) | 596.5 (370.64) | 57.83 (35.93) 10.7% |
305/70-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.06 mph (29.07 km/h) |
| 25 mph (40.23 km/h) | 22.58 mph (36.33 km/h) |
| 30 mph (48.28 km/h) | 27.09 mph (43.6 km/h) |
| 35 mph (56.33 km/h) | 31.61 mph (50.87 km/h) |
| 40 mph (64.37 km/h) | 36.12 mph (58.13 km/h) |
| 45 mph (72.42 km/h) | 40.64 mph (65.4 km/h) |
| 50 mph (80.47 km/h) | 45.15 mph (72.67 km/h) |
| 55 mph (88.51 km/h) | 49.67 mph (79.93 km/h) |
| 60 mph (96.56 km/h) | 54.18 mph (87.2 km/h) |
| 65 mph (104.61 km/h) | 58.7 mph (94.47 km/h) |
| 70 mph (112.65 km/h) | 63.21 mph (101.73 km/h) |
| 75 mph (120.7 km/h) | 67.73 mph (109 km/h) |
| 80 mph (128.75 km/h) | 72.24 mph (116.27 km/h) |
| 85 mph (136.79 km/h) | 76.76 mph (123.53 km/h) |
| 90 mph (144.84 km/h) | 81.27 mph (130.8 km/h) |
| 95 mph (152.89 km/h) | 85.79 mph (138.07 km/h) |
| 100 mph (160.93 km/h) | 90.3 mph (145.33 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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