Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/70-17 | 315/30-30 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.61 (802.8) | 37.44 (951) | 5.83 (148.2) 18.5% |
| Width inches (mm) | 10.43 (265) | 12.4 (315) | 1.97 (50) 18.9% |
| Circum. inches (mm) | 99.29 (2522.07) | 117.62 (2987.65) | 18.33 (465.58) 18.5% |
| Sidewall Height inches (mm) | 7.3 (185.5) | 3.72 (94.5) | -3.58 (-91) -49.1% |
| Revolutions per mile (km) | 638.1 (396.5) | 538.66 (334.71) | -99.44 (-61.79) -15.6% |
315/30-30 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.69 mph (38.13 km/h) |
| 25 mph (40.23 km/h) | 29.62 mph (47.66 km/h) |
| 30 mph (48.28 km/h) | 35.54 mph (57.19 km/h) |
| 35 mph (56.33 km/h) | 41.46 mph (66.73 km/h) |
| 40 mph (64.37 km/h) | 47.38 mph (76.26 km/h) |
| 45 mph (72.42 km/h) | 53.31 mph (85.79 km/h) |
| 50 mph (80.47 km/h) | 59.23 mph (95.32 km/h) |
| 55 mph (88.51 km/h) | 65.15 mph (104.85 km/h) |
| 60 mph (96.56 km/h) | 71.08 mph (114.39 km/h) |
| 65 mph (104.61 km/h) | 77 mph (123.92 km/h) |
| 70 mph (112.65 km/h) | 82.92 mph (133.45 km/h) |
| 75 mph (120.7 km/h) | 88.85 mph (142.98 km/h) |
| 80 mph (128.75 km/h) | 94.77 mph (152.52 km/h) |
| 85 mph (136.79 km/h) | 100.69 mph (162.05 km/h) |
| 90 mph (144.84 km/h) | 106.61 mph (171.58 km/h) |
| 95 mph (152.89 km/h) | 112.54 mph (181.11 km/h) |
| 100 mph (160.93 km/h) | 118.46 mph (190.64 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1371 | 1592 | 1715 | 1791 | 1872 | 1931 | 1995 | 2071 | 2176 | 2281 | 2397 | 2491 | 2660 | 2847 | 2992 | 3086 | 3138 | 3331 | 3599 | 4182 |
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