Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/30-30 | 315/20-30 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.44 (951) | 34.96 (888) | -2.48 (-63) -6.6% |
| Width inches (mm) | 12.4 (315) | 12.4 (315) | 0 (0) 0% |
| Circum. inches (mm) | 117.62 (2987.65) | 109.83 (2789.73) | -7.79 (-197.92) -6.6% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 2.48 (63) | -1.24 (-31.5) -33.3% |
| Revolutions per mile (km) | 538.66 (334.71) | 576.88 (358.46) | 38.22 (23.75) 7.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.68 mph (30.05 km/h) |
| 25 mph (40.23 km/h) | 23.34 mph (37.57 km/h) |
| 30 mph (48.28 km/h) | 28.01 mph (45.08 km/h) |
| 35 mph (56.33 km/h) | 32.68 mph (52.6 km/h) |
| 40 mph (64.37 km/h) | 37.35 mph (60.11 km/h) |
| 45 mph (72.42 km/h) | 42.02 mph (67.62 km/h) |
| 50 mph (80.47 km/h) | 46.69 mph (75.14 km/h) |
| 55 mph (88.51 km/h) | 51.36 mph (82.65 km/h) |
| 60 mph (96.56 km/h) | 56.03 mph (90.16 km/h) |
| 65 mph (104.61 km/h) | 60.69 mph (97.68 km/h) |
| 70 mph (112.65 km/h) | 65.36 mph (105.19 km/h) |
| 75 mph (120.7 km/h) | 70.03 mph (112.71 km/h) |
| 80 mph (128.75 km/h) | 74.7 mph (120.22 km/h) |
| 85 mph (136.79 km/h) | 79.37 mph (127.73 km/h) |
| 90 mph (144.84 km/h) | 84.04 mph (135.25 km/h) |
| 95 mph (152.89 km/h) | 88.71 mph (142.76 km/h) |
| 100 mph (160.93 km/h) | 93.38 mph (150.27 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1468 | 1705 | 1837 | 1918 | 2005 | 2068 | 2136 | 2218 | 2330 | 2443 | 2568 | 2667 | 2849 | 3049 | 3205 | 3305 | 3361 | 3567 | 3854 | 4479 |
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