Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/30-30 | 355/75-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.44 (951) | 40.96 (1040.5) | 3.52 (89.5) 9.4% |
| Width inches (mm) | 12.4 (315) | 13.98 (355) | 1.57 (40) 12.7% |
| Circum. inches (mm) | 117.62 (2987.65) | 128.69 (3268.83) | 11.07 (281.17) 9.4% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 10.48 (266.25) | 6.76 (171.75) 181.7% |
| Revolutions per mile (km) | 538.66 (334.71) | 492.33 (305.92) | -46.33 (-28.79) -8.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.88 mph (35.22 km/h) |
| 25 mph (40.23 km/h) | 27.35 mph (44.02 km/h) |
| 30 mph (48.28 km/h) | 32.82 mph (52.82 km/h) |
| 35 mph (56.33 km/h) | 38.29 mph (61.63 km/h) |
| 40 mph (64.37 km/h) | 43.76 mph (70.43 km/h) |
| 45 mph (72.42 km/h) | 49.24 mph (79.24 km/h) |
| 50 mph (80.47 km/h) | 54.71 mph (88.04 km/h) |
| 55 mph (88.51 km/h) | 60.18 mph (96.84 km/h) |
| 60 mph (96.56 km/h) | 65.65 mph (105.65 km/h) |
| 65 mph (104.61 km/h) | 71.12 mph (114.45 km/h) |
| 70 mph (112.65 km/h) | 76.59 mph (123.26 km/h) |
| 75 mph (120.7 km/h) | 82.06 mph (132.06 km/h) |
| 80 mph (128.75 km/h) | 87.53 mph (140.86 km/h) |
| 85 mph (136.79 km/h) | 93 mph (149.67 km/h) |
| 90 mph (144.84 km/h) | 98.47 mph (158.47 km/h) |
| 95 mph (152.89 km/h) | 103.94 mph (167.28 km/h) |
| 100 mph (160.93 km/h) | 109.41 mph (176.08 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1253 | 1455 | 1567 | 1637 | 1711 | 1765 | 1823 | 1893 | 1989 | 2085 | 2191 | 2277 | 2431 | 2602 | 2735 | 2820 | 2868 | 3044 | 3289 | 3823 |
Better Fuel Economy Factory Ratios Increased Power
