Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/30-30 | 37/13.5-30 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.44 (951) | 37.02 (940.36) | -0.42 (-10.64) -1.1% |
| Width inches (mm) | 12.4 (315) | 13.5 (343) | 1.1 (28) 8.9% |
| Circum. inches (mm) | 117.62 (2987.65) | 116.31 (2954.23) | -1.32 (-33.43) -1.1% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 3.51 (89.18) | -0.21 (-5.32) -5.6% |
| Revolutions per mile (km) | 538.66 (334.71) | 544.76 (338.5) | 6.09 (3.79) 1.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.78 mph (31.83 km/h) |
| 25 mph (40.23 km/h) | 24.72 mph (39.78 km/h) |
| 30 mph (48.28 km/h) | 29.66 mph (47.74 km/h) |
| 35 mph (56.33 km/h) | 34.61 mph (55.7 km/h) |
| 40 mph (64.37 km/h) | 39.55 mph (63.65 km/h) |
| 45 mph (72.42 km/h) | 44.5 mph (71.61 km/h) |
| 50 mph (80.47 km/h) | 49.44 mph (79.57 km/h) |
| 55 mph (88.51 km/h) | 54.38 mph (87.52 km/h) |
| 60 mph (96.56 km/h) | 59.33 mph (95.48 km/h) |
| 65 mph (104.61 km/h) | 64.27 mph (103.44 km/h) |
| 70 mph (112.65 km/h) | 69.22 mph (111.39 km/h) |
| 75 mph (120.7 km/h) | 74.16 mph (119.35 km/h) |
| 80 mph (128.75 km/h) | 79.1 mph (127.31 km/h) |
| 85 mph (136.79 km/h) | 84.05 mph (135.26 km/h) |
| 90 mph (144.84 km/h) | 88.99 mph (143.22 km/h) |
| 95 mph (152.89 km/h) | 93.94 mph (151.18 km/h) |
| 100 mph (160.93 km/h) | 98.88 mph (159.13 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1386 | 1610 | 1734 | 1811 | 1894 | 1953 | 2018 | 2094 | 2200 | 2307 | 2425 | 2519 | 2690 | 2879 | 3026 | 3121 | 3174 | 3368 | 3640 | 4230 |
Better Fuel Economy Factory Ratios Increased Power
