Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/50-14 | 30/12.5-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.86 (580.6) | 30.02 (762.52) | 7.16 (181.92) 31.3% |
| Width inches (mm) | 8.86 (225) | 12.52 (318) | 3.66 (93) 41.3% |
| Circum. inches (mm) | 71.81 (1824.01) | 94.31 (2395.53) | 22.5 (571.52) 31.3% |
| Sidewall Height inches (mm) | 4.43 (112.5) | 6.51 (165.36) | 2.08 (52.86) 47% |
| Revolutions per mile (km) | 882.31 (548.24) | 671.81 (417.44) | -210.5 (-130.8) -23.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 26.27 mph (42.27 km/h) |
| 25 mph (40.23 km/h) | 32.83 mph (52.84 km/h) |
| 30 mph (48.28 km/h) | 39.4 mph (63.41 km/h) |
| 35 mph (56.33 km/h) | 45.97 mph (73.98 km/h) |
| 40 mph (64.37 km/h) | 52.53 mph (84.54 km/h) |
| 45 mph (72.42 km/h) | 59.1 mph (95.11 km/h) |
| 50 mph (80.47 km/h) | 65.67 mph (105.68 km/h) |
| 55 mph (88.51 km/h) | 72.23 mph (116.25 km/h) |
| 60 mph (96.56 km/h) | 78.8 mph (126.82 km/h) |
| 65 mph (104.61 km/h) | 85.37 mph (137.38 km/h) |
| 70 mph (112.65 km/h) | 91.93 mph (147.95 km/h) |
| 75 mph (120.7 km/h) | 98.5 mph (158.52 km/h) |
| 80 mph (128.75 km/h) | 105.07 mph (169.09 km/h) |
| 85 mph (136.79 km/h) | 111.63 mph (179.66 km/h) |
| 90 mph (144.84 km/h) | 118.2 mph (190.22 km/h) |
| 95 mph (152.89 km/h) | 124.77 mph (200.79 km/h) |
| 100 mph (160.93 km/h) | 131.33 mph (211.36 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1710 | 1986 | 2139 | 2233 | 2335 | 2408 | 2488 | 2583 | 2714 | 2845 | 2990 | 3106 | 3317 | 3550 | 3732 | 3848 | 3914 | 4154 | 4489 | 5216 |
Better Fuel Economy Factory Ratios Increased Power
