Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/82-14 | 30/9-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.94 (659) | 30.05 (763.22) | 4.1 (104.22) 15.8% |
| Width inches (mm) | 7.28 (185) | 9.02 (229) | 1.73 (44) 23.8% |
| Circum. inches (mm) | 81.51 (2070.31) | 94.4 (2397.73) | 12.89 (327.42) 15.8% |
| Sidewall Height inches (mm) | 5.97 (151.7) | 8.02 (203.81) | 2.05 (52.11) 34.4% |
| Revolutions per mile (km) | 777.34 (483.02) | 671.2 (417.06) | -106.15 (-65.96) -13.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.16 mph (37.28 km/h) |
| 25 mph (40.23 km/h) | 28.95 mph (46.6 km/h) |
| 30 mph (48.28 km/h) | 34.74 mph (55.92 km/h) |
| 35 mph (56.33 km/h) | 40.54 mph (65.24 km/h) |
| 40 mph (64.37 km/h) | 46.33 mph (74.55 km/h) |
| 45 mph (72.42 km/h) | 52.12 mph (83.87 km/h) |
| 50 mph (80.47 km/h) | 57.91 mph (93.19 km/h) |
| 55 mph (88.51 km/h) | 63.7 mph (102.51 km/h) |
| 60 mph (96.56 km/h) | 69.49 mph (111.83 km/h) |
| 65 mph (104.61 km/h) | 75.28 mph (121.15 km/h) |
| 70 mph (112.65 km/h) | 81.07 mph (130.47 km/h) |
| 75 mph (120.7 km/h) | 86.86 mph (139.79 km/h) |
| 80 mph (128.75 km/h) | 92.65 mph (149.11 km/h) |
| 85 mph (136.79 km/h) | 98.44 mph (158.43 km/h) |
| 90 mph (144.84 km/h) | 104.23 mph (167.75 km/h) |
| 95 mph (152.89 km/h) | 110.02 mph (177.07 km/h) |
| 100 mph (160.93 km/h) | 115.81 mph (186.39 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1708 | 1984 | 2137 | 2231 | 2333 | 2406 | 2486 | 2580 | 2711 | 2842 | 2987 | 3104 | 3314 | 3547 | 3729 | 3845 | 3910 | 4150 | 4485 | 5211 |
Better Fuel Economy Factory Ratios Increased Power
