Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 140/70-13 | 185/30-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.72 (526.2) | 18.37 (466.6) | -2.35 (-59.6) -11.3% |
| Width inches (mm) | 5.51 (140) | 7.28 (185) | 1.77 (45) 32.1% |
| Circum. inches (mm) | 65.08 (1653.11) | 57.71 (1465.87) | -7.37 (-187.24) -11.3% |
| Sidewall Height inches (mm) | 3.86 (98) | 2.19 (55.5) | -1.67 (-42.5) -43.4% |
| Revolutions per mile (km) | 973.53 (604.92) | 1097.88 (682.19) | 124.35 (77.27) 12.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.73 mph (28.54 km/h) |
| 25 mph (40.23 km/h) | 22.17 mph (35.68 km/h) |
| 30 mph (48.28 km/h) | 26.6 mph (42.81 km/h) |
| 35 mph (56.33 km/h) | 31.04 mph (49.95 km/h) |
| 40 mph (64.37 km/h) | 35.47 mph (57.08 km/h) |
| 45 mph (72.42 km/h) | 39.9 mph (64.22 km/h) |
| 50 mph (80.47 km/h) | 44.34 mph (71.35 km/h) |
| 55 mph (88.51 km/h) | 48.77 mph (78.49 km/h) |
| 60 mph (96.56 km/h) | 53.2 mph (85.62 km/h) |
| 65 mph (104.61 km/h) | 57.64 mph (92.76 km/h) |
| 70 mph (112.65 km/h) | 62.07 mph (99.89 km/h) |
| 75 mph (120.7 km/h) | 66.51 mph (107.03 km/h) |
| 80 mph (128.75 km/h) | 70.94 mph (114.17 km/h) |
| 85 mph (136.79 km/h) | 75.37 mph (121.3 km/h) |
| 90 mph (144.84 km/h) | 79.81 mph (128.44 km/h) |
| 95 mph (152.89 km/h) | 84.24 mph (135.57 km/h) |
| 100 mph (160.93 km/h) | 88.67 mph (142.71 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
