Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/80-10 | 185/40-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 19.13 (486) | 18.83 (478.2) | -0.31 (-7.8) -1.6% |
| Width inches (mm) | 5.71 (145) | 7.28 (185) | 1.57 (40) 27.6% |
| Circum. inches (mm) | 60.11 (1526.81) | 59.15 (1502.31) | -0.96 (-24.5) -1.6% |
| Sidewall Height inches (mm) | 4.57 (116) | 2.91 (74) | -1.65 (-42) -36.2% |
| Revolutions per mile (km) | 1054.05 (654.96) | 1071.25 (665.64) | 17.19 (10.68) 1.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.68 mph (31.67 km/h) |
| 25 mph (40.23 km/h) | 24.6 mph (39.59 km/h) |
| 30 mph (48.28 km/h) | 29.52 mph (47.51 km/h) |
| 35 mph (56.33 km/h) | 34.44 mph (55.42 km/h) |
| 40 mph (64.37 km/h) | 39.36 mph (63.34 km/h) |
| 45 mph (72.42 km/h) | 44.28 mph (71.26 km/h) |
| 50 mph (80.47 km/h) | 49.2 mph (79.18 km/h) |
| 55 mph (88.51 km/h) | 54.12 mph (87.09 km/h) |
| 60 mph (96.56 km/h) | 59.04 mph (95.01 km/h) |
| 65 mph (104.61 km/h) | 63.96 mph (102.93 km/h) |
| 70 mph (112.65 km/h) | 68.88 mph (110.85 km/h) |
| 75 mph (120.7 km/h) | 73.8 mph (118.76 km/h) |
| 80 mph (128.75 km/h) | 78.72 mph (126.68 km/h) |
| 85 mph (136.79 km/h) | 83.64 mph (134.6 km/h) |
| 90 mph (144.84 km/h) | 88.56 mph (142.52 km/h) |
| 95 mph (152.89 km/h) | 93.48 mph (150.43 km/h) |
| 100 mph (160.93 km/h) | 98.4 mph (158.35 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
