Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/70-13 | 185/40-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.44 (519.2) | 18.83 (478.2) | -1.61 (-41) -7.9% |
| Width inches (mm) | 5.31 (135) | 7.28 (185) | 1.97 (50) 37% |
| Circum. inches (mm) | 64.22 (1631.11) | 59.15 (1502.31) | -5.07 (-128.81) -7.9% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 2.91 (74) | -0.81 (-20.5) -21.7% |
| Revolutions per mile (km) | 986.65 (613.08) | 1071.25 (665.64) | 84.59 (52.56) 8.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.42 mph (29.65 km/h) |
| 25 mph (40.23 km/h) | 23.03 mph (37.06 km/h) |
| 30 mph (48.28 km/h) | 27.63 mph (44.47 km/h) |
| 35 mph (56.33 km/h) | 32.24 mph (51.88 km/h) |
| 40 mph (64.37 km/h) | 36.84 mph (59.29 km/h) |
| 45 mph (72.42 km/h) | 41.45 mph (66.7 km/h) |
| 50 mph (80.47 km/h) | 46.05 mph (74.11 km/h) |
| 55 mph (88.51 km/h) | 50.66 mph (81.52 km/h) |
| 60 mph (96.56 km/h) | 55.26 mph (88.94 km/h) |
| 65 mph (104.61 km/h) | 59.87 mph (96.35 km/h) |
| 70 mph (112.65 km/h) | 64.47 mph (103.76 km/h) |
| 75 mph (120.7 km/h) | 69.08 mph (111.17 km/h) |
| 80 mph (128.75 km/h) | 73.68 mph (118.58 km/h) |
| 85 mph (136.79 km/h) | 78.29 mph (125.99 km/h) |
| 90 mph (144.84 km/h) | 82.89 mph (133.4 km/h) |
| 95 mph (152.89 km/h) | 87.5 mph (140.81 km/h) |
| 100 mph (160.93 km/h) | 92.1 mph (148.23 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
