Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-13 | 145/40-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.5 (546.2) | 16.57 (420.8) | -4.94 (-125.4) -23% |
| Width inches (mm) | 5.31 (135) | 5.71 (145) | 0.39 (10) 7.4% |
| Circum. inches (mm) | 67.56 (1715.94) | 52.05 (1321.98) | -15.51 (-393.96) -23% |
| Sidewall Height inches (mm) | 4.25 (108) | 2.28 (58) | -1.97 (-50) -46.3% |
| Revolutions per mile (km) | 937.88 (582.77) | 1217.37 (756.44) | 279.49 (173.67) 29.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 15.41 mph (24.8 km/h) |
| 25 mph (40.23 km/h) | 19.26 mph (31 km/h) |
| 30 mph (48.28 km/h) | 23.11 mph (37.2 km/h) |
| 35 mph (56.33 km/h) | 26.96 mph (43.4 km/h) |
| 40 mph (64.37 km/h) | 30.82 mph (49.59 km/h) |
| 45 mph (72.42 km/h) | 34.67 mph (55.79 km/h) |
| 50 mph (80.47 km/h) | 38.52 mph (61.99 km/h) |
| 55 mph (88.51 km/h) | 42.37 mph (68.19 km/h) |
| 60 mph (96.56 km/h) | 46.22 mph (74.39 km/h) |
| 65 mph (104.61 km/h) | 50.08 mph (80.59 km/h) |
| 70 mph (112.65 km/h) | 53.93 mph (86.79 km/h) |
| 75 mph (120.7 km/h) | 57.78 mph (92.99 km/h) |
| 80 mph (128.75 km/h) | 61.63 mph (99.19 km/h) |
| 85 mph (136.79 km/h) | 65.49 mph (105.39 km/h) |
| 90 mph (144.84 km/h) | 69.34 mph (111.59 km/h) |
| 95 mph (152.89 km/h) | 73.19 mph (117.79 km/h) |
| 100 mph (160.93 km/h) | 77.04 mph (123.99 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
