Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-12 | 156/60-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.5 (520.8) | 20.37 (517.4) | -0.13 (-3.4) -0.7% |
| Width inches (mm) | 5.31 (135) | 6.14 (156) | 0.83 (21) 15.6% |
| Circum. inches (mm) | 64.42 (1636.14) | 63.99 (1625.46) | -0.42 (-10.68) -0.7% |
| Sidewall Height inches (mm) | 4.25 (108) | 3.69 (93.6) | -0.57 (-14.4) -13.3% |
| Revolutions per mile (km) | 983.62 (611.19) | 990.09 (615.21) | 6.46 (4.02) 0.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.87 mph (31.98 km/h) |
| 25 mph (40.23 km/h) | 24.84 mph (39.97 km/h) |
| 30 mph (48.28 km/h) | 29.8 mph (47.97 km/h) |
| 35 mph (56.33 km/h) | 34.77 mph (55.96 km/h) |
| 40 mph (64.37 km/h) | 39.74 mph (63.95 km/h) |
| 45 mph (72.42 km/h) | 44.71 mph (71.95 km/h) |
| 50 mph (80.47 km/h) | 49.67 mph (79.94 km/h) |
| 55 mph (88.51 km/h) | 54.64 mph (87.94 km/h) |
| 60 mph (96.56 km/h) | 59.61 mph (95.93 km/h) |
| 65 mph (104.61 km/h) | 64.58 mph (103.92 km/h) |
| 70 mph (112.65 km/h) | 69.54 mph (111.92 km/h) |
| 75 mph (120.7 km/h) | 74.51 mph (119.91 km/h) |
| 80 mph (128.75 km/h) | 79.48 mph (127.91 km/h) |
| 85 mph (136.79 km/h) | 84.45 mph (135.9 km/h) |
| 90 mph (144.84 km/h) | 89.41 mph (143.9 km/h) |
| 95 mph (152.89 km/h) | 94.38 mph (151.89 km/h) |
| 100 mph (160.93 km/h) | 99.35 mph (159.88 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
