Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-12 | 185/50-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.5 (520.8) | 21.28 (540.6) | 0.78 (19.8) 3.8% |
| Width inches (mm) | 5.31 (135) | 7.28 (185) | 1.97 (50) 37% |
| Circum. inches (mm) | 64.42 (1636.14) | 66.86 (1698.34) | 2.45 (62.2) 3.8% |
| Sidewall Height inches (mm) | 4.25 (108) | 3.64 (92.5) | -0.61 (-15.5) -14.4% |
| Revolutions per mile (km) | 983.62 (611.19) | 947.6 (588.81) | -36.03 (-22.39) -3.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.76 mph (33.41 km/h) |
| 25 mph (40.23 km/h) | 25.95 mph (41.76 km/h) |
| 30 mph (48.28 km/h) | 31.14 mph (50.12 km/h) |
| 35 mph (56.33 km/h) | 36.33 mph (58.47 km/h) |
| 40 mph (64.37 km/h) | 41.52 mph (66.82 km/h) |
| 45 mph (72.42 km/h) | 46.71 mph (75.17 km/h) |
| 50 mph (80.47 km/h) | 51.9 mph (83.53 km/h) |
| 55 mph (88.51 km/h) | 57.09 mph (91.88 km/h) |
| 60 mph (96.56 km/h) | 62.28 mph (100.23 km/h) |
| 65 mph (104.61 km/h) | 67.47 mph (108.58 km/h) |
| 70 mph (112.65 km/h) | 72.66 mph (116.94 km/h) |
| 75 mph (120.7 km/h) | 77.85 mph (125.29 km/h) |
| 80 mph (128.75 km/h) | 83.04 mph (133.64 km/h) |
| 85 mph (136.79 km/h) | 88.23 mph (142 km/h) |
| 90 mph (144.84 km/h) | 93.42 mph (150.35 km/h) |
| 95 mph (152.89 km/h) | 98.61 mph (158.7 km/h) |
| 100 mph (160.93 km/h) | 103.8 mph (167.05 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
