Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-12 | 165/55-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.5 (520.8) | 20.15 (511.7) | -0.36 (-9.1) -1.7% |
| Width inches (mm) | 5.31 (135) | 6.5 (165) | 1.18 (30) 22.2% |
| Circum. inches (mm) | 64.42 (1636.14) | 63.29 (1607.55) | -1.13 (-28.59) -1.7% |
| Sidewall Height inches (mm) | 4.25 (108) | 3.57 (90.75) | -0.68 (-17.25) -16% |
| Revolutions per mile (km) | 983.62 (611.19) | 1001.11 (622.06) | 17.49 (10.87) 1.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.65 mph (31.62 km/h) |
| 25 mph (40.23 km/h) | 24.56 mph (39.53 km/h) |
| 30 mph (48.28 km/h) | 29.48 mph (47.44 km/h) |
| 35 mph (56.33 km/h) | 34.39 mph (55.34 km/h) |
| 40 mph (64.37 km/h) | 39.3 mph (63.25 km/h) |
| 45 mph (72.42 km/h) | 44.21 mph (71.16 km/h) |
| 50 mph (80.47 km/h) | 49.13 mph (79.06 km/h) |
| 55 mph (88.51 km/h) | 54.04 mph (86.97 km/h) |
| 60 mph (96.56 km/h) | 58.95 mph (94.87 km/h) |
| 65 mph (104.61 km/h) | 63.86 mph (102.78 km/h) |
| 70 mph (112.65 km/h) | 68.78 mph (110.69 km/h) |
| 75 mph (120.7 km/h) | 73.69 mph (118.59 km/h) |
| 80 mph (128.75 km/h) | 78.6 mph (126.5 km/h) |
| 85 mph (136.79 km/h) | 83.51 mph (134.4 km/h) |
| 90 mph (144.84 km/h) | 88.43 mph (142.31 km/h) |
| 95 mph (152.89 km/h) | 93.34 mph (150.22 km/h) |
| 100 mph (160.93 km/h) | 98.25 mph (158.12 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
