Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/90-15 | 445/80-30 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.57 (624) | 58.03 (1474) | 33.46 (850) 136.2% |
| Width inches (mm) | 5.31 (135) | 17.52 (445) | 12.2 (310) 229.6% |
| Circum. inches (mm) | 77.18 (1960.35) | 182.31 (4630.71) | 105.13 (2670.35) 136.2% |
| Sidewall Height inches (mm) | 4.78 (121.5) | 14.02 (356) | 9.23 (234.5) 193% |
| Revolutions per mile (km) | 820.95 (510.11) | 347.54 (215.95) | -473.41 (-294.16) -57.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 47.24 mph (76.03 km/h) |
| 25 mph (40.23 km/h) | 59.05 mph (95.04 km/h) |
| 30 mph (48.28 km/h) | 70.87 mph (114.05 km/h) |
| 35 mph (56.33 km/h) | 82.68 mph (133.05 km/h) |
| 40 mph (64.37 km/h) | 94.49 mph (152.06 km/h) |
| 45 mph (72.42 km/h) | 106.3 mph (171.07 km/h) |
| 50 mph (80.47 km/h) | 118.11 mph (190.08 km/h) |
| 55 mph (88.51 km/h) | 129.92 mph (209.09 km/h) |
| 60 mph (96.56 km/h) | 141.73 mph (228.09 km/h) |
| 65 mph (104.61 km/h) | 153.54 mph (247.1 km/h) |
| 70 mph (112.65 km/h) | 165.35 mph (266.11 km/h) |
| 75 mph (120.7 km/h) | 177.16 mph (285.12 km/h) |
| 80 mph (128.75 km/h) | 188.97 mph (304.13 km/h) |
| 85 mph (136.79 km/h) | 200.79 mph (323.13 km/h) |
| 90 mph (144.84 km/h) | 212.6 mph (342.14 km/h) |
| 95 mph (152.89 km/h) | 224.41 mph (361.15 km/h) |
| 100 mph (160.93 km/h) | 236.22 mph (380.16 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
