Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 27/8.5-15 | 340/70-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.08 (687.72) | 33.74 (857) | 6.66 (169.28) 24.6% |
| Width inches (mm) | 8.5 (216) | 13.39 (340) | 4.88 (124) 57.4% |
| Circum. inches (mm) | 85.06 (2160.54) | 106 (2692.34) | 20.94 (531.81) 24.6% |
| Sidewall Height inches (mm) | 6.04 (153.36) | 9.37 (238) | 3.33 (84.64) 55.2% |
| Revolutions per mile (km) | 744.88 (462.85) | 597.75 (371.42) | -147.13 (-91.42) -19.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.92 mph (40.11 km/h) |
| 25 mph (40.23 km/h) | 31.15 mph (50.14 km/h) |
| 30 mph (48.28 km/h) | 37.38 mph (60.16 km/h) |
| 35 mph (56.33 km/h) | 43.62 mph (70.19 km/h) |
| 40 mph (64.37 km/h) | 49.85 mph (80.22 km/h) |
| 45 mph (72.42 km/h) | 56.08 mph (90.25 km/h) |
| 50 mph (80.47 km/h) | 62.31 mph (100.27 km/h) |
| 55 mph (88.51 km/h) | 68.54 mph (110.3 km/h) |
| 60 mph (96.56 km/h) | 74.77 mph (120.33 km/h) |
| 65 mph (104.61 km/h) | 81 mph (130.36 km/h) |
| 70 mph (112.65 km/h) | 87.23 mph (140.38 km/h) |
| 75 mph (120.7 km/h) | 93.46 mph (150.41 km/h) |
| 80 mph (128.75 km/h) | 99.69 mph (160.44 km/h) |
| 85 mph (136.79 km/h) | 105.92 mph (170.47 km/h) |
| 90 mph (144.84 km/h) | 112.15 mph (180.49 km/h) |
| 95 mph (152.89 km/h) | 118.38 mph (190.52 km/h) |
| 100 mph (160.93 km/h) | 124.61 mph (200.55 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1521 | 1767 | 1903 | 1987 | 2078 | 2143 | 2214 | 2298 | 2414 | 2531 | 2660 | 2764 | 2952 | 3159 | 3321 | 3424 | 3482 | 3696 | 3994 | 4641 |
Better Fuel Economy Factory Ratios Increased Power
