Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 27/8.5-15 | 340/55-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.08 (687.72) | 29.72 (755) | 2.65 (67.28) 9.8% |
| Width inches (mm) | 8.5 (216) | 13.39 (340) | 4.88 (124) 57.4% |
| Circum. inches (mm) | 85.06 (2160.54) | 93.38 (2371.9) | 8.32 (211.37) 9.8% |
| Sidewall Height inches (mm) | 6.04 (153.36) | 7.36 (187) | 1.32 (33.64) 21.9% |
| Revolutions per mile (km) | 744.88 (462.85) | 678.5 (421.6) | -66.38 (-41.25) -8.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.96 mph (35.34 km/h) |
| 25 mph (40.23 km/h) | 27.45 mph (44.17 km/h) |
| 30 mph (48.28 km/h) | 32.93 mph (53 km/h) |
| 35 mph (56.33 km/h) | 38.42 mph (61.84 km/h) |
| 40 mph (64.37 km/h) | 43.91 mph (70.67 km/h) |
| 45 mph (72.42 km/h) | 49.4 mph (79.51 km/h) |
| 50 mph (80.47 km/h) | 54.89 mph (88.34 km/h) |
| 55 mph (88.51 km/h) | 60.38 mph (97.17 km/h) |
| 60 mph (96.56 km/h) | 65.87 mph (106.01 km/h) |
| 65 mph (104.61 km/h) | 71.36 mph (114.84 km/h) |
| 70 mph (112.65 km/h) | 76.85 mph (123.68 km/h) |
| 75 mph (120.7 km/h) | 82.34 mph (132.51 km/h) |
| 80 mph (128.75 km/h) | 87.83 mph (141.34 km/h) |
| 85 mph (136.79 km/h) | 93.32 mph (150.18 km/h) |
| 90 mph (144.84 km/h) | 98.8 mph (159.01 km/h) |
| 95 mph (152.89 km/h) | 104.29 mph (167.85 km/h) |
| 100 mph (160.93 km/h) | 109.78 mph (176.68 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1727 | 2006 | 2160 | 2256 | 2359 | 2432 | 2513 | 2608 | 2741 | 2873 | 3020 | 3137 | 3350 | 3586 | 3769 | 3887 | 3953 | 4195 | 4533 | 5268 |
Better Fuel Economy Factory Ratios Increased Power
