Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/80-19 | 275/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.02 (762.6) | 28.66 (728) | -1.36 (-34.6) -4.5% |
| Width inches (mm) | 6.89 (175) | 10.83 (275) | 3.94 (100) 57.1% |
| Circum. inches (mm) | 94.32 (2395.78) | 90.04 (2287.08) | -4.28 (-108.7) -4.5% |
| Sidewall Height inches (mm) | 5.51 (140) | 4.33 (110) | -1.18 (-30) -21.4% |
| Revolutions per mile (km) | 671.74 (417.4) | 703.67 (437.24) | 31.93 (19.84) 4.8% |
275/40-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.09 mph (30.73 km/h) |
| 25 mph (40.23 km/h) | 23.87 mph (38.41 km/h) |
| 30 mph (48.28 km/h) | 28.64 mph (46.09 km/h) |
| 35 mph (56.33 km/h) | 33.41 mph (53.77 km/h) |
| 40 mph (64.37 km/h) | 38.19 mph (61.45 km/h) |
| 45 mph (72.42 km/h) | 42.96 mph (69.13 km/h) |
| 50 mph (80.47 km/h) | 47.73 mph (76.82 km/h) |
| 55 mph (88.51 km/h) | 52.5 mph (84.5 km/h) |
| 60 mph (96.56 km/h) | 57.28 mph (92.18 km/h) |
| 65 mph (104.61 km/h) | 62.05 mph (99.86 km/h) |
| 70 mph (112.65 km/h) | 66.82 mph (107.54 km/h) |
| 75 mph (120.7 km/h) | 71.6 mph (115.22 km/h) |
| 80 mph (128.75 km/h) | 76.37 mph (122.91 km/h) |
| 85 mph (136.79 km/h) | 81.14 mph (130.59 km/h) |
| 90 mph (144.84 km/h) | 85.92 mph (138.27 km/h) |
| 95 mph (152.89 km/h) | 90.69 mph (145.95 km/h) |
| 100 mph (160.93 km/h) | 95.46 mph (153.63 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1791 | 2080 | 2240 | 2339 | 2446 | 2522 | 2606 | 2705 | 2842 | 2979 | 3132 | 3254 | 3475 | 3719 | 3909 | 4031 | 4100 | 4351 | 4702 | 5464 |
Better Fuel Economy Factory Ratios Increased Power
