Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/25-20 | 275/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.61 (650.5) | 28.66 (728) | 3.05 (77.5) 11.9% |
| Width inches (mm) | 11.22 (285) | 10.83 (275) | -0.39 (-10) -3.5% |
| Circum. inches (mm) | 80.46 (2043.61) | 90.04 (2287.08) | 9.59 (243.47) 11.9% |
| Sidewall Height inches (mm) | 2.81 (71.25) | 4.33 (110) | 1.53 (38.75) 54.4% |
| Revolutions per mile (km) | 787.5 (489.33) | 703.67 (437.24) | -83.83 (-52.09) -10.6% |
275/40-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.38 mph (36.02 km/h) |
| 25 mph (40.23 km/h) | 27.98 mph (45.03 km/h) |
| 30 mph (48.28 km/h) | 33.57 mph (54.03 km/h) |
| 35 mph (56.33 km/h) | 39.17 mph (63.04 km/h) |
| 40 mph (64.37 km/h) | 44.77 mph (72.04 km/h) |
| 45 mph (72.42 km/h) | 50.36 mph (81.05 km/h) |
| 50 mph (80.47 km/h) | 55.96 mph (90.05 km/h) |
| 55 mph (88.51 km/h) | 61.55 mph (99.06 km/h) |
| 60 mph (96.56 km/h) | 67.15 mph (108.06 km/h) |
| 65 mph (104.61 km/h) | 72.74 mph (117.07 km/h) |
| 70 mph (112.65 km/h) | 78.34 mph (126.08 km/h) |
| 75 mph (120.7 km/h) | 83.94 mph (135.08 km/h) |
| 80 mph (128.75 km/h) | 89.53 mph (144.09 km/h) |
| 85 mph (136.79 km/h) | 95.13 mph (153.09 km/h) |
| 90 mph (144.84 km/h) | 100.72 mph (162.1 km/h) |
| 95 mph (152.89 km/h) | 106.32 mph (171.1 km/h) |
| 100 mph (160.93 km/h) | 111.91 mph (180.11 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
