Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/35-20 | 275/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.85 (707.5) | 28.66 (728) | 0.81 (20.5) 2.9% |
| Width inches (mm) | 11.22 (285) | 10.83 (275) | -0.39 (-10) -3.5% |
| Circum. inches (mm) | 87.51 (2222.68) | 90.04 (2287.08) | 2.54 (64.4) 2.9% |
| Sidewall Height inches (mm) | 3.93 (99.75) | 4.33 (110) | 0.4 (10.25) 10.3% |
| Revolutions per mile (km) | 724.06 (449.91) | 703.67 (437.24) | -20.39 (-12.67) -2.8% |
275/40-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.58 mph (33.12 km/h) |
| 25 mph (40.23 km/h) | 25.72 mph (41.4 km/h) |
| 30 mph (48.28 km/h) | 30.87 mph (49.68 km/h) |
| 35 mph (56.33 km/h) | 36.01 mph (57.96 km/h) |
| 40 mph (64.37 km/h) | 41.16 mph (66.24 km/h) |
| 45 mph (72.42 km/h) | 46.3 mph (74.52 km/h) |
| 50 mph (80.47 km/h) | 51.45 mph (82.8 km/h) |
| 55 mph (88.51 km/h) | 56.59 mph (91.08 km/h) |
| 60 mph (96.56 km/h) | 61.74 mph (99.36 km/h) |
| 65 mph (104.61 km/h) | 66.88 mph (107.64 km/h) |
| 70 mph (112.65 km/h) | 72.03 mph (115.92 km/h) |
| 75 mph (120.7 km/h) | 77.17 mph (124.2 km/h) |
| 80 mph (128.75 km/h) | 82.32 mph (132.48 km/h) |
| 85 mph (136.79 km/h) | 87.46 mph (140.76 km/h) |
| 90 mph (144.84 km/h) | 92.61 mph (149.04 km/h) |
| 95 mph (152.89 km/h) | 97.75 mph (157.32 km/h) |
| 100 mph (160.93 km/h) | 102.9 mph (165.6 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
