Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/60-20 | 275/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.85 (682) | 28.66 (728) | 1.81 (46) 6.7% |
| Width inches (mm) | 5.71 (145) | 10.83 (275) | 5.12 (130) 89.7% |
| Circum. inches (mm) | 84.35 (2142.57) | 90.04 (2287.08) | 5.69 (144.51) 6.7% |
| Sidewall Height inches (mm) | 3.43 (87) | 4.33 (110) | 0.91 (23) 26.4% |
| Revolutions per mile (km) | 751.13 (466.73) | 703.67 (437.24) | -47.46 (-29.49) -6.3% |
275/40-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.35 mph (34.36 km/h) |
| 25 mph (40.23 km/h) | 26.69 mph (42.95 km/h) |
| 30 mph (48.28 km/h) | 32.02 mph (51.54 km/h) |
| 35 mph (56.33 km/h) | 37.36 mph (60.13 km/h) |
| 40 mph (64.37 km/h) | 42.7 mph (68.72 km/h) |
| 45 mph (72.42 km/h) | 48.04 mph (77.31 km/h) |
| 50 mph (80.47 km/h) | 53.37 mph (85.89 km/h) |
| 55 mph (88.51 km/h) | 58.71 mph (94.48 km/h) |
| 60 mph (96.56 km/h) | 64.05 mph (103.07 km/h) |
| 65 mph (104.61 km/h) | 69.38 mph (111.66 km/h) |
| 70 mph (112.65 km/h) | 74.72 mph (120.25 km/h) |
| 75 mph (120.7 km/h) | 80.06 mph (128.84 km/h) |
| 80 mph (128.75 km/h) | 85.4 mph (137.43 km/h) |
| 85 mph (136.79 km/h) | 90.73 mph (146.02 km/h) |
| 90 mph (144.84 km/h) | 96.07 mph (154.61 km/h) |
| 95 mph (152.89 km/h) | 101.41 mph (163.2 km/h) |
| 100 mph (160.93 km/h) | 106.74 mph (171.79 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
