Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/40-20 | 275/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.72 (704) | 28.66 (728) | 0.94 (24) 3.4% |
| Width inches (mm) | 9.65 (245) | 10.83 (275) | 1.18 (30) 12.2% |
| Circum. inches (mm) | 87.07 (2211.68) | 90.04 (2287.08) | 2.97 (75.4) 3.4% |
| Sidewall Height inches (mm) | 3.86 (98) | 4.33 (110) | 0.47 (12) 12.2% |
| Revolutions per mile (km) | 727.66 (452.14) | 703.67 (437.24) | -23.99 (-14.91) -3.3% |
275/40-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.68 mph (33.28 km/h) |
| 25 mph (40.23 km/h) | 25.85 mph (41.61 km/h) |
| 30 mph (48.28 km/h) | 31.02 mph (49.93 km/h) |
| 35 mph (56.33 km/h) | 36.19 mph (58.25 km/h) |
| 40 mph (64.37 km/h) | 41.36 mph (66.57 km/h) |
| 45 mph (72.42 km/h) | 46.53 mph (74.89 km/h) |
| 50 mph (80.47 km/h) | 51.7 mph (83.21 km/h) |
| 55 mph (88.51 km/h) | 56.88 mph (91.53 km/h) |
| 60 mph (96.56 km/h) | 62.05 mph (99.85 km/h) |
| 65 mph (104.61 km/h) | 67.22 mph (108.17 km/h) |
| 70 mph (112.65 km/h) | 72.39 mph (116.49 km/h) |
| 75 mph (120.7 km/h) | 77.56 mph (124.82 km/h) |
| 80 mph (128.75 km/h) | 82.73 mph (133.14 km/h) |
| 85 mph (136.79 km/h) | 87.9 mph (141.46 km/h) |
| 90 mph (144.84 km/h) | 93.07 mph (149.78 km/h) |
| 95 mph (152.89 km/h) | 98.24 mph (158.1 km/h) |
| 100 mph (160.93 km/h) | 103.41 mph (166.42 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
