Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/35-21 | 290/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.58 (725.9) | 29.13 (740) | 0.56 (14.1) 1.9% |
| Width inches (mm) | 10.83 (275) | 11.42 (290) | 0.59 (15) 5.5% |
| Circum. inches (mm) | 89.78 (2280.48) | 91.53 (2324.78) | 1.74 (44.3) 1.9% |
| Sidewall Height inches (mm) | 3.79 (96.25) | 4.57 (116) | 0.78 (19.75) 20.5% |
| Revolutions per mile (km) | 705.7 (438.5) | 692.26 (430.15) | -13.45 (-8.36) -1.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.39 mph (32.81 km/h) |
| 25 mph (40.23 km/h) | 25.49 mph (41.02 km/h) |
| 30 mph (48.28 km/h) | 30.58 mph (49.22 km/h) |
| 35 mph (56.33 km/h) | 35.68 mph (57.42 km/h) |
| 40 mph (64.37 km/h) | 40.78 mph (65.62 km/h) |
| 45 mph (72.42 km/h) | 45.87 mph (73.83 km/h) |
| 50 mph (80.47 km/h) | 50.97 mph (82.03 km/h) |
| 55 mph (88.51 km/h) | 56.07 mph (90.23 km/h) |
| 60 mph (96.56 km/h) | 61.17 mph (98.44 km/h) |
| 65 mph (104.61 km/h) | 66.26 mph (106.64 km/h) |
| 70 mph (112.65 km/h) | 71.36 mph (114.84 km/h) |
| 75 mph (120.7 km/h) | 76.46 mph (123.05 km/h) |
| 80 mph (128.75 km/h) | 81.55 mph (131.25 km/h) |
| 85 mph (136.79 km/h) | 86.65 mph (139.45 km/h) |
| 90 mph (144.84 km/h) | 91.75 mph (147.65 km/h) |
| 95 mph (152.89 km/h) | 96.85 mph (155.86 km/h) |
| 100 mph (160.93 km/h) | 101.94 mph (164.06 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1762 | 2047 | 2204 | 2301 | 2406 | 2481 | 2564 | 2661 | 2796 | 2931 | 3081 | 3201 | 3418 | 3658 | 3846 | 3966 | 4033 | 4280 | 4625 | 5375 |
Better Fuel Economy Factory Ratios Increased Power
