Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/50-21 | 275/55-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.83 (808.4) | 32.91 (835.9) | 1.08 (27.5) 3.4% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 99.99 (2539.66) | 103.39 (2626.06) | 3.4 (86.39) 3.4% |
| Sidewall Height inches (mm) | 5.41 (137.5) | 5.95 (151.25) | 0.54 (13.75) 10% |
| Revolutions per mile (km) | 633.68 (393.75) | 612.84 (380.8) | -20.85 (-12.95) -3.3% |
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 (41.6 km/h) |
| 30 mph (48.28 km/h) | 31.02 mph (49.92 km/h) |
| 35 mph (56.33 km/h) | 36.19 mph (58.24 km/h) |
| 40 mph (64.37 km/h) | 41.36 mph (66.56 km/h) |
| 45 mph (72.42 km/h) | 46.53 mph (74.88 km/h) |
| 50 mph (80.47 km/h) | 51.7 mph (83.2 km/h) |
| 55 mph (88.51 km/h) | 56.87 mph (91.53 km/h) |
| 60 mph (96.56 km/h) | 62.04 mph (99.85 km/h) |
| 65 mph (104.61 km/h) | 67.21 mph (108.17 km/h) |
| 70 mph (112.65 km/h) | 72.38 mph (116.49 km/h) |
| 75 mph (120.7 km/h) | 77.55 mph (124.81 km/h) |
| 80 mph (128.75 km/h) | 82.72 mph (133.13 km/h) |
| 85 mph (136.79 km/h) | 87.89 mph (141.45 km/h) |
| 90 mph (144.84 km/h) | 93.06 mph (149.77 km/h) |
| 95 mph (152.89 km/h) | 98.23 mph (158.09 km/h) |
| 100 mph (160.93 km/h) | 103.4 mph (166.41 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1560 | 1812 | 1951 | 2037 | 2130 | 2197 | 2270 | 2356 | 2475 | 2595 | 2728 | 2834 | 3026 | 3239 | 3404 | 3511 | 3570 | 3789 | 4095 | 4758 |
Better Fuel Economy Factory Ratios Increased Power
