Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/55-21 | 275/60-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.91 (835.9) | 33.99 (863.4) | 1.08 (27.5) 3.3% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 103.39 (2626.06) | 106.79 (2712.45) | 3.4 (86.39) 3.3% |
| Sidewall Height inches (mm) | 5.95 (151.25) | 6.5 (165) | 0.54 (13.75) 9.1% |
| Revolutions per mile (km) | 612.84 (380.8) | 593.32 (368.67) | -19.52 (-12.13) -3.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.66 mph (33.25 km/h) |
| 25 mph (40.23 km/h) | 25.82 mph (41.56 km/h) |
| 30 mph (48.28 km/h) | 30.99 mph (49.87 km/h) |
| 35 mph (56.33 km/h) | 36.15 mph (58.18 km/h) |
| 40 mph (64.37 km/h) | 41.32 mph (66.49 km/h) |
| 45 mph (72.42 km/h) | 46.48 mph (74.8 km/h) |
| 50 mph (80.47 km/h) | 51.64 mph (83.11 km/h) |
| 55 mph (88.51 km/h) | 56.81 mph (91.43 km/h) |
| 60 mph (96.56 km/h) | 61.97 mph (99.74 km/h) |
| 65 mph (104.61 km/h) | 67.14 mph (108.05 km/h) |
| 70 mph (112.65 km/h) | 72.3 mph (116.36 km/h) |
| 75 mph (120.7 km/h) | 77.47 mph (124.67 km/h) |
| 80 mph (128.75 km/h) | 82.63 mph (132.98 km/h) |
| 85 mph (136.79 km/h) | 87.8 mph (141.29 km/h) |
| 90 mph (144.84 km/h) | 92.96 mph (149.61 km/h) |
| 95 mph (152.89 km/h) | 98.13 mph (157.92 km/h) |
| 100 mph (160.93 km/h) | 103.29 mph (166.23 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1510 | 1754 | 1889 | 1972 | 2062 | 2127 | 2197 | 2281 | 2397 | 2512 | 2641 | 2743 | 2930 | 3135 | 3296 | 3399 | 3457 | 3669 | 3964 | 4607 |
Better Fuel Economy Factory Ratios Increased Power
