Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/50-21 | 275/60-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.04 (788.4) | 33.99 (863.4) | 2.95 (75) 9.5% |
| Width inches (mm) | 10.04 (255) | 10.83 (275) | 0.79 (20) 7.8% |
| Circum. inches (mm) | 97.51 (2476.83) | 106.79 (2712.45) | 9.28 (235.62) 9.5% |
| Sidewall Height inches (mm) | 5.02 (127.5) | 6.5 (165) | 1.48 (37.5) 29.4% |
| Revolutions per mile (km) | 649.76 (403.74) | 593.32 (368.67) | -56.44 (-35.07) -8.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.9 mph (35.25 km/h) |
| 25 mph (40.23 km/h) | 27.38 mph (44.06 km/h) |
| 30 mph (48.28 km/h) | 32.85 mph (52.87 km/h) |
| 35 mph (56.33 km/h) | 38.33 mph (61.69 km/h) |
| 40 mph (64.37 km/h) | 43.81 mph (70.5 km/h) |
| 45 mph (72.42 km/h) | 49.28 mph (79.31 km/h) |
| 50 mph (80.47 km/h) | 54.76 mph (88.12 km/h) |
| 55 mph (88.51 km/h) | 60.23 mph (96.93 km/h) |
| 60 mph (96.56 km/h) | 65.71 mph (105.75 km/h) |
| 65 mph (104.61 km/h) | 71.18 mph (114.56 km/h) |
| 70 mph (112.65 km/h) | 76.66 mph (123.37 km/h) |
| 75 mph (120.7 km/h) | 82.13 mph (132.18 km/h) |
| 80 mph (128.75 km/h) | 87.61 mph (141 km/h) |
| 85 mph (136.79 km/h) | 93.09 mph (149.81 km/h) |
| 90 mph (144.84 km/h) | 98.56 mph (158.62 km/h) |
| 95 mph (152.89 km/h) | 104.04 mph (167.43 km/h) |
| 100 mph (160.93 km/h) | 109.51 mph (176.24 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
