Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/50-21 | 275/50-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.04 (788.4) | 31.83 (808.4) | 0.79 (20) 2.5% |
| Width inches (mm) | 10.04 (255) | 10.83 (275) | 0.79 (20) 7.8% |
| Circum. inches (mm) | 97.51 (2476.83) | 99.99 (2539.66) | 2.47 (62.83) 2.5% |
| Sidewall Height inches (mm) | 5.02 (127.5) | 5.41 (137.5) | 0.39 (10) 7.8% |
| Revolutions per mile (km) | 649.76 (403.74) | 633.68 (393.75) | -16.08 (-9.99) -2.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.51 mph (33 km/h) |
| 25 mph (40.23 km/h) | 25.63 mph (41.25 km/h) |
| 30 mph (48.28 km/h) | 30.76 mph (49.51 km/h) |
| 35 mph (56.33 km/h) | 35.89 mph (57.76 km/h) |
| 40 mph (64.37 km/h) | 41.01 mph (66.01 km/h) |
| 45 mph (72.42 km/h) | 46.14 mph (74.26 km/h) |
| 50 mph (80.47 km/h) | 51.27 mph (82.51 km/h) |
| 55 mph (88.51 km/h) | 56.4 mph (90.76 km/h) |
| 60 mph (96.56 km/h) | 61.52 mph (99.01 km/h) |
| 65 mph (104.61 km/h) | 66.65 mph (107.26 km/h) |
| 70 mph (112.65 km/h) | 71.78 mph (115.51 km/h) |
| 75 mph (120.7 km/h) | 76.9 mph (123.76 km/h) |
| 80 mph (128.75 km/h) | 82.03 mph (132.01 km/h) |
| 85 mph (136.79 km/h) | 87.16 mph (140.26 km/h) |
| 90 mph (144.84 km/h) | 92.28 mph (148.52 km/h) |
| 95 mph (152.89 km/h) | 97.41 mph (156.77 km/h) |
| 100 mph (160.93 km/h) | 102.54 mph (165.02 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1613 | 1873 | 2017 | 2107 | 2203 | 2271 | 2347 | 2436 | 2560 | 2683 | 2820 | 2930 | 3129 | 3349 | 3520 | 3630 | 3692 | 3918 | 4234 | 4920 |
Better Fuel Economy Factory Ratios Increased Power
