Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/80-19 | 90/90-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.56 (674.6) | 27.38 (695.4) | 0.82 (20.8) 3.1% |
| Width inches (mm) | 4.72 (120) | 3.54 (90) | -1.18 (-30) -25% |
| Circum. inches (mm) | 83.44 (2119.32) | 86.01 (2184.66) | 2.57 (65.35) 3.1% |
| Sidewall Height inches (mm) | 3.78 (96) | 3.19 (81) | -0.59 (-15) -15.6% |
| Revolutions per mile (km) | 759.37 (471.85) | 736.66 (457.74) | -22.71 (-14.11) -3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.62 mph (33.18 km/h) |
| 25 mph (40.23 km/h) | 25.77 mph (41.47 km/h) |
| 30 mph (48.28 km/h) | 30.92 mph (49.77 km/h) |
| 35 mph (56.33 km/h) | 36.08 mph (58.06 km/h) |
| 40 mph (64.37 km/h) | 41.23 mph (66.36 km/h) |
| 45 mph (72.42 km/h) | 46.39 mph (74.65 km/h) |
| 50 mph (80.47 km/h) | 51.54 mph (82.95 km/h) |
| 55 mph (88.51 km/h) | 56.7 mph (91.24 km/h) |
| 60 mph (96.56 km/h) | 61.85 mph (99.54 km/h) |
| 65 mph (104.61 km/h) | 67 mph (107.83 km/h) |
| 70 mph (112.65 km/h) | 72.16 mph (116.13 km/h) |
| 75 mph (120.7 km/h) | 77.31 mph (124.42 km/h) |
| 80 mph (128.75 km/h) | 82.47 mph (132.72 km/h) |
| 85 mph (136.79 km/h) | 87.62 mph (141.01 km/h) |
| 90 mph (144.84 km/h) | 92.77 mph (149.31 km/h) |
| 95 mph (152.89 km/h) | 97.93 mph (157.6 km/h) |
| 100 mph (160.93 km/h) | 103.08 mph (165.9 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1875 | 2178 | 2345 | 2449 | 2561 | 2640 | 2728 | 2832 | 2976 | 3119 | 3279 | 3406 | 3638 | 3893 | 4092 | 4220 | 4292 | 4555 | 4922 | 5720 |
Better Fuel Economy Factory Ratios Increased Power
