Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 80/90-21 | 90/90-22 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.67 (677.4) | 28.38 (720.8) | 1.71 (43.4) 6.4% |
| Width inches (mm) | 3.15 (80) | 3.54 (90) | 0.39 (10) 12.5% |
| Circum. inches (mm) | 83.78 (2128.11) | 89.15 (2264.46) | 5.37 (136.35) 6.4% |
| Sidewall Height inches (mm) | 2.83 (72) | 3.19 (81) | 0.35 (9) 12.5% |
| Revolutions per mile (km) | 756.23 (469.9) | 710.7 (441.61) | -45.53 (-28.29) -6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.28 mph (34.25 km/h) |
| 25 mph (40.23 km/h) | 26.6 mph (42.81 km/h) |
| 30 mph (48.28 km/h) | 31.92 mph (51.37 km/h) |
| 35 mph (56.33 km/h) | 37.24 mph (59.94 km/h) |
| 40 mph (64.37 km/h) | 42.56 mph (68.5 km/h) |
| 45 mph (72.42 km/h) | 47.88 mph (77.06 km/h) |
| 50 mph (80.47 km/h) | 53.2 mph (85.62 km/h) |
| 55 mph (88.51 km/h) | 58.52 mph (94.19 km/h) |
| 60 mph (96.56 km/h) | 63.84 mph (102.75 km/h) |
| 65 mph (104.61 km/h) | 69.16 mph (111.31 km/h) |
| 70 mph (112.65 km/h) | 74.48 mph (119.87 km/h) |
| 75 mph (120.7 km/h) | 79.81 mph (128.43 km/h) |
| 80 mph (128.75 km/h) | 85.13 mph (137 km/h) |
| 85 mph (136.79 km/h) | 90.45 mph (145.56 km/h) |
| 90 mph (144.84 km/h) | 95.77 mph (154.12 km/h) |
| 95 mph (152.89 km/h) | 101.09 mph (162.68 km/h) |
| 100 mph (160.93 km/h) | 106.41 mph (171.25 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1809 | 2101 | 2263 | 2363 | 2470 | 2547 | 2632 | 2732 | 2871 | 3009 | 3163 | 3286 | 3509 | 3756 | 3948 | 4071 | 4141 | 4394 | 4749 | 5518 |
Better Fuel Economy Factory Ratios Increased Power
