Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 80/90-21 | 110/80-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.67 (677.4) | 27.93 (709.4) | 1.26 (32) 4.7% |
| Width inches (mm) | 3.15 (80) | 4.33 (110) | 1.18 (30) 37.5% |
| Circum. inches (mm) | 83.78 (2128.11) | 87.74 (2228.65) | 3.96 (100.53) 4.7% |
| Sidewall Height inches (mm) | 2.83 (72) | 3.46 (88) | 0.63 (16) 22.2% |
| Revolutions per mile (km) | 756.23 (469.9) | 722.12 (448.7) | -34.11 (-21.2) -4.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.94 mph (33.71 km/h) |
| 25 mph (40.23 km/h) | 26.18 mph (42.13 km/h) |
| 30 mph (48.28 km/h) | 31.42 mph (50.56 km/h) |
| 35 mph (56.33 km/h) | 36.65 mph (58.99 km/h) |
| 40 mph (64.37 km/h) | 41.89 mph (67.41 km/h) |
| 45 mph (72.42 km/h) | 47.13 mph (75.84 km/h) |
| 50 mph (80.47 km/h) | 52.36 mph (84.27 km/h) |
| 55 mph (88.51 km/h) | 57.6 mph (92.7 km/h) |
| 60 mph (96.56 km/h) | 62.83 mph (101.12 km/h) |
| 65 mph (104.61 km/h) | 68.07 mph (109.55 km/h) |
| 70 mph (112.65 km/h) | 73.31 mph (117.98 km/h) |
| 75 mph (120.7 km/h) | 78.54 mph (126.4 km/h) |
| 80 mph (128.75 km/h) | 83.78 mph (134.83 km/h) |
| 85 mph (136.79 km/h) | 89.02 mph (143.26 km/h) |
| 90 mph (144.84 km/h) | 94.25 mph (151.68 km/h) |
| 95 mph (152.89 km/h) | 99.49 mph (160.11 km/h) |
| 100 mph (160.93 km/h) | 104.72 mph (168.54 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1838 | 2135 | 2299 | 2401 | 2510 | 2588 | 2674 | 2776 | 2917 | 3058 | 3214 | 3339 | 3566 | 3816 | 4012 | 4137 | 4207 | 4465 | 4825 | 5607 |
Better Fuel Economy Factory Ratios Increased Power
