Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 90/90-21 | 110/80-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.38 (695.4) | 27.93 (709.4) | 0.55 (14) 2% |
| Width inches (mm) | 3.54 (90) | 4.33 (110) | 0.79 (20) 22.2% |
| Circum. inches (mm) | 86.01 (2184.66) | 87.74 (2228.65) | 1.73 (43.98) 2% |
| Sidewall Height inches (mm) | 3.19 (81) | 3.46 (88) | 0.28 (7) 8.6% |
| Revolutions per mile (km) | 736.66 (457.74) | 722.12 (448.7) | -14.54 (-9.03) -2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.4 mph (32.83 km/h) |
| 25 mph (40.23 km/h) | 25.5 mph (41.04 km/h) |
| 30 mph (48.28 km/h) | 30.6 mph (49.25 km/h) |
| 35 mph (56.33 km/h) | 35.7 mph (57.46 km/h) |
| 40 mph (64.37 km/h) | 40.81 mph (65.67 km/h) |
| 45 mph (72.42 km/h) | 45.91 mph (73.88 km/h) |
| 50 mph (80.47 km/h) | 51.01 mph (82.09 km/h) |
| 55 mph (88.51 km/h) | 56.11 mph (90.3 km/h) |
| 60 mph (96.56 km/h) | 61.21 mph (98.5 km/h) |
| 65 mph (104.61 km/h) | 66.31 mph (106.71 km/h) |
| 70 mph (112.65 km/h) | 71.41 mph (114.92 km/h) |
| 75 mph (120.7 km/h) | 76.51 mph (123.13 km/h) |
| 80 mph (128.75 km/h) | 81.61 mph (131.34 km/h) |
| 85 mph (136.79 km/h) | 86.71 mph (139.55 km/h) |
| 90 mph (144.84 km/h) | 91.81 mph (147.76 km/h) |
| 95 mph (152.89 km/h) | 96.91 mph (155.97 km/h) |
| 100 mph (160.93 km/h) | 102.01 mph (164.17 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
