Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 90/90-21 | 110/90-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.38 (695.4) | 28.8 (731.4) | 1.42 (36) 5.2% |
| Width inches (mm) | 3.54 (90) | 4.33 (110) | 0.79 (20) 22.2% |
| Circum. inches (mm) | 86.01 (2184.66) | 90.46 (2297.76) | 4.45 (113.1) 5.2% |
| Sidewall Height inches (mm) | 3.19 (81) | 3.9 (99) | 0.71 (18) 22.2% |
| Revolutions per mile (km) | 736.66 (457.74) | 700.4 (435.21) | -36.26 (-22.53) -4.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.04 mph (33.85 km/h) |
| 25 mph (40.23 km/h) | 26.29 mph (42.32 km/h) |
| 30 mph (48.28 km/h) | 31.55 mph (50.78 km/h) |
| 35 mph (56.33 km/h) | 36.81 mph (59.24 km/h) |
| 40 mph (64.37 km/h) | 42.07 mph (67.71 km/h) |
| 45 mph (72.42 km/h) | 47.33 mph (76.17 km/h) |
| 50 mph (80.47 km/h) | 52.59 mph (84.63 km/h) |
| 55 mph (88.51 km/h) | 57.85 mph (93.1 km/h) |
| 60 mph (96.56 km/h) | 63.11 mph (101.56 km/h) |
| 65 mph (104.61 km/h) | 68.36 mph (110.02 km/h) |
| 70 mph (112.65 km/h) | 73.62 mph (118.49 km/h) |
| 75 mph (120.7 km/h) | 78.88 mph (126.95 km/h) |
| 80 mph (128.75 km/h) | 84.14 mph (135.41 km/h) |
| 85 mph (136.79 km/h) | 89.4 mph (143.88 km/h) |
| 90 mph (144.84 km/h) | 94.66 mph (152.34 km/h) |
| 95 mph (152.89 km/h) | 99.92 mph (160.8 km/h) |
| 100 mph (160.93 km/h) | 105.18 mph (169.27 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1782 | 2071 | 2230 | 2328 | 2435 | 2510 | 2594 | 2693 | 2829 | 2966 | 3117 | 3239 | 3459 | 3701 | 3891 | 4012 | 4081 | 4331 | 4680 | 5438 |
Better Fuel Economy Factory Ratios Increased Power
