Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 100/90-21 | 110/90-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.09 (713.4) | 28.8 (731.4) | 0.71 (18) 2.5% |
| Width inches (mm) | 3.94 (100) | 4.33 (110) | 0.39 (10) 10% |
| Circum. inches (mm) | 88.24 (2241.21) | 90.46 (2297.76) | 2.23 (56.55) 2.5% |
| Sidewall Height inches (mm) | 3.54 (90) | 3.9 (99) | 0.35 (9) 10% |
| Revolutions per mile (km) | 718.07 (446.19) | 700.4 (435.21) | -17.67 (-10.98) -2.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.5 mph (33 km/h) |
| 25 mph (40.23 km/h) | 25.63 mph (41.25 km/h) |
| 30 mph (48.28 km/h) | 30.76 mph (49.5 km/h) |
| 35 mph (56.33 km/h) | 35.88 mph (57.75 km/h) |
| 40 mph (64.37 km/h) | 41.01 mph (66 km/h) |
| 45 mph (72.42 km/h) | 46.14 mph (74.25 km/h) |
| 50 mph (80.47 km/h) | 51.26 mph (82.5 km/h) |
| 55 mph (88.51 km/h) | 56.39 mph (90.75 km/h) |
| 60 mph (96.56 km/h) | 61.51 mph (99 km/h) |
| 65 mph (104.61 km/h) | 66.64 mph (107.25 km/h) |
| 70 mph (112.65 km/h) | 71.77 mph (115.5 km/h) |
| 75 mph (120.7 km/h) | 76.89 mph (123.75 km/h) |
| 80 mph (128.75 km/h) | 82.02 mph (132 km/h) |
| 85 mph (136.79 km/h) | 87.14 mph (140.25 km/h) |
| 90 mph (144.84 km/h) | 92.27 mph (148.5 km/h) |
| 95 mph (152.89 km/h) | 97.4 mph (156.75 km/h) |
| 100 mph (160.93 km/h) | 102.52 mph (165 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
