Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 110/90-18 | 110/80-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.8 (655.2) | 27.93 (709.4) | 2.13 (54.2) 8.3% |
| Width inches (mm) | 4.33 (110) | 4.33 (110) | 0 (0) 0% |
| Circum. inches (mm) | 81.04 (2058.37) | 87.74 (2228.65) | 6.7 (170.27) 8.3% |
| Sidewall Height inches (mm) | 3.9 (99) | 3.46 (88) | -0.43 (-11) -11.1% |
| Revolutions per mile (km) | 781.85 (485.82) | 722.12 (448.7) | -59.74 (-37.12) -7.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.65 mph (34.85 km/h) |
| 25 mph (40.23 km/h) | 27.07 mph (43.56 km/h) |
| 30 mph (48.28 km/h) | 32.48 mph (52.27 km/h) |
| 35 mph (56.33 km/h) | 37.9 mph (60.99 km/h) |
| 40 mph (64.37 km/h) | 43.31 mph (69.7 km/h) |
| 45 mph (72.42 km/h) | 48.72 mph (78.41 km/h) |
| 50 mph (80.47 km/h) | 54.14 mph (87.12 km/h) |
| 55 mph (88.51 km/h) | 59.55 mph (95.84 km/h) |
| 60 mph (96.56 km/h) | 64.96 mph (104.55 km/h) |
| 65 mph (104.61 km/h) | 70.38 mph (113.26 km/h) |
| 70 mph (112.65 km/h) | 75.79 mph (121.97 km/h) |
| 75 mph (120.7 km/h) | 81.2 mph (130.69 km/h) |
| 80 mph (128.75 km/h) | 86.62 mph (139.4 km/h) |
| 85 mph (136.79 km/h) | 92.03 mph (148.11 km/h) |
| 90 mph (144.84 km/h) | 97.45 mph (156.82 km/h) |
| 95 mph (152.89 km/h) | 102.86 mph (165.54 km/h) |
| 100 mph (160.93 km/h) | 108.27 mph (174.25 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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
