Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 80/100-21 | 110/100-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.3 (693.4) | 29.66 (753.4) | 2.36 (60) 8.7% |
| Width inches (mm) | 3.15 (80) | 4.33 (110) | 1.18 (30) 37.5% |
| Circum. inches (mm) | 85.76 (2178.38) | 93.18 (2366.88) | 7.42 (188.5) 8.7% |
| Sidewall Height inches (mm) | 3.15 (80) | 4.33 (110) | 1.18 (30) 37.5% |
| Revolutions per mile (km) | 738.78 (459.06) | 679.94 (422.5) | -58.84 (-36.56) -8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.73 mph (34.97 km/h) |
| 25 mph (40.23 km/h) | 27.16 mph (43.72 km/h) |
| 30 mph (48.28 km/h) | 32.6 mph (52.46 km/h) |
| 35 mph (56.33 km/h) | 38.03 mph (61.2 km/h) |
| 40 mph (64.37 km/h) | 43.46 mph (69.94 km/h) |
| 45 mph (72.42 km/h) | 48.89 mph (78.69 km/h) |
| 50 mph (80.47 km/h) | 54.33 mph (87.43 km/h) |
| 55 mph (88.51 km/h) | 59.76 mph (96.17 km/h) |
| 60 mph (96.56 km/h) | 65.19 mph (104.92 km/h) |
| 65 mph (104.61 km/h) | 70.62 mph (113.66 km/h) |
| 70 mph (112.65 km/h) | 76.06 mph (122.4 km/h) |
| 75 mph (120.7 km/h) | 81.49 mph (131.15 km/h) |
| 80 mph (128.75 km/h) | 86.92 mph (139.89 km/h) |
| 85 mph (136.79 km/h) | 92.36 mph (148.63 km/h) |
| 90 mph (144.84 km/h) | 97.79 mph (157.37 km/h) |
| 95 mph (152.89 km/h) | 103.22 mph (166.12 km/h) |
| 100 mph (160.93 km/h) | 108.65 mph (174.86 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1730 | 2010 | 2165 | 2260 | 2364 | 2437 | 2518 | 2614 | 2746 | 2879 | 3026 | 3144 | 3358 | 3593 | 3777 | 3895 | 3961 | 4204 | 4543 | 5279 |
Better Fuel Economy Factory Ratios Increased Power
