Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 80/100-21 | 110/90-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.3 (693.4) | 26.8 (680.6) | -0.5 (-12.8) -1.8% |
| Width inches (mm) | 3.15 (80) | 4.33 (110) | 1.18 (30) 37.5% |
| Circum. inches (mm) | 85.76 (2178.38) | 84.18 (2138.17) | -1.58 (-40.21) -1.8% |
| Sidewall Height inches (mm) | 3.15 (80) | 3.9 (99) | 0.75 (19) 23.8% |
| Revolutions per mile (km) | 738.78 (459.06) | 752.67 (467.69) | 13.89 (8.63) 1.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.63 mph (31.59 km/h) |
| 25 mph (40.23 km/h) | 24.54 mph (39.49 km/h) |
| 30 mph (48.28 km/h) | 29.45 mph (47.39 km/h) |
| 35 mph (56.33 km/h) | 34.35 mph (55.29 km/h) |
| 40 mph (64.37 km/h) | 39.26 mph (63.19 km/h) |
| 45 mph (72.42 km/h) | 44.17 mph (71.08 km/h) |
| 50 mph (80.47 km/h) | 49.08 mph (78.98 km/h) |
| 55 mph (88.51 km/h) | 53.98 mph (86.88 km/h) |
| 60 mph (96.56 km/h) | 58.89 mph (94.78 km/h) |
| 65 mph (104.61 km/h) | 63.8 mph (102.68 km/h) |
| 70 mph (112.65 km/h) | 68.71 mph (110.57 km/h) |
| 75 mph (120.7 km/h) | 73.62 mph (118.47 km/h) |
| 80 mph (128.75 km/h) | 78.52 mph (126.37 km/h) |
| 85 mph (136.79 km/h) | 83.43 mph (134.27 km/h) |
| 90 mph (144.84 km/h) | 88.34 mph (142.17 km/h) |
| 95 mph (152.89 km/h) | 93.25 mph (150.07 km/h) |
| 100 mph (160.93 km/h) | 98.15 mph (157.96 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1915 | 2225 | 2396 | 2502 | 2616 | 2698 | 2788 | 2893 | 3040 | 3187 | 3350 | 3480 | 3717 | 3978 | 4181 | 4312 | 4385 | 4654 | 5029 | 5844 |
Better Fuel Economy Factory Ratios Increased Power
