Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 100/90-21 | 100/80-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.09 (713.4) | 25.3 (642.6) | -2.79 (-70.8) -9.9% |
| Width inches (mm) | 3.94 (100) | 3.94 (100) | 0 (0) 0% |
| Circum. inches (mm) | 88.24 (2241.21) | 79.48 (2018.79) | -8.76 (-222.42) -9.9% |
| Sidewall Height inches (mm) | 3.54 (90) | 3.15 (80) | -0.39 (-10) -11.1% |
| Revolutions per mile (km) | 718.07 (446.19) | 797.18 (495.35) | 79.11 (49.16) 11% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.02 mph (28.99 km/h) |
| 25 mph (40.23 km/h) | 22.52 mph (36.24 km/h) |
| 30 mph (48.28 km/h) | 27.02 mph (43.49 km/h) |
| 35 mph (56.33 km/h) | 31.53 mph (50.74 km/h) |
| 40 mph (64.37 km/h) | 36.03 mph (57.99 km/h) |
| 45 mph (72.42 km/h) | 40.53 mph (65.23 km/h) |
| 50 mph (80.47 km/h) | 45.04 mph (72.48 km/h) |
| 55 mph (88.51 km/h) | 49.54 mph (79.73 km/h) |
| 60 mph (96.56 km/h) | 54.05 mph (86.98 km/h) |
| 65 mph (104.61 km/h) | 58.55 mph (94.23 km/h) |
| 70 mph (112.65 km/h) | 63.05 mph (101.47 km/h) |
| 75 mph (120.7 km/h) | 67.56 mph (108.72 km/h) |
| 80 mph (128.75 km/h) | 72.06 mph (115.97 km/h) |
| 85 mph (136.79 km/h) | 76.56 mph (123.22 km/h) |
| 90 mph (144.84 km/h) | 81.07 mph (130.47 km/h) |
| 95 mph (152.89 km/h) | 85.57 mph (137.71 km/h) |
| 100 mph (160.93 km/h) | 90.08 mph (144.96 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2029 | 2357 | 2538 | 2650 | 2771 | 2857 | 2952 | 3065 | 3220 | 3375 | 3548 | 3686 | 3937 | 4213 | 4429 | 4567 | 4644 | 4929 | 5326 | 6190 |
Better Fuel Economy Factory Ratios Increased Power
