Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/70-21 | 130/90-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.61 (701.4) | 25.21 (640.4) | -2.4 (-61) -8.7% |
| Width inches (mm) | 4.72 (120) | 5.12 (130) | 0.39 (10) 8.3% |
| Circum. inches (mm) | 86.75 (2203.51) | 79.21 (2011.88) | -7.54 (-191.64) -8.7% |
| Sidewall Height inches (mm) | 3.31 (84) | 4.61 (117) | 1.3 (33) 39.3% |
| Revolutions per mile (km) | 730.35 (453.82) | 799.92 (497.05) | 69.57 (43.23) 9.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.26 mph (29.39 km/h) |
| 25 mph (40.23 km/h) | 22.83 mph (36.73 km/h) |
| 30 mph (48.28 km/h) | 27.39 mph (44.08 km/h) |
| 35 mph (56.33 km/h) | 31.96 mph (51.43 km/h) |
| 40 mph (64.37 km/h) | 36.52 mph (58.78 km/h) |
| 45 mph (72.42 km/h) | 41.09 mph (66.12 km/h) |
| 50 mph (80.47 km/h) | 45.65 mph (73.47 km/h) |
| 55 mph (88.51 km/h) | 50.22 mph (80.82 km/h) |
| 60 mph (96.56 km/h) | 54.78 mph (88.16 km/h) |
| 65 mph (104.61 km/h) | 59.35 mph (95.51 km/h) |
| 70 mph (112.65 km/h) | 63.91 mph (102.86 km/h) |
| 75 mph (120.7 km/h) | 68.48 mph (110.2 km/h) |
| 80 mph (128.75 km/h) | 73.04 mph (117.55 km/h) |
| 85 mph (136.79 km/h) | 77.61 mph (124.9 km/h) |
| 90 mph (144.84 km/h) | 82.17 mph (132.24 km/h) |
| 95 mph (152.89 km/h) | 86.74 mph (139.59 km/h) |
| 100 mph (160.93 km/h) | 91.3 mph (146.94 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2036 | 2365 | 2547 | 2659 | 2781 | 2867 | 2963 | 3075 | 3231 | 3387 | 3560 | 3699 | 3950 | 4227 | 4444 | 4582 | 4660 | 4946 | 5345 | 6211 |
Better Fuel Economy Factory Ratios Increased Power
