Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 130/60-21 | 130/80-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.14 (689.4) | 29.19 (741.4) | 2.05 (52) 7.5% |
| Width inches (mm) | 5.12 (130) | 5.12 (130) | 0 (0) 0% |
| Circum. inches (mm) | 85.27 (2165.81) | 91.7 (2329.18) | 6.43 (163.36) 7.5% |
| Sidewall Height inches (mm) | 3.07 (78) | 4.09 (104) | 1.02 (26) 33.3% |
| Revolutions per mile (km) | 743.07 (461.72) | 690.95 (429.34) | -52.12 (-32.38) -7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.51 mph (34.61 km/h) |
| 25 mph (40.23 km/h) | 26.89 mph (43.27 km/h) |
| 30 mph (48.28 km/h) | 32.26 mph (51.92 km/h) |
| 35 mph (56.33 km/h) | 37.64 mph (60.58 km/h) |
| 40 mph (64.37 km/h) | 43.02 mph (69.23 km/h) |
| 45 mph (72.42 km/h) | 48.39 mph (77.88 km/h) |
| 50 mph (80.47 km/h) | 53.77 mph (86.54 km/h) |
| 55 mph (88.51 km/h) | 59.15 mph (95.19 km/h) |
| 60 mph (96.56 km/h) | 64.53 mph (103.84 km/h) |
| 65 mph (104.61 km/h) | 69.9 mph (112.5 km/h) |
| 70 mph (112.65 km/h) | 75.28 mph (121.15 km/h) |
| 75 mph (120.7 km/h) | 80.66 mph (129.81 km/h) |
| 80 mph (128.75 km/h) | 86.03 mph (138.46 km/h) |
| 85 mph (136.79 km/h) | 91.41 mph (147.11 km/h) |
| 90 mph (144.84 km/h) | 96.79 mph (155.77 km/h) |
| 95 mph (152.89 km/h) | 102.17 mph (164.42 km/h) |
| 100 mph (160.93 km/h) | 107.54 mph (173.07 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1758 | 2043 | 2200 | 2297 | 2402 | 2477 | 2559 | 2656 | 2791 | 2926 | 3075 | 3195 | 3412 | 3651 | 3838 | 3958 | 4025 | 4272 | 4617 | 5365 |
Better Fuel Economy Factory Ratios Increased Power
