Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 130/60-21 | 130/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.14 (689.4) | 25.17 (639.2) | -1.98 (-50.2) -7.3% |
| Width inches (mm) | 5.12 (130) | 5.12 (130) | 0 (0) 0% |
| Circum. inches (mm) | 85.27 (2165.81) | 79.06 (2008.11) | -6.21 (-157.71) -7.3% |
| Sidewall Height inches (mm) | 3.07 (78) | 3.58 (91) | 0.51 (13) 16.7% |
| Revolutions per mile (km) | 743.07 (461.72) | 801.42 (497.98) | 58.36 (36.26) 7.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.54 mph (29.84 km/h) |
| 25 mph (40.23 km/h) | 23.18 mph (37.3 km/h) |
| 30 mph (48.28 km/h) | 27.82 mph (44.76 km/h) |
| 35 mph (56.33 km/h) | 32.45 mph (52.23 km/h) |
| 40 mph (64.37 km/h) | 37.09 mph (59.69 km/h) |
| 45 mph (72.42 km/h) | 41.72 mph (67.15 km/h) |
| 50 mph (80.47 km/h) | 46.36 mph (74.61 km/h) |
| 55 mph (88.51 km/h) | 51 mph (82.07 km/h) |
| 60 mph (96.56 km/h) | 55.63 mph (89.53 km/h) |
| 65 mph (104.61 km/h) | 60.27 mph (96.99 km/h) |
| 70 mph (112.65 km/h) | 64.9 mph (104.45 km/h) |
| 75 mph (120.7 km/h) | 69.54 mph (111.91 km/h) |
| 80 mph (128.75 km/h) | 74.17 mph (119.37 km/h) |
| 85 mph (136.79 km/h) | 78.81 mph (126.83 km/h) |
| 90 mph (144.84 km/h) | 83.45 mph (134.29 km/h) |
| 95 mph (152.89 km/h) | 88.08 mph (141.76 km/h) |
| 100 mph (160.93 km/h) | 92.72 mph (149.22 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2039 | 2369 | 2552 | 2664 | 2786 | 2873 | 2968 | 3081 | 3237 | 3393 | 3567 | 3706 | 3957 | 4235 | 4452 | 4591 | 4669 | 4955 | 5355 | 6223 |
Better Fuel Economy Factory Ratios Increased Power
