Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 130/60-21 | 120/60-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.14 (689.4) | 26.67 (677.4) | -0.47 (-12) -1.7% |
| Width inches (mm) | 5.12 (130) | 4.72 (120) | -0.39 (-10) -7.7% |
| Circum. inches (mm) | 85.27 (2165.81) | 83.78 (2128.11) | -1.48 (-37.7) -1.7% |
| Sidewall Height inches (mm) | 3.07 (78) | 2.83 (72) | -0.24 (-6) -7.7% |
| Revolutions per mile (km) | 743.07 (461.72) | 756.23 (469.9) | 13.16 (8.18) 1.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.65 mph (31.63 km/h) |
| 25 mph (40.23 km/h) | 24.56 mph (39.53 km/h) |
| 30 mph (48.28 km/h) | 29.48 mph (47.44 km/h) |
| 35 mph (56.33 km/h) | 34.39 mph (55.35 km/h) |
| 40 mph (64.37 km/h) | 39.3 mph (63.25 km/h) |
| 45 mph (72.42 km/h) | 44.22 mph (71.16 km/h) |
| 50 mph (80.47 km/h) | 49.13 mph (79.07 km/h) |
| 55 mph (88.51 km/h) | 54.04 mph (86.97 km/h) |
| 60 mph (96.56 km/h) | 58.96 mph (94.88 km/h) |
| 65 mph (104.61 km/h) | 63.87 mph (102.79 km/h) |
| 70 mph (112.65 km/h) | 68.78 mph (110.69 km/h) |
| 75 mph (120.7 km/h) | 73.69 mph (118.6 km/h) |
| 80 mph (128.75 km/h) | 78.61 mph (126.51 km/h) |
| 85 mph (136.79 km/h) | 83.52 mph (134.41 km/h) |
| 90 mph (144.84 km/h) | 88.43 mph (142.32 km/h) |
| 95 mph (152.89 km/h) | 93.35 mph (150.23 km/h) |
| 100 mph (160.93 km/h) | 98.26 mph (158.13 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1924 | 2236 | 2408 | 2514 | 2629 | 2711 | 2801 | 2907 | 3055 | 3202 | 3366 | 3497 | 3734 | 3996 | 4201 | 4332 | 4406 | 4676 | 5053 | 5872 |
Better Fuel Economy Factory Ratios Increased Power
