Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 130/60-21 | 120/50-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.14 (689.4) | 25.72 (653.4) | -1.42 (-36) -5.2% |
| Width inches (mm) | 5.12 (130) | 4.72 (120) | -0.39 (-10) -7.7% |
| Circum. inches (mm) | 85.27 (2165.81) | 80.82 (2052.72) | -4.45 (-113.1) -5.2% |
| Sidewall Height inches (mm) | 3.07 (78) | 2.36 (60) | -0.71 (-18) -23.1% |
| Revolutions per mile (km) | 743.07 (461.72) | 784.01 (487.16) | 40.94 (25.44) 5.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.96 mph (30.51 km/h) |
| 25 mph (40.23 km/h) | 23.69 mph (38.13 km/h) |
| 30 mph (48.28 km/h) | 28.43 mph (45.76 km/h) |
| 35 mph (56.33 km/h) | 33.17 mph (53.39 km/h) |
| 40 mph (64.37 km/h) | 37.91 mph (61.01 km/h) |
| 45 mph (72.42 km/h) | 42.65 mph (68.64 km/h) |
| 50 mph (80.47 km/h) | 47.39 mph (76.27 km/h) |
| 55 mph (88.51 km/h) | 52.13 mph (83.89 km/h) |
| 60 mph (96.56 km/h) | 56.87 mph (91.52 km/h) |
| 65 mph (104.61 km/h) | 61.61 mph (99.15 km/h) |
| 70 mph (112.65 km/h) | 66.34 mph (106.77 km/h) |
| 75 mph (120.7 km/h) | 71.08 mph (114.4 km/h) |
| 80 mph (128.75 km/h) | 75.82 mph (122.02 km/h) |
| 85 mph (136.79 km/h) | 80.56 mph (129.65 km/h) |
| 90 mph (144.84 km/h) | 85.3 mph (137.28 km/h) |
| 95 mph (152.89 km/h) | 90.04 mph (144.9 km/h) |
| 100 mph (160.93 km/h) | 94.78 mph (152.53 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1995 | 2318 | 2496 | 2606 | 2725 | 2810 | 2904 | 3014 | 3167 | 3320 | 3489 | 3625 | 3871 | 4143 | 4355 | 4491 | 4568 | 4848 | 5238 | 6087 |
Better Fuel Economy Factory Ratios Increased Power
