Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/70-21 | 120/50-26 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.61 (701.4) | 30.72 (780.4) | 3.11 (79) 11.3% |
| Width inches (mm) | 4.72 (120) | 4.72 (120) | 0 (0) 0% |
| Circum. inches (mm) | 86.75 (2203.51) | 96.52 (2451.7) | 9.77 (248.19) 11.3% |
| Sidewall Height inches (mm) | 3.31 (84) | 2.36 (60) | -0.94 (-24) -28.6% |
| Revolutions per mile (km) | 730.35 (453.82) | 656.42 (407.88) | -73.93 (-45.94) -10.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.25 mph (35.81 km/h) |
| 25 mph (40.23 km/h) | 27.82 mph (44.77 km/h) |
| 30 mph (48.28 km/h) | 33.38 mph (53.72 km/h) |
| 35 mph (56.33 km/h) | 38.94 mph (62.67 km/h) |
| 40 mph (64.37 km/h) | 44.51 mph (71.62 km/h) |
| 45 mph (72.42 km/h) | 50.07 mph (80.58 km/h) |
| 50 mph (80.47 km/h) | 55.63 mph (89.53 km/h) |
| 55 mph (88.51 km/h) | 61.19 mph (98.48 km/h) |
| 60 mph (96.56 km/h) | 66.76 mph (107.44 km/h) |
| 65 mph (104.61 km/h) | 72.32 mph (116.39 km/h) |
| 70 mph (112.65 km/h) | 77.88 mph (125.34 km/h) |
| 75 mph (120.7 km/h) | 83.45 mph (134.3 km/h) |
| 80 mph (128.75 km/h) | 89.01 mph (143.25 km/h) |
| 85 mph (136.79 km/h) | 94.57 mph (152.2 km/h) |
| 90 mph (144.84 km/h) | 100.14 mph (161.15 km/h) |
| 95 mph (152.89 km/h) | 105.7 mph (170.11 km/h) |
| 100 mph (160.93 km/h) | 111.26 mph (179.06 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1670 | 1941 | 2090 | 2182 | 2282 | 2353 | 2431 | 2523 | 2651 | 2779 | 2922 | 3035 | 3241 | 3469 | 3647 | 3760 | 3824 | 4059 | 4386 | 5097 |
Better Fuel Economy Factory Ratios Increased Power
