2021 Monster Energy AMA Supercross Championship Arlington 3 (West): 450SX Group B Qualifying 1 Results
250SX West March 20, 2021
450SX Group B Qualifying 1 Results
| Rider | Time | Interval | Best Lap | Hometown | Bike | |
|---|---|---|---|---|---|---|
| 1 |  Mitchell Oldenburg | 51.7500 | Alvord, TX  | Honda CRF450R | ||
| 2 |  Brandon Hartranft | 52.3810 | Brick, NJ | Suzuki RM-Z450 | ||
| 3 |  Cade Clason | 52.6040 | Arcadia, OH | Kawasaki KX450 | ||
| 4 |  Kevin Moranz | 53.2620 | Topeka, KS | KTM 450 SX-F | ||
| 5 |  Josh Cartwright | 53.3160 | Fort Worth, TX | Kawasaki KX450 | ||
| 6 |  AJ Catanzaro | 53.3440 | Portland, CT | Kawasaki KX450 | ||
| 7 |  Henry Miller | 53.5800 | Rochester, MN | KTM 450 SX-F | ||
| 8 |  Logan Karnow | 53.7690 | Vermilion, OH | Kawasaki KX450 | ||
| 9 |  Ronnie Stewart | 54.1510 | Easton, PA | GasGas MC 450F | ||
| 10 |  Lane Shaw | 54.1950 | Alvin, TX | KTM 250 SX-F | ||
| 11 |  Joan Cros | 54.2110 | Manlleu, Spain  | Kawasaki KX450 | ||
| 12 |  Hunter Schlosser | 54.2250 | El Paso, TX | Yamaha YZ250F | ||
| 13 |  Jeremy Smith | 54.9190 | Marmora, NJ | Kawasaki KX450 | ||
| 14 |  Vann Martin | 55.3350 | Houston, TX | Husqvarna FC 450 | ||
| 15 |  Scotty Wennerstrom | 55.4120 | Tyler, TX | Kawasaki KX450 |
