What can i do if only one of my wheels work on my robots?

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Interesting, your VEX Air drone has wheels?

Please categorize your topics correctly, so you can get the help you need. If you categorize your topics under IQ, which I assume is what you participate in, the IQ forum members would get a little notification and would be alerted to help you. And speaking of that help,

Might want to give this a quick read. Would greatly help to improve the quality of future posts, which in turn will greatly improve the quality of help you can receive.