Sold my Chariot and they didn't want these extra tires.
I have two Panaracer Smoke MTB/BMX tires for a kids bike or bike trailer. They're in really good condition. I used the slicks on the Chariot. So, these were garage-stored and look almost unused. Marked as "for rear use" but can be used on the front. Rear use is simply a speed issue.
I'll throw in a 20 x 1.75-2.1 Schrader bike tube that I don't need anymore.