Just buy the 1/16 Summit tires. Gear it like the Summit. They're not much different.
https://www.amainhobbies.com/traxxas-premounted-canyon-at-tires-geode-beadlock-2-chrome-blue-tra7274/p191354?gclid=CjwKCAiA-vOsBhAAEiwAIWR0TfHhe_wbPuXPSg_ayHFGZjHfRfbU_XOKTGJybnPaEeiIDMkUyjliFBoC-3wQAvD_BwE...