Just got stuck barely started into the next phase in my Predator's never ending ship of thesius journey when i ran into this wheel problem. I have sitting on my desk 12 new wheels, that are far too large.
Standard wheels are 24mm, Predator is using 15.25mm "mini v wheels" which can be easily searched on amazon.
Not recommending these, but this is what i ordered:
https://www.amazon.com/gp/product/B0BQQLVXRL/ref=ewc_pr_img_1?smid=ALO3XPILH8M0H&th=1