Although the stock foam wheels worked ok on my first flights, they seemed a bit small and soft for the job. After sitting in my trailer for days, the foam would retain a flat spot that made for an uneven roll.

I decided to replace the stock wheels with bigger 2-1/2" Dubro Treaded Lightweight Wheels (250TL). The 5/32" (4mm) axle diameter was perfect for the stock hardware and I only needed to round the outer ends of the pant opening. The firmer rubber wheel should provide for better ground handling.