I designed this wheel pod for use with a 40 mm diameter tire with a width of 15 mm or less. The axle hole is 1 mm to mark the bottom most point for the axel of CF rod or equivalent music wire. The exact dimensions of the wheel well is 43 mm length by 17 mm wide with the hole 25 mm from the top plate. This should allow plenty of clearance for a light weight foam wheel. and provide a scale appearance for a larger glider/ sail plane estimated weight is 11 grams
I used a 1.5 inch Dave Brown "Light Flight" wheel and all up with 3m adhesive it weighs 16 grams I drilled out the mounting hole to make a perfect fit for my axle and used card stock as a spacer to keep the wheel centered. I used a Plastic safe CA to fasten the axle to the holes.
The foam wheels I based this design off of are available here http://tinyurl.com/40mmtire