I couldnt find any onfo on drifing and emaxx, but i decided to give it a go anyway.

I bought some new savage wheels, and measured the diameter.
Although they list as being 83mm, the outermost part of plastic (the bead) is actually 90mm... and you can buy 90mm stormwater pipe fittings!
So, i picked up some 90mm stormwater pipe end caps, and we'll see how it goes