Looks like the diameter of the shell is slightly too small and the hoop goes down too low. Still, I don't see why you should have problems triggering the rim - you'd be hitting the shell rim instead of the hoop, though on second thoughts I don't think that will be very good for the mesh head.
I bought cheap toms from Thomann and cut them in half, it works out really cheap. I later covered the shells with imitation wood vinyl and they look great. I wouldn't get 8" ones though, I did that and a few years later went and bought some 10" ones because I didn't like them being so small. Ideally I'd like a 12" for the snare and floor tom and keep the 10" for the rack toms, but I can't be bothered...