I dont know the TW012... but if they are the white dish rims delivered in the kit, then they're way to fragile. I mounted a set recently, and this was the first set I ever threw away *before* the tires were worn out... the outside front rim was broken at least at 8 different places. The wheel looked closer to an octogon than a circle.
Yes, I do too hit boards sometimes...
Back to JB rims
Paul