Originally Posted by Cat0020
Not all 20" BMX wheels are meant to handle the abuse of trials riding, especially BMX wheels from WallyWorld. Thin axles, loosely tensioned spokes, steel rims.. add together to be heavy and weak wheels.
High end trials wheels have cutouts between spokes, drilled sidewall on the rim to save weight without reducing the strength of the rim significantly:
+1 I have broken a lot of wheels, axles, and headsets doing trials-y things on cheap bikes. I don't learn though, I just keep finding cheap stuff at yard sales.