[Sammus]

I balance all my wheels/tyres. I find the wheels are always almost perfectly balanced as is, conversely the tyres almost never are. Often you can feel the rubber is thicker on one side of the tyre. I balance the tyres with tape on the inside of the tyre (further from the centre means you need less material).

Also I think the advantage of gluing is the much lower weight and rotational inertia of the wheel. Not so much a problem for bashing I guess, but you'd never use beadlocks on a racer :P