IIRC Bridgstones (or another well known brand) had a dot on the tire that you line up with the valve stem for a good balance start. I think dynanic balance cannot be had with a bubble but it may not need it either.
They have two dots. A red one and a yellow one. The red one lines up with the lightest part of the wheel (normally the valve stem hole) and the yellow one lines up with the heaviest part of the wheel.
