Balancing the Tire

The balancing procedure is simple. The difference is experience (which makes 
a half hour job only take a few minutes).

With no weights, give the wheel a little spin and when it stops, mark the top 
of the wheel with chalk. Give it another spin. If it comes up to the same 
point, you are not balanced. Duct tape a piece of weight to the top of the 
wheel, then give it another little spin. If the same spot comes up again, it 
wasn't enough weight. Tape a little more and give it another spin. If the 
weight comes up on the bottom now, you added too much. Eventually, you'll 
get the wheel balanced when it stops in pretty much random positions each 
time it is spinned.

This is a very time consuming process. The pros don't spin the wheel, they 
nudge it. If it accelerates quickly, you know you need to add a lot of weight 
and you can stop the wheel right away and tape more on. When you nudge the 
wheel and it slows instead of accelerates, you know you are close and you can 
wait to see it stop.

Don't be surprised if it comes up in one of two or three positions all the 
time, but more weight or less weight makes it clearly unbalanced. This is as 
close as you are going to get to perfect balance and the tire will feel fine 
on the bike.

After figuring out how much weight is needed, mark where the weights are with 
chalk, then remove them. Clean the rim with contact cleaner, and apply the 
permanent weights of the same amount. Give it one last nudge to make sure the 
balance is correct, then tape the weights in place.