Nitrogen and Dyna
Beads is the way to go. When you Balance a tire and wheel, that is the beginning of becoming unbalanced, hitting a hole, wear, changing air pressure all sorts of stuff affect the balance, With the balancing beads, it's always being re balanced as it turns. So, no matter what is going on, it's in balance from day you put it on until you take it off, at any speed and any wear. What Dyna says on their website has always been true for me. I like using them. I toss mine in when I get my tires mounted - still in the bag, Bag bursts as you ride and wha la! And I am lucky enough a local tire shop will mount my tires for free. Spoke or not no difference.