Bearing is much larger than those used in plastic generations. It is a shielded ball bearing, same as before, though.
That said, I think we've missed something. That is, it's usage for attack, which still needs looking into. Admittedly, it's not really up to the high standard of Variares, but it is a very capable wheel, aided by it's stamina and the flywheel effect (if you can find some info on burn-based attackers, it's the same concept). Jus' saying, we may want to look into that before we put the article up. (Though I wouldn't mind if we added it later, that's not beywiki practice).
EDIT: Definitely deserves an attack section, the very specific combo MF-F Phantom (attack) Cancer AD145RF is rather impressive.