Do the "pros" use center-trac or some kind of concave bearings?

But it does not say either way on the site here what number of balls the bearings have.

Sure fire way if you have the bearing is to deshield it and count the balls.
If you’re ordering one, if it isn’t a one drop 10 ball bearing, it’s safe to assume that it only has 8 balls. :wink:

So how do you de-shield it? Is that what Bob Barker is always talking about?

You gotta remove the c-clip and it’ll just come right off

Nice Thanks!