A friend has tried them – says there is a slight but noticeable difference.
I read that it changes the sag, 2 bearings changes it more than 1 so 2 makes a difference- but it was only by a couple of %.
“2:1 leverage ratio Maelstrom using a 190lb coil, i get 32% sag. With one of these bearings above the coil i get 36% sag. With a bearing above AND below i get 40% sag.”
I’ve fitted mine to a glory and can’t actually see the bearing rotate at when I bounce up and down – not ridden it mind.
Still, its called a Needle Thrust roller bearing – or axial load bearing whats coller than that ?
I’m sure flange fits in there as well.