After I switched to the RP 400 greens (no snap ring), that are firmly attached to a stronger than stock flange plate, my spooled 8 3/4" stopped chattering the stock tapered axle bearing's .012 end play, on slow turns in the pits and driveway turns. They are firmer so the tire squirms evenly on turns instead of chipping. And if you use the disc type (MO400) with disc's you get even more control of the axle, through the caliper to the housings firm mounting.
I like the tool that cracks the retaining collar for the upgrade to Greens, instead of the chisel method or cutting.