Wheel Bearings

all balls, and as with any sealed bearing, be sure to pick the seal and pack some good red waterproof grease in there, they dont come with enuf grease to even
"run one off"
 
yeah they're pre-packed, with maybe enuf to mastrubate with, but definately not enuf for them to last long, have you ever picked the seal ????
there may be a finger full in there
and red waterproof is the best for anything that may be submersed in water, with just regular black grease the water will mix with it and turn to doo doo