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>wheel hub has 60002RS deep groove cartridge bearings
>deep groove bearings are not designed for high axial (side to side) loads
>bearing dust cover has NO LOCK NUT, it lies directly on the inner race and serves as a contract point to the fork at the same time
>due to not having a lock nut, it can move freely on the axle threads when the wheel is off the bike
>everytime you put the wheel back on you inadvertently crush the bearings a little bit against the inner race due to the thread tolerance
Bearings dead and crunchy within a year. These people engineered the rest of the bike and hundreds of thousands of people ride them.