Probably the most important component on the scooter
"This component bears the most stress in the whole scooter as they allow the wheels to move smoothly; thus is the first piece to be worn out. Glad that these are now sold separately on their own, as previously had to replace the whole wheel rather than the ball bearings alone. The only weak point of this component is the thin stainless steel layer that holds the ball bearings within the frame; this is the part that often fails after much use. Then again, it's still better to replace the bearings alone, rather than replacing the whole wheel."
