Upgrading the plastic rollers to metal bearings give the wheel a much smoother feel. It also cuts down on premature wear on the motor.
3mmx8mmx4mm Double Shielded Miniature Deep Groove Ball Bearing [ Ссылка ]
![](https://i.ytimg.com/vi/XRws_yhlFIQ/maxresdefault.jpg)
Upgrading the plastic rollers to metal bearings give the wheel a much smoother feel. It also cuts down on premature wear on the motor.
3mmx8mmx4mm Double Shielded Miniature Deep Groove Ball Bearing [ Ссылка ]