This link [1] can be used to order spare ball bearings from a non-LEGO source. The LEGO parts are quite pricey and often back-ordered. This Fastenal part is compatible and much less expensive.
This link [1] can be used to order spare ball bearings from a non-LEGO source. The LEGO parts are quite pricey and often back-ordered. This Fastenal part is compatible and much less expensive.
Links
[1] https://www.fastenal.com/products/details/0987745