How to clean bottom tube bearings (those around pivot pin)?

Sorry, that’s wrong…

Correction:

100-03 (“upper” bearing) = 6802Z = 15 x 24 x 5 mm

100-04 (“lower” bearing) = 6803Z = 17 x 26 x 5 mm

Strida part nr. - DIN identification - inner Ø x outer Ø x width