no . (just clean and replace bearings once in a long time) (bearings look like this below)
https://abload.de/img/mavic-6bvb43.jpg
https://abload.de/img/mavic-7kvu3y.jpg
https://www.bocabearings.com/product...0-th9-c3c-2953 .
but you have to use a washer or something as mentioned above because it's supposed to be 9mm wide
bearings (replacement): boca bearings 16x30x7 (width is 2mm too short) were the only replacements i could find - would work with 20x30x2 aluminum washer as a spacer OD=30 ID>20 (or might be able to drill out small washer to fit on other side of bearings (inner) but check parts to confirm)