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the interfeerence fit is them on the axle
Nope, the inner race is a slip fit on the Novatec axle. If there's an assembly "issue", it's that you have to press on both inner and outer races simultaneously with a reasonably flat tool, as the outer race is pressed into the hub shell but the axial stop is where the inner race hits the shoulder.
The minor advantage which would accrue to the Miche design if it was implemented well is that it allows the bearings to be preloaded, just like traditional loose-ball angular contact ("cup and cone") bearings. In the Novatec design (shared with most other modern hubs, BTW), the bearing clearance is determined by the manufactured clearance of the cartridges.
gbj_tester
@thecycleclcinic
As for Miche hubs the lack of the shoulder on the axle is bonus in one respect. put shoulders on the axle means you are pressing a bearing in over the axle and the interfeerence fit is them on the axle. it require much tighter tollerance to work properly and on a double sided hub it adds an obvious complication, reassembly has to done correctly otherwise do it backward and you have mis matching tollerances. nothing wrong with Miche design it is quite reliable. If your prone to cocking up bearing preload dont do it your self.