I was looking at 6001 ceramics like these for my ambrosios (same hubs?).
Ceramic 22 notes per bearing though http://www.petracycles.co.uk/product_info.php?language=en¤cy=GBP&products_id=18570&source=googlepbs or £8 a pair for rubber sealed steel. http://www.cyclestore.co.uk/productDetails.asp?productID=7715
@Smallfurry started
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I was looking at 6001 ceramics like these for my ambrosios (same hubs?).
Ceramic 22 notes per bearing though
http://www.petracycles.co.uk/product_info.php?language=en¤cy=GBP&products_id=18570&source=googlepbs
or £8 a pair for rubber sealed steel.
http://www.cyclestore.co.uk/productDetails.asp?productID=7715