https://www.ebay.co.uk/itm/OMNI-Racer-Worlds-Lightest-TiN-Titanium-Ceramic-Bearing-6902-61902-15x28x7mm/372178291201?ssPageName=STRK:MEBIDX:IT&_trksid=p2060353.m1438.l2649full ceramic bearings, nearly 4 times price of standard and a total waste of money. Don't bother, just saying it's mostly hype ref ceramic imho