those are with the original Spin disc brake hub, purchased them on eBay this summer, not for cheap but considering the prices of today can say got them cheap.. originally paid for them 600$ but got an partial refund of 50$ since the seller didnt mentioned that the rear wheel has a lateral moment of 1-2mm, which its nothing for my opinion lol.. no up and down.. no wear whatsoever on braking area.. cant even feel the bearings when spinning the wheel, silky smooth .. used them for 3-4 month with v-brake and now im installing the front disc rotor .. hat trouble since this model of hub was designed to use M5 screws but not the current standart of 10mm.. it wold need at least 18mm of length to tight properly the rotor.. could find those screws where i live and ordered them on ebay.. till then, the rotor its on the bike just for cosmetically purpose lol.
sorry for the terrible english lol..