They seem to have copied the D1 spec style, Which are the "Genuine" ones if that's what you mean, ep-racing do them here People have had problems with the D1 spec ones, but weather they where genuine or not I don't know. The ones above are genuine (hence the price), had them a few months now problems up to yet! I'd say it's almost mandatory to get them all torqued up the same. ep-racing reccomend 100nm and the actual D1 spec manufacturer reccomend 120nm maximum, had no problems with 100nm. I check them each time I wash my car, and no movement in them at all. Most of the D1 ones have a 60 degree taper, Not sure if Rota wheels vary in the taper angle between alloys, I'm sure someone can tell you what taper they have if you have a specific rota alloy.