I just got a second set of skf bearings in the mail today, and now I'm really scratching my head. Had ordered another set recently to enable a smoother crank but that they were very stiff and didn't roll freely. Haven't not really realized this til I installed them, i opted to order another set instead of trying to return them because i know I'd ruin them taking them off. The new set came in and yet again, doesn't roll freely. Is there something I'm missing? Are these supposed to loosen up or something? I don't exactly want to snap something, having the cylinder fighting the crack. -motobecane 50v