The Opium C Directset's outer races are formed from 52100 bearing steel with a black finish. Its good looks cover some thorough engineering though. It features custom made, 34 ball, full complement (max) bearings both top and bottom. For Downhill racing, nothing else will do. Crank brothers are so confident in the strength of this design that they offer a full 5 year warranty on the bearings in all of their Directsets.

weight - 66.5g
size - 1 1/8in.
stack height - 21mm including crown race
material - 52100 bearing steel
upper bearings - sealed 34-ball max
lower bearings - sealed 34-ball max
warranty - 5years