Cadax ceramic bearings j-w as per pic.
Blue colour left. (black, gold, red & siver sold out)
C/w both type bushings compatible for screws from Shimano & SRAM.
689 ZrO2 (Zirconium Oxide) full ceramic balls 17x9x5mm.
Full Ceramic bearings are specially designed for use with motorcycles, road/mountain bicycles and other demanding applications seeking to reduce rolling resistance and weight.
Longer lasting alloy material than composite plastic.
Eliminate lateral play and improving shifting precision.
Decrease rolling resistance and improve drivetrain efficiency.
SGD 40/pair. (click below website to watch spin video or simply google "cadax" in youtube)