New high-speed ball-bearings manufactured particularly for XRAY. ID x OD x depth (mm) = 5x12x4. Pair of 2 pieces.
Top-quality expert ball-bearings for a super-free, super-smooth drivetrain. These highest quality ball-bearings are fitted with unique rubber covers, and they are degreased and lightly oiled with AeroShell Fluid 12 oil for optimum smoothness, endurance, highest threshold and optimum performance.
These ball-bearings have more (and bigger) balls inside the cage compared to regular ball-bearings, making them far more resilient under lots. The medial side covers are easy to eliminate for quick and easy maintentance.
