New high-speed ball-bearings produced specifically for XRAY. ID x OD x thickness (mm) = 5x9x3. Group of 2 pieces. Top-quality expert ball-bearings for a super-free, super-smooth drivetrain. These best quality ball-bearings are fitted with unique plastic covers, and are usually degreased and lightly oiled with AeroShell Fluid 12 oil for optimum smoothness, longevity, highest threshold and optimum performance.
These ball-bearings have significantly more (and larger) balls in the cage compared to the regular ball-bearings, making them alot more resilient under lots. The side covers are easy to remove for fast and comfortable servicing. These ultra-high precision ball bearings are created to withstand all extremes at the track under race conditions and sometimes even simply fun racing. A "must have" product!
