Brand new high-speed ball-bearings produced especially for XRAY. ID x OD x level (mm) = 10x15x4. Range 2 pieces. Top-quality specialist ball-bearings for a super-free, super-smooth drivetrain. These best quality ball-bearings are fitted with unique rubber covers, and perhaps they are degreased and lightly oiled with AeroShell Fluid 12 oil for maximum smoothness, longevity, most useful threshold and optimum performance.
These ball-bearings do have more (and larger) balls in the cage versus regular ball-bearings, making them more resilient under lots. The medial side covers are really easy to eradicate for quick and comfortable servicing. These ultra-high precision ball bearings are made to withstand all extremes at track under race conditions if not just enjoyable battle. A "must have" product!
