Brand new high-speed ball-bearings produced especially for XRAY. ID x OD x thickness (mm) = 5x12x4. Set of 2 pieces.
Top-quality professional ball-bearings for a super-free, super-smooth drivetrain. These highest quality ball-bearings are fitted with unique plastic covers, and are usually degreased and lightly oiled with AeroShell Fluid 12 oil for maximum smoothness, long life, highest tolerance and maximum performance.
These ball-bearings do have more (and bigger) balls in the cage than the regular ball-bearings, making them more resilient under loads. The side covers are easy to eliminate for fast and simple maintentance.