New high-speed ball-bearings produced specially for XRAY. ID x OD x depth (mm) = 5x8x2.5mm. Pair of 2 pieces. Top-quality expert ball-bearings for a super-free, super-smooth drivetrain. These highest quality ball-bearings are fitted with special rubber covers, and tend to be degreased and gently oiled with AeroShell Fluid 12 oil for maximum smoothness, longevity, highest threshold and maximum performance.
These ball-bearings have more (and larger) balls in the cage compared to regular ball-bearings, making them far more resilient under loads. Along side it covers are really easy to remove for quick and comfortable servicing. These ultra-high accuracy ball bearings are made to withstand all extremes on track under race conditions and/or simply fun racing. A "must have" product!