New high-speed ball-bearings produced designed for XRAY. ID x OD x level (mm) = 12 x 18 x 4. pair of 2.
Top-quality expert ball-bearings for a super-free, super-smooth drivetrain. These finest quality ball-bearings are fitted with exclusive artificial covers, and generally are degreased and gently oiled with AeroShell Fluid 12 oil for optimum smoothness, longevity, greatest threshold and optimum performance. These ball-bearings have more (and bigger) balls in the cage versus regular ball-bearings, making them even more resilient under lots. The medial side covers are easy to eradicate for fast and comfortable servicing. These ultra-high precision ball bearings are created to withstand all extremes at track under battle conditions or simply fun competition. A "must have" item!
