New high-speed ball-bearings produced made for XRAY. ID x OD x degree (mm) = 12 x 18 x 4. couple of 2.
Top-quality expert ball-bearings for a super-free, super-smooth drivetrain. These finest quality ball-bearings are fitted with original synthetic covers, and generally speaking are degreased and very carefully oiled with AeroShell Fluid 12 oil for optimum smoothness, longevity, most readily useful limit and maximum performance. These ball-bearings do have more (and larger) balls inside the cage versus regular ball-bearings, making them more resilient under lots. The medial side covers are actually easy to expel for fast and comfortable servicing. These ultra-high accuracy ball bearings are created to withstand all extremes at track under battle conditions or just fun competition. A "must have" item!
