Wheels Manufacturing Sealed Bearing

ABEC-3 is a precision standard that dictates tighter tolerances for the bearing's internal components. In practical terms, this means the bearing will spin more smoothly and with less friction than lower-grade options, contributing to a more efficient drivetrain.

The 6806/29 is a specific size designation. You must verify that your current bottom bracket or hub specifically calls for a 6806/29 bearing, as bicycle bearings are not universal. Check the markings on your existing bearing or consult your bottom bracket's technical manual before purchasing.

Yes, the sealed cartridge design is specifically engineered to keep out contaminants like dirt, mud, and water. While no bearing is completely impervious to the elements, this sealed unit offers significantly better protection and longevity than open or poorly shielded alternatives.

These bearings come pre-greased from the factory and are ready to install right out of the box. You do not need to add additional lubricant before pressing them into your bottom bracket.

It is generally best practice to replace both bearings in your bottom bracket at the same time. Since both bearings experience similar wear and tear, replacing them as a pair ensures consistent performance and prevents you from having to disassemble the drivetrain again shortly after.