Keep your bicycle drivetrain running smoothly with this 6805-2RS ball bearing, precision-engineered as a direct replacement part for bicycle bottom bracket BB70 applications. Built from durable GCr15 chrome steel, this bearing is rated to ABEC-7 precision grade, ensuring smooth, efficient rotation and reliable long-term performance under demanding cycling conditions. The double-sealed 2RS design effectively locks in grease while keeping out dirt, dust, and moisture, significantly extending the service life of the bearing. Each bearing comes pre-greased and is ready for installation right out of the box, making maintenance and repair straightforward. Whether you are a professional mechanic or a dedicated cycling enthusiast performing your own repairs, this ball bearing delivers the quality and consistency needed to restore your bottom bracket to peak performance. Sold individually.