Bronson Speed Co. G2 Bearings Balls sit and roll deeper in the raceway channels than weaker shallow groove designs. Reduces axial and angular side impact damage and breakage, surfaces stay smooth and fast. Non-contact rubber shields fit deep in the inner race edge- reduces oil leak and dirt & moisture intrusion. Free spinning, durable, pop off resistant shields, serviceable, remove-able, easy to clean and re-install. Oil is blended with nano-ceramic compounds for anti-wear protection for longer lasting bearings and improved speed. Light and smooth- with additives that resist rust, moisture, corrosion and oxidation for prolonged oil life. 100% hand inspected twice and micro-polished and ultrasonic solvent washed 3X prior to final lubrication. Packaged in nitrogen filled shrink-wrap - reduces metal and oil oxidation until ready to be ridden.