Enduro Bearings BB 6801 LLU MAX-4 Suspension Bearing (12 x 21 4 mm) MAX ABEC-3

52100 CHROME STEEL - Used for the most popular and affordable bearings in the range. It is heat treated and subjected to cryogenic treatment at -310 degrees Fahrenheit to optimize the crystal structure and prolong its useful life, especially in combination with ceramic balls. ABEC-3 - Enduro's ABEC 3 and ABEC 5 bearings, designed specifically for cycling use, offer deeper throats and larger diameter balls in every available size to increase strength and durability. MAX: By eliminating the ball cage, you free up space inside the bearing to insert more balls, thus increasing the load capacity by 35%-40%. The result is a significantly stronger and more durable bearing, which maintains the same compact size as conventional cage bearings or plain bearings commonly used in suspension pins. Inner diameter: 12 mm Outer diameter: 21 mm