ENDURO BKC-0021 – 1/4 (0.25) Grade 5 Si3N4 Ceramic Balls (50 Pieces)

ENDURO BKC-0021 Grade 5 Si3N4 Ceramic Balls are high-quality precision ceramic bearing balls designed for cyclists and performance-focused applications where smooth operation and durability matter. Manufactured from premium Silicon Nitride (Si3N4), these ceramic balls provide excellent strength while remaining significantly lighter than traditional steel balls. Their Grade 5 precision ensures extremely tight tolerances and a highly accurate spherical shape, helping reduce rolling resistance and improve bearing efficiency. These ceramic balls are ideal for replacing worn bearing balls or upgrading hubs, bottom brackets, and other bicycle bearing systems. They are highly resistant to corrosion, heat, and wear, making them suitable for demanding riding conditions and long-term use. This pack includes 50 precision-made ceramic balls designed to deliver smoother rotation and reliable performance.

Key Features

• Material: Premium Silicon Nitride (Si3N4) ceramic

• Precision Grade: Grade 5 high-precision tolerance

• Ball Size: 1/4 inch (0.25 inch)

• Quantity: 50 pieces

• Lightweight Design: Weighs less than traditional steel balls

• Reduced Friction: Supports smoother bearing movement

• Corrosion Resistant: Does not rust under wet conditions

• High Wear Resistance: Built for long-term durability

• Heat Resistant: Performs reliably under demanding conditions

• Suitable For: Bearing maintenance, replacement, and performance upgrades

Product Specifications

• Brand: Enduro

• Model: BKC-0021

• Product Type: Ceramic Bearing Balls

• Material: Silicon Nitride (Si3N4)

• Precision Grade: Grade 5

• Diameter: 1/4 inch (0.25 inch)

• Pieces Per Pack: 50

• Color: Ceramic finish

• Application: Bearings and cycling component upgrades

Bearing Performance Benefits

• Lower Rolling Resistance: Ceramic material creates smoother movement and improved bearing efficiency

• Higher Hardness: Stronger surface helps reduce wear over extended use

• Long Service Life: Resistant to corrosion and environmental damage

• Improved Speed: Helps maintain smooth and consistent rotation

• Stable Performance: Performs well across varying temperatures and riding conditions

Easy Operation / Usage

• Remove worn or damaged bearing balls from the component

• Clean the bearing race thoroughly before installation

• Install the ceramic balls carefully and evenly

• Apply suitable bearing grease if required

• Reassemble the component and check for smooth rotation

Why Choose This Product

• Precision Grade 5 manufacturing for excellent accuracy

• Lightweight ceramic construction improves performance

• Strong resistance against rust and wear

• Helps improve bearing smoothness and efficiency

• Suitable for cycling enthusiasts and performance upgrades

• Reliable quality from Enduro

In the Box

• 50 x Enduro BKC-0021 1/4 (0.25) Grade 5 Si3N4 Ceramic Balls