- Package Includes: 12 high-quality bicycle crank bearings, each featuring a ball size of 1/5 inch (5mm) with 7 balls, fulfilling all your bicycle parts replacement needs. - Dimensions: - Outer Diameter: 38 mm (1.5 inches) - Inner Diameter: 24 mm (0.9 inches) - Ball Diameter: 8 mm (0.3 inches) Please verify sizes prior to ordering to ensure compatibility. - Durable Construction: Crafted from premium metal, these bottom bracket bearings are designed to resist rust and wear. Their robust construction guarantees a long service life, ensuring reliable performance for every ride. - Essential Functionality: Specifically engineered to replace bearings in your bike's axle and wheel frame. Regular inspection and replacement of bearings are crucial for maintaining optimal bike performance, whether for leisurely rides or competitive racing. - Practical Applications: 1. Ideal for routine maintenance before embarking on long-distance cycling trips to prevent mechanical failures. 2. Perfect for bike enthusiasts preparing for races, ensuring smooth and efficient performance on the track. 3. Suitable for DIY bike repairs, allowing you to upgrade or replace worn-out components effectively. Choose these bicycle crank bearings for a dependable upgrade to your bike's performance and longevity.