The ball bearing with dimensions of 30x42x7 mm from the brand Hope is a high-quality accessory for shifting and drivetrain. Made from robust stainless steel, it offers excellent durability and corrosion resistance, making it ideal for use in bottom brackets. This product is specifically designed for use in BSA 30 and Pressfit 30 bottom brackets, ensuring reliable performance. With a delivery of one ball bearing, it is a practical solution for the maintenance and replacement of components in bicycle drivetrains. The universal size and metallic material group make it a versatile accessory that can be used in various applications. The precise measurements of 30 mm inner diameter, 42 mm outer diameter, and 7 mm width ensure a perfect fit in existing systems. This ball bearing is an essential component for anyone who values quality and longevity in their bicycle accessories.