Weldtite bike/cycle caged 1/4 ball bearings & grease are specifically designed for the rear wheel hub of various types of bikes, including cross bikes, foldable bikes, cruisers/lowriders, hybrids, racing bikes, mountain bikes, tandems, and town bikes. This part ensures smooth and efficient wheel movement, allowing for a more comfortable and stable ride. The high-quality bearings and grease included in the product provide durability and reliability, making them a reliable choice for cyclists looking to maintain the performance of their rear wheel.