Shimano sora rs300 front hubthe shimano sora rs300 front hub is incredible value for money and is extremely durable seals help to prevent water and dirt ingress for incredible performance in all weather conditions features like those at the top of the range sora road hubs feature labyrinth and contact seals to prevent the ingress of corrosion causing dirt and water internal grease sleeve increases durability and reduces service intervals the hub uses angular contact bearings designed to cradl