The Tiagra RS400 Front Hub from Shimano is a reliable front hub for road cyclists. Like the top-of-the-range front hubs, RS400 Tiagra level road hubs feature a labyrinth & contact seals to prevent the ingress of corrosion-causing dirt & water; this, along with the internal grease sleeve both increase durability & reduce service intervals, making sure you roll smother for longer. The hub also uses angular contact bearings designed to cradle the balls giving both radial & lateral support for superior strength & durability in real world riding conditions. They also offer precision bearing adjustment & easy maintenance. Available in Silver with 32 or 36 hole drillings.