Hydra Classic Boost 6B rear $435.00 Excl. tax Out Of Stock - Please Call For Availability - Special Order Available Color: *BlackOrangeRedTurquoiseBlueGoldSilverHoles: *2832Driver/Axle: *XD/12x148(Boost)Shimano HG/12x148(Boost)Microspline/12x148(Boost)Add to cartLogin for wishlistDescriptionShareHole Count 28 | 32 Weight 286g Industry Nine Classic hubs are the heart of your wheelset, everything revolves around them, literally. Every Classic mountain hub is made start to finish in our Asheville, NC machine shop. From turning and milling bar Facebook Tweet WhatsappAdd to comparison list