This Particular set has a strong aluminum rim with 25mm interior width.  Each 29" wheel has 32 spokes with Sapim race double butted spokes and brass nipples.  It is a very durable build and will hold up to agressive trail riding.  Enduro bearings in the hubs, which have Boost spacing, 12x148 and 15x110, and 6 bolt disc rotor mounts.  This set comes with an XD driver installed, but can be switched to shimano 11 speed upon request.  The finish is called Black Rose, by Prismatic powders.  It is a textured finished that lookes like aged hammered metal.