A very durable MTB E-Bike - DH- Enduro disc rear hub IS-6Bolt disc mount, AL7075 CNC crafted with double-sealed bearings and high precision low friction Japanese bearings. A very strong 15mm rear hub axle and aluminum cassette body, extra durable freehub body Free Glide system instantaneous engagement spins freely and silently. This hub is ready to be built and abused.