The Magneto Cassette hub features a magnetic system engage using the force of two magnets that allows the ratchet ring to engage. The magnetic field provides an even repelling force which makes the ratchet to work completely straight and are created in a way that reduces friction compared to the use of springs.The Neomidium magnets Fly uses maintain the magnetic field pretty much forever, as well. These properties creates the fastest, most reliable and durable system possible. Not to mention, a pretty unique and powerful noise...

Specs:

Hub Shell: 7075-T6 Aluminum
Bearings: Oversized Sealed
Axle: Heat Treated Chromoly
Weight: 475g