ForThose of youThat would likeThe durability,andThe ultimate in axle convertibility without a proprietary spokesystem,The classic hub is for you. I9Tried a lot of different bearingsTo find somethingTo hold upTo a wide variety of conditions, finally deciding on ABEC 5 grade Japanese bearingsdueToTheir superior seals and durability. Easily convertsTo 15mm, 20mm, 24mm and 25mm axle with addition kit (sold separately) Machined and anodized 7075 hub shell 6 bolt rotor flange ABEC 5 grade Japanese bea