Shadow Symbol Cassette Hub - LHDShadow's Symbol Cassette is the result of an effort to create the most reliable, refined, and well functioning cassette hub possible. It's built with a 6061 aluminium hub shell that is paired with a 14mm hollow chromoly axle with a 6mm broach, sealed bearing throughout keep the Symbol rolling smooth. With the popularity of plastic hub guards, they've also decided to include a replaceable non drive side plastic hub guard to boost the value and