Our Gen2 TRS Plus Cassette now has 1 aluminum cogs and 10 steel cogs for dramatically increased strength and long-term durability. This makes it our first E*Spec rated cassette, and suitable for e-bike use.Impressive Eagle-besting range, updated shifting, a unique two-piece assembly for individual replaceability, and our exclusive 9t cog, deliver a winning combination of features for unbeatable value.Unbeatable range with our 9T cog, which allows for more range and less weight. Key Features: Freehub Mount: XDand XDRDrivers OnlyMaterial (1 Cogs) 7075 Aluminium, (10 Cogs) Steel for unbeatable durabilityRange 9-46T: 511Size 9-46T: 9,10,12,14,17,20,24,28,33,39,46 Weight 9-46T: 395gSpecial Note for HopeHub Owners: Please notify us if you will be installing the cassette on a HopeXD driver, as HopeXD drivers do not adhere to licensed XD specification and require an additional shim which we will include with your order.