The X0 Eagle Transmission cassette (type T) is one of the main reasons why Eagle Transmission offers the best inboard and outboard shifting performance under load. Designed as integrated and interdependent drivetrain components, the X0 Eagle transmission cassette and derailleur are in direct contact, ensuring perfect alignment on every bike. In addition to the exclusive and outstanding Dark Polar finish and chemical nickel plating for incredible corrosion and wear resistance, its full X-Sync design literally means the harder you pedal, the better the shift. Its strength is further proven by its full approval for use in E-MTB. It was built for a 55 mm chainline for even greater durability and precision thanks to gentler chain angles across the entire range, from low to high. From its wide 520% gear range, The 52-tooth gear drops with improved gear progression with 44 and 38-tooth gears in the lower range (compared to the 10-52 tooth Eagle transmission cassette). What else? It has a clearly marked installation gear, making installation simple and foolproof.