The sram xx1 eagle groupset black 1050 is a brand new groupset which represents srams newest 1x drivetrain technologies not only is it lighter and tougher but it is also quieter more durable and more precise making it engineered for greater performance it features the brand new x dome eagle cassette which is a 12 speed 1050 cassette that offers an optimal 500 percent gear range at a considerably lighter weight than 2x systems it carries with it the x dome architecture which independ