Shimano tiagra hg500 10 speed road cassettehigh quality 10 speed cassette from the tiagra groupset features hyperglide sprockets have a computer designed tooth configuration with contoured shift gates resulting in a crisp smooth shift even under load sprockets are cut away and drilled to reduce weight without reducing rigidity nickel plated finish offers hard wearing resistance to corrosion corrosion resistant steel cassette lockring for 10 speed road hg chainsa 2 year warranty is offered wit