Asama Raven 21 speeds mountain bicycle, alloy tires with great tires and stainless steel spokes, aluminum alloy structure. 19 1/2 inch frame that agrees with for 5'4 to 5 '10 cyclist, Shimano Decore DX derailleurs and index shifters. fast launches at the seat post and both wheels. the bike did a service lately and prepared to ride away. company on the cost.