Frame: alloy,26'MTB frame, TIG weld Fork: Steel, TIG weld, 26' fork,28.6*220 Handlebar: down hill bar,alloy Brake Sets: F/R: steel, disc brake Saddle vinyl cover . Crank Sets: shimano , three pcs black,w/AL crank FC-TX71,170mm ,1/2*3/32 Rim: 26*1.95 , double wall rim, alloy ,14G*24H Front & rear Hub: F/R: W/ quick release ,loose ball, disc brake Tire: KENDA 26*1.95 ,rubber black F/R Derailleur Shimano F/R derailleur Gear Sets: Shimano freelwheel 21speed