all aluminum 21 speed all white never ever to hardly rode perfect in every way not even a scratch on it folding pedals helps saves room when storing rear kickstand for saftey. women's or girls bike or a man.fast lite and easy handle bar shifting.full suspension.never had a flat. tires still new no squeaks no noises quick responsive.tool less seat and handle bar removable.no old lady seat perfect factory seat bike still smells new you won't be sorry keep it a year and you still get full return on your money. now for the person who contacted me.there will be no more email tag . leave a number even your friends number if trust issues and ill call you back showing my number and were talk get it. names John.