Hi , I am Latha. I wanted to buy a bicycle for regular usage . I am confused about height charts . All most all charts suggesting 48 to 50 frame size .On bicycles its mentioning that 22 "/ 24" bicycle . If I convert 48 cm=18 inch approximately.As far as I know it is kids cycle. My question is In chart they mentioned frame size .Is it same as mentioned on bicycles? What should I buy for myself?