this is ridiculous. you should be on a 22.5" +/- i size (i.e. 20 or 25"). i'm 5'9 and used to ride a 17.5". when i purchased a 20" - THEN i realized what i was missing. you don't realize what you're missing. changing grips or stems or whatever are mere compromises - you should get the correct size from the start. proportions vary but a tall 6'2 guy has no business being on a 17.5"