thi thread isnt too old..
id say if you are over 6 foot you should venture 21 and higher and if youre under 6 foot try to go smaller, but i agree its up to you, and you want wanna have back cramp or something after a few hours of riding.. that happened when i rode a scooter lol.
its actually pretty old, its just been brought back more than several times
theres a bike shop by me and the guy goes on rant about kids that ride 21 cuase he doesnt believe in them, hes 6 foot and rides 20.5, which i personoly could never do
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