great bike for the money, but changing gears is way more complicated than it should be in the year 2012! there are two thumb gears which control the 15 possible gear combinations, but when you shift gears if you push them too much or too little, the chain rubs on the guide and its annoying. there are also no setting except high and low on the thumb controls, so you don't know how much to push them in order to switch to a different gear ratio.
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