What kinda of riding are you going to be doing?
I have a Specialized Hardrock, which is basically an entry level bike for the dirt. It works ok for light trail riding. But I have already out ridden the fork and brakes. I paid close to $400 brand new.
At $250, I would look for used ones. A new $250 bike is not meant for the mountains. And youre not getting anything light with that kinda money.
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