Hey guys, just came across this site and had a quick question. I'm going to head to Dick's Sporting Goods tomorrow and I was wondering, what should I be looking for in a bike? I haven't had a bike for years and I'm leaning toward a Mountain Bike. It'll be mainly used to go to the grocery store up the street and other short-distance things (Maybe half of the distance to the grocery store has a sidewalk, but its less than a mile away, so I'll live), but potentially to and from work once in a while (14-15 miles each way). I'm looking to spend $300 although a little more or even less would be fine. I was looking at the Mongoose Tech 4, but apparently Dick's shows it online but its not sold in the brick-and-mortar stores. I know I could probably get a lower price at a bike shop but I don't know of any near me.

Thanks.