A friend of mine bought a bike from Target last summer... it fell apart, I.E. BROKE, I forget why or what. Anyway, he swaps it out for another, it broke, bought another, it broke, bought another, it broke too. Not only did they break, the usually had to be rebuilt, as who was assembling them didn't tighten down many of the bolts and such. Also, they were very prone to rust. These bikes were sold from the Target Store in Wilmington NC last year. My freind went through 5 bikes that broke and had to be returned. Some were replacements, others were different models/brands. Considering all he did was ride up and down the strip at Carolina beach, you would they would have lasted, as riding on concrete dosn't even come close to riding on a trail.
He gave up after 2 months worth of troubles, and went and got a real bike at a bike shop for about $350.
You may get a bike from Target for $100 bucks, it may look like a bike, it may ride like a bike, but don't expect it to LAST like most bikes do!
AKDUDE