I recently bought a Motobecane 300HT, brand new. My rear tire rubs on what I believe is called the chainstay (the lower bar that attaches the rear wheel). The rubbing is much more noticeable when climbing hills. When I flipped the bike upside down to investigate the problem, I noticed that my rear wheel wobbles slightly when pressure is applied from the side. The rubbing problem seems to be getting worse.
1) Can anyone help me fix this problem?
2) Did I buy a crappy bike?