I recently purchased a 2009 Giant Rincon and ridden several times. A couple of weeks ago I noticed my front tire was rubbing against the disc brake. I took it to the LBS and they said the brake line got stretched. I took it home and tried it out (rode it down the driveway and everything appeared fine). Today I was getting my bike to go riding and I noticied the same problem as before. The front wheel rubs the disc brake when it is spinning. The problem isn't major, but the wheel definitely loses some momentum. Is this an easy fix? Thanks in advance.