I just bought this bike and would like to know how to adjust my brake pads so they do not rub against the rim on the front rim/tire? What exactly do I adjust? I did not get a manual with the bike. They did not do this when I first brought the bike home but after riding it about 30 miles they rub as the wheel turns. Is this normal to get some "runout" on your rims after riding for awhile? This is a Fuji Captiva 7 speed. Thank you.