could be a lot of things, can you feel the 'squeel' in the steering wheel when you turn? could be a jacked up wheel hub, poorly attached tie-rod, wheel bearing, or just a brake pad thats worn unevenly... or about 5 other things
-Speed Demon- Matt Black 2000 Contour SE Sport (duratec/atx) got body mods? all show, better than stock go "I might be crazy, but I'm not stupid" speddmn.com