Both of my front tires on the inside are badly worn and have wires showing around the whole inner side. I noticed this problem start to show approximately 6 months ago and had the front tires replaced with decent used tires and I had a front end alignment at a reputable mechanics shop. Today I was doing my 6k mile tire rotation and noticed the front tires were horribly worn and wires were exposed on both of them all the way around on the inner side. I also checked the front tires for any play while one was jacked up and didn't notice any. Any ideas on what to check? I don't want to get a set of new tires and the insides are worn in a year.