I was on my way into work the other day as I was rolling through the gate. This guy Marcus looked down at my right front tire and asked if I knew I had a screw in the tire. Well, no I didn't! The next day, I took it to Tire Kingdom. The dude took it back and after about 5 minutes walked back up front and said he can't patch my tire. He said the screw was in the sidewall. Sidewall? Really? He could have a new tire there in 2 hours and that would be $308 with mounting thrown in for free! I knew my tires were expensive but 308? He said that the tire is still holding air so I kindly declined having it replaced. So, my question is, How necessary is replacing that tire? I know that you should replace in pairs so I'm looking at over $600. Is this dangerous driving this way? I drive over 80 mph on the Interstate. I'd hate to have a blowout.