and air pressure could cause a huge difference too!

 

yup. simple thing like normal maintainence

 

be VERY CAREFUL with those definity tires. i had a sidewall nearly blow out. had it bubble out. now there is a flat spot on both front tires. and pepboys said it wasnt their responsibility to cover the 2 flat spots lol under their warrenty. but they will pro rate the tires

 

Thanks, a bubble on the sidewall is most usually due to a manufacturing issue...unless of course you aim for really big pot holes when you're driving!! LOL I'll keep an eye out for that...

But tires developing flatspots (IIRC) are due to several reasons, but most commonly overloading, inadequate tire pressure and letting the vehicle sit for long periods of time....

 

I don't have as much expertise as the guys around here, but I've read that you should replace your tires with the same size that was on it initially otherwise, like others have said, you will have to recalibrate everything or end up with many minor issues over time.

 

The rule of thumb is that a tire within 3% overall circumference is generally OK. Going bigger or smaller can cause certain issues to arise however vehicles are generally engineered sufficiently well that they can handle a much larger tire than the factory tire. Also it is pretty easy to get your pinion factor reset by either the stealership or by using any number of after market calibration tools (hypertech or superchips both make them).