What would adding bigger rear tires do to a car?

Specifically, a Mustang GT. What would bigger rear tires do for a car like this? Just regular tires but maybe a bit bigger and wider. Will anything change? I am not talking about drag tires, but I do know that drag tires will help improve drag times.|||It will add more traction and of course it will look good. Hope this helps!|||they will make it look retarded|||bigger well i will say this if you put a wider tire on your gt you will have more traction so less spining taking off. if the tire is taller you will take off alittle bit slower unless you change out your axle gear ratio. drag radial run good for track and street but not as good of traction on the street as a street radial. my old 04 mach 1 with 275/40 r 17 on a 17x9 inch rim would chrip the tires at the dragstrip in 4th gear but i also had some bolt ons and 410 gears|||Wider AND taller, or just wider? Taller will raise your overall gear ratio, give a little bit better mileage, but acceleration will suffer. Taller tires will also throw off your speedometer reading. Wider tires will increase your chances of hydroplaning in wet weather.





Sounds like a good idea . . . . .|||It will make your speedometer read slower than you are going|||Widder tires will help you take off better and give more control but can suck during the rain. The cars spedo might be off a little bit and you should get worse gas bc the tires weigh more and you have more tire touching the road so its more friction.|||They do make "cheater"slicks for the street but in the rain Driving a car with them can at times be SCARY!!!!!


I am talking sh@@ in your pants scary


and don't even think about snow


i was on the xway at about 70 mph in the rain the car spun 3 times


it was early on a sunday morn across 3 lanes luckily no cars near


ended up backwards in the 3rd lane|||Without knowing the year of your Mustang I couldn't "guesstimate" what type of tire change you could make without lousing-up your speedometer.





Here's what I would do: Go to tirerack.com and click in the year and model of your car. It will give the OEM tire size. Start opening up tires you're interested in and open the word Spec. under the picture of the tire. Another page will pop up with sizes and specifications. Let your eyes roll over to the far right in the column of your present tire size. You'll find the heading says: RPM in tire language which means revolutions per mile. The trick is you want to find a larger tire with a smaller cross section aspect ratio to keep the tire RPM's within 10 revolutions per mile as compared to your standard tire size.





If you call tirerack, and ask them to recommend an *up-size tire for your car they'll know exactly what you're talking about.





Keep in mind, if you intend to drive the car with wider tires year round they're terrible news whan there's snow and ice.





Take an old man's advice who's learned this the hard way 40 years ago with more horsepower than you'll ever drive, wide tires "eat it" in the snow.