I need to know what size of tire a chevy caviler uses

they will be about an inch taller

Your original size is 195 70R/14. The sport model has 205 55R/16. You are going 10mm wider or 5mm deeper to the inside, but the profile is higher by 5%. I would say they should fit fine.
BUT. I am not an expert in tires. You need to check this out with a Chevy dealer or reputable tire shop.
Using tires that are not the recommended size and/or rating can adversely affect vehicle handling, performance and safety.
J
Thanks for using FixYa - a 4 THUMBS rating and POSITIVE TESTIMONIAL is really appreciated for the FREE answering of your question.

On every vehicle sold in the US, there is a sticker - commonly called the tire placard - that lists the original tire size and the proper pressure for that size. The placard is usually located on a doorpost or in the glove box - but sometimes it is located in the trunk or on the fuel filler door. You can find the information on the Owner's Manual.
If the placard is removed, and you do not have the Manual, you can call the Chevrolet dealer, have the VIN# ready, and they will help you. If you cannot get access to Chevy dealer, then go to Internet @:
http://www.tirerack.com/index_w.jsp
Enter the Vehicle, make and Year. Select tires, and you will find the size of the tire for your car.

prob a short in the wire

Something is bent... have a front end shop check it out, replace any bent parts and re align the front end.

one size 4 7/8

From a legal stanpoint? Do you have inspections that require stock equipment? Might want to be careful there.--other than that from a mechanical standpoint the outside diameter of the tire needs to be real close and honestly it sure sounds like youd be there. Maybe about ten milimeters off in total--but that would represent about 3 mile per hour difference in speedometer reading. not bad. Hope I helped. Thanks

goggle mercury cougar owners manual is very long but its worth it. Oh the size tire is 215/555R16 there high profermance and low profile tires pep boys have them for $99 bucks a piece

open the drivers door... on the pillar inside the door is a sticker with the recommended tire sizes.

if the sticker is not there look for it on the inside of your glove box.

Robert

Yes the original tire size for the Chevy Impala/Caprice classic is 225-70-15 anymore questions let me know, and if you could please rate me i would greatly appreciate it.

Thanks,
Steve