I bought tire for my xg-300 (p215-60-r15) is it gonna fit?...The original size is(p205-65-r15) or it's gonna tuch inside the fender?... pat.

yes
you have to fit the same size tires on the same axle
so if you want to fit 195 -55-r15 on a steer wheel you must fit one on the other steer wheel as well

195/55 R15 is the normal size. The number 195 is the width in mm. The number after the slash is the aspect ratio. That means the side wall of the tire is 55 percent of 195. The R means radial and the 15 is the rim size. With that in mind, the 205 tires are going to be 140 mm sidewall. The 195 has a sidewall of 95 mm. I don't believe you can because the tire will hit the inside of the fender well.

You can but you will most likely experience bottoming out on the rear of your car and also hard steering will cause the tires to rub on the inner fenders. It will also slow your speedometer down by 5 mph.

No, not well. The rolling radius is bigger and will make your speedo read 5.5% slower than you are really going.

A 215/55 R16 is within a 1% match (0.7%) but will give a harsh ride. A 215/60 R15 will make your speedo read 2.5% slower than actual, not too bad, and it will ride better.

What fits you car is on the white label inside the door
on the A or B pillar.

A tire store will have a listing also

Your tires are P185/65 R15 (CE) 195/65 R15 (S, LE)

P235/75R15 15" X 7" wheels 5 lug

Owners manual has the answer. Also on either the door column or inside the fuel door should be a list of original and options tire sizes. Look at the present tires. They are all marked as to their rim size, and dimensions. Probably LT235/75 R15 if they are original now.

Even though you should always have a matched set, the size difference is about 1.33% smaller or around an inch and a half, total diameter. Just keep that tire in the rear so the drive wheels are the same size and you should be fine.

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