The width, by 10 mm
One size difference would hardly be noticeable to the average driver under normal conditions.
I doubt it as there is 2" difference in diameter.
Yes it can.
If they have the identical aspect ratio and wheel diameter as comparing a 215/70-15 to a 205/70-15 the 215 tire will be .56" taller.
No, it will not.
yes. anytime. makes 1 cm difference in with of the tire.
The only difference is that 215 tires are taller. The first number in the name (215) indicates the tire sidewall height, the second part (55) is the tire tread width, the third part (r) shows that the tire is a radial tire, and the fourth part (16) indicates the rim size.
Yes
yes
NO, absolutely not. Never, ever, mix tire sizes on the same axle. You could put a set of 215 on the front and then a set of 205 on the rear but not a 205 & 215 on the same axle. Tires on each axle must be the exact same size.
The 215/55-16 tire is 3.24% (.85") smaller in overall diameter than the 215/60-16 tire. It is never advisable to go over 3% difference. Stick with the OEM size as recommended by the manufacture of your car.
205/65/15 or 215/65/15