Yes they can
No, that is not an acceptable substitute. There would be 10.2% too big, difference in overall diameter. You should never go over 3%. http://www.1010tires.com/Tools/Tire-Size-Calculator/225-40R18/245-50R18/225-50R18
Doubtful, the 225/65 tires are narrower and shorter.
Rotate tires 2 front 225 and 2 back 245
A 225 75R 16 tire will fit on a 245 75R 16 rim. The only difference between the tires is the height of the sidewall.
If the recommended size is 225/70-16 then no this would not be a good substitute.
245 and 225 are the first numbers in a tires measurement and they simply tell you how wide the tire is in mm. So a 245 is wider then a 225. But which is taller? This depends on the second number which would be something like 245/70 or 245/75 and the same goes for the 225/70 or 225/75 and there are many different combinations. This second number tells you in a percentage what the sidewall height is compared to the width which is the first number. So for a 245/70 tire it would be 70% of 245 = sidewall height, in this case that would be 171.5mm and a 245/75 would be 75% of 245 = 183.75mm so in this combination the 245/75 is taller than a 245/70. So if you had a 245/60 the sidewall height would be 60% of 245 =147mm and if you had a 225/75 the sidewall height would be 75% of 225 =168.75 which would make it taller then the 245, so as you can see it is the second number which gives you the calculation needed in order to get the height. Of course the last number in tire dimensions is the rim size such as 245/70/16 would mean it is for a 16 inch rim and this will affect overall height of the tire compared to a 245/70/15 which would go on a 15 inch rim.
That is an acceptable swap but a much better choice would be 245/60-17 which is an excellent swap.
215/75-15 225/70-15 235/65-15 245/60-15 265/50-15 Check for clearance issues on the 65, 60, & 50 series tires.
The factory size tires for the M coupe are, 225/45ZR17 in the front and 245/40ZR17 in the rear. Obviously you can stray from these somewhat, but you will lose performance as the M coupe is a performance vehicle.
Stock I think they're 15" or 16", 225. Maybe 245 in the rear for the TT. Right now I have 18", 245 on the front and 275 on the rear. Be careful to get the right offset for your rims and aspect ratio for your tires if you go that direction.
Yes that's reasonable
yes