Yes, you can.
what is the diameter difference from a 205/65/16 vs. 225/60/16
no
No, a 205/65-16 is 1.18" too big in diameter. Your speedometer will read 57.3 at 60 mph. The vehicle will not handle or ride as it should.
no you cannot
yes its true
Sidewall height. 205 = width of the tire, 55 = percent of tire that is sidewall, R16 = rim size. Therefore, if you switch a tire to 205 60 R16, you will have a larger sidewall. Larger sidewalls can cause more flex, degrading the vehicles cornering capability.
i have a tire this size its 205/55/R16
Yes to the 205/50/r16 it will worl fine- no on the 205-55-r16 to tall and heavy
yes
No, that is a horrible swap that would cause your speedometer to read 65.33 at a true 60 mph. Your power, fuel mileage, and handling would also be effected. A decent swap to a 60 series tire would be 195/60-16 and even then your speedometer would read 62.97. Stick with the OEM size.
they are 205/60/r16