You can install 235/50-17 or 215/60-17 and that is about the only sizes you should use.
225-60.16
NO, the rim sizes are different, you can NOT fit a 15" tire on a 16" rim.
The original equipment size was 225/75-16. The optional tire size is 245/70-16. The use of any other size will alter your speedometer and adversely effect mpg and handling. Stick with one of these sizes.
No, a 27.5 tube will not fit a 700c tire as they are different sizes.
The 2001 Beetle Turbo comes factory with two possible tire sizes. The sizes are 205/55-16 or 225/45-17. These are not interchangeable without changing the rims.
Not likely. If you need to fit the tire inside a wheel well it will probably not fit. The 225/70 is 4 inches in diameter bigger not to mention 2 inches wider.
No, a 26-inch tube will not fit a 700c tire as they are different sizes.
235/45/17 OR 215/55/17
Yes
31by 10.5
22 inch wheels with a 225/30/ZR22 tire
The standard manufacturer specification is P215/60R16. Other sizes may fit. Talk to a tire dealer about your options.