The original wheel/ tire size is 205/55/16. Could the size be changed to 225/50/17? Should it fit? Would it be better for performance? And what if there are many or big road holes should the wheels be damaged easier?

Tire size 225-55-17 is too large. The prescibed tire size for 17 Inch wheels is 215/50/17.

225-50-17 tires will rub and will also affect performance in a negative way because of the increased tire width and the larger diameter/circumference.

Sorry i meant 225/45/17. Should it be right?

33 minutes ago, Bol said:

225

As already said by Wilco, the tyre width is too wide. The maximum tyre width allowed is 215.

 

Found this:

(1st Original)

Rim size (in): 16 Alternate tire size: 205/55 R 16 Total wheel diameter (mm / in): 632 / 24.9 Percentage diameter difference to the original (%): 0 Rim size (in): 17 Alternate tire size: 205/50 R 17 Total wheel diameter (mm / in): 637 / 25.1 Percentage diameter difference to the original (%): 0.8 Rim size (in): 17 Alternate tire size: 215/45 R 17 Total wheel diameter (mm / in): 625 / 24.6 Percentage diameter difference to the original (%): -1.1 Rim size (in): 17 Alternate tire size: 225/45 R 17 Total wheel diameter (mm / in): 634 / 25 Percentage diameter difference to the original (%): 0.3   Source: https://www.automobile-catalog.com/tire/2017/2082425/ford_focus_1_0_ecoboost_125.html

Tire size 225-45-17 fits just fine.

I use this tire size during winter without any problems.

225-45-17 has a smaller diameter/circumference than tire size 215-50-17.  This is no problem as long as the programmed tire size is changed using a suitable diagnostic sytem.

Now i use 205/22/16 (from beginning). So you say 225/45/17 is fine? What about the price?Are those tires too expensive? What if the road is not good (holes etc), shall the wheel be damaged easier than 16'?

5 hours ago, JW1982 said:

Tire size 225-45-17 fits just fine.

I use this tire size during winter without any problems.

225-45-17 has a smaller diameter/circumference than tire size 215-50-17.  This is no problem as long as the programmed tire size is changed using a suitable diagnostic sytem.

Will that size be better for performance or will be worse? since it is bigger.

Changed them, i will report after they will be tested.

The result is very good. The car is more stable, it turns better and easier. Perfomance seems to be the same.