about tire size

Friends,
A friend owes me .. I said he was going to buy 2 winter tires, buy 4 get 2, I agreed. However, his vehicle Polo and tire sizes 175/70/14; mine is 175/65/14 .. There are winter petlas on Hepsiburada.com 175/65/14 (Petlas 175/65 R 14 TL W601 T * Winter Tire Production Date: 2013; 103.13 TL including VAT).
The friend has seen this and says let me get it. It fits for me but does it bother her size naturally we will attach it to the front tires, but it will have a cheek difference behind
http://www.lastiknet.com/icerik.asp?inf=25 seems to be a problem according to this site ..

just putting it forward is a big mistake. wear four or not at all

There is a sidewall difference, but there is a 17 mm diameter difference, that is approximately 2 cm smaller tire. Each turn of the tire is 5 cm shorter and the speed of the vehicle is 90, for example, while its km is 92-93. Your friend could be in the vehicle 185/65 R14 tire. Of course these are my amateur accounts and opinions. Those who do the tire business know better.

I also give CVP with straight logic. In my logic, I have not heard that using the sidewalls ** / 45 / ** backs ** / 55 / ** sidewall width is not a problem to give back comfort. I do not know what happens on the contrary. I can say that the width of the cheek is related to comfort and there is no problem.

cheek width is not a measure of the ratio of the sole.