175 or even 185 would be fine as long as you stick to 14inch.
Go for closest possible size, avoid 185 70.
Make sure you get fresh tyre, 2015 end or 2016 start. I had best experience with Yokohama, wanli, Michelin and falken.
You can compare both sizes on online tyre calculator. Also check inner side of door pillar for more sizes recommend by Mitsubishi.