If your cx5 are all wheel drive suggest remain the rim size since all alloy rims the bigger the heavier and put a lot stress for your rear differential even your not all wheel drive and fw also not suggest , unless you bought the rim 19 inch weight like 15 inch then you can consider but too much hole for Malaysia road that light weight rim will bang so easily , so never trust any experience or non experience tyre center , remain factory default always a good choice

All tyre for me same after 2 year on road usage even good conditions will start produce noisy and not soft as new , check the new tyre manufacturer date before assembling