Hello all,

wondering if someone can help me out.

I've got a focus Chic special edition, currently on its stock alloy rims with standard 195/60/15 tyres.

However, I've just taken delivery of a set of 17 inch MP3 alloys, won off ebay. They are ok and just require a refurb, which i'm going to get done this weekend.

Now then the tyres fitted to the MP3 alloys are luckilly new, but they are 215/40/17.

will I be OK keeping the 215/40/17 tyres on, or should you strictly have 215/45/17 tyres on. The Focus St170 & MP3 have 215/45/17 tyres fitted as standard, not 215/40/17.

Am I getting my keks in a twist over nothing, will it be OK to stick with the 40 profile tyre, or should I get new tyres with the 45 ratio?

Thanks in advance

Andy