Looking at changing up a few things with my track car setup 2nd half if this year and thinking about my wheel / tyre setup. Got an ED Civic currently running 15x8 wheels with 205/50 15 tyres, but seen a lot of people are switching to 17" wheels. I presume this is for the lower profile tyre, but don't know too much about the advantages / disadvantages.

Just looking for people's opinions & comparisons and wondering if I should stick to the 15's or switch over to a different size, either 16" or 17".