I use Dunlop z3's 195 50 front 205 50 rear purchased from tire rack. Flevas should be available at 185/55 front which is OEM. Do yourself a favor and go with Fleva.
FWIW, I had 205 50 tires (square Conti) put on a set of stocks. It was staggered wheels though not double (15in only). Was fine imo.That is a wide set for OEM rims. If using those tires sizes I would go with wider rims. Personally I like OEM tire sizes or as close as I can get to them for Street driving.
I don't get that as I've been square pretty much my entire ownership (since 2016), never had a problem, and I daily it on a 40 mi round trip highway commute 5 days a week. I'm less defending square and more complaining the complete shit show lack of selection in general for wheels & tires for this car... The only exception is if you're track or auto x (200 tw tires) otherwise shit out of luck.I am not a fan of a square setup for a street spider. The owner can do whatever he pleases as long as it's in a different state away from me.