widest tire that will go on stock 16" rims

[GSTurbo1]

Ok so I have been looking around everywhere trying to find the widest measurement tire that will fit on my stock 2g gs fivespoke rims

I have 205/55R16 on it now and these things are so skinny I want something with a lot more beef.

The car is pretty much slammed on these tires so I can't really go any bigger just need to know what the widest ratio I can slap on would be.

 

[LxiMax]

I think the largest Plus Zero size is a 225/50/16.

 

[GSTurbo1]

ok thanks man