s13 wheels need help

[capwred]

i was wanting to get some new wheels andi found that 5zigen made 17x9 with a +20 offset.my ? is would this fit a s13 car?theres no tire shop around here that has any wheels close to that offset to try and see.and i have done some research on it but not much luck.so if theres anyone out there thats running something like this are that knows whats the most offset you can run on a s13 rear please let me know.i want to order this rims this week.