Your tires are 30.6" according to translation of the numbers. You shouldn't have any problem at all running stock rims with 30" tires. If your tire does manage to hit your sway bar, the bar is round and can not "slice" your tire. My '02 TJ came from the factory with 30s, and I didn't hit at all even when disconnected.
And those do look like soft 8's. Inspect them well, I don't like the looks of the rust at the hub.