benspeed,
No. But I had the Hooiser 245/50 x 15s on the rear of my 914/6 GT-3 car (fender flairs and factory fuchs wheels and ruined the inside sidewall on the trailing arms in two laps.
These tires are like the Goodyear race tires with a lot of cantilever, hence they require a lot off side clearance.
I have a RX-7 Gen II ITS car and I don't think a Hoosier 245/50 will fit without fenderwork. I looked at it tonight.
It will be interesting to see if anyone oput there has tried this on a RX-7, but I would like to know what wheel offsets they used.
Good luck.
Bill Umstead