I mounted some 15x6" ex-MGF wheels on mine over winter, front 195, rear 205 section. I had some help & information from another UK owner who had fitted the same wheels to his S2, and he commented that there was a very slight rubbing at the front inner wheelarches on full lock.
So I made a couple of moldings to let into the bodywork on mine, but after mounting them there didn't seem to be any clearance problems moving from lock to lock, either on full droop or loaded with the car's weight. I don't know if the TC has different inner wheel arch design from the S2, but from what I've seen so far, no problems.
Brian