tyre mashing?!?!?!?
195/50's will be fine, from memory the rewinds are a zero offset 7 inch rim, so at most you will have to roll your guards (fold the lip under, no big deal)
depends what height you run your car at really
get 195/50's on them, fit them and see what happens, it won't be hard to solve any rubbing issues as they should only be slight.
