I can't see how it would be ok? I would never consider doing it myself....
how can you no see how it would be ok??
5mm larger sidewall makes the overall circumferance 2.13% longer, meaning the larger tyre will turn ever so slightly slower than the smaller tyre.
so when the other 4 wheels are doing 30, the spare will be doing 29.37mph
being on the back its not going to be spinning the diff at all, and may affect the tracking ever so slightly, but as said, contact2s after christmas, this is just a temp measure due to bad timing.
it grinds my gears the way people just make comments stating things, without any justification what so ever, either give some DECENT input, or don't comment.