I can't answer your question directly because I've got a V2. But... you have to maintain the same front/rear tire diameter ratio or you will have an effect on TC. If the rear tires have a smaller diameter, TC will kick on sooner. If they have a larger diameter, it'll kick in later. I've used this method to "tune" TC on my GM cars to be more to my liking (I want a little more wheelspin before TC engages so I oversize the rear tire diameter a bit).
As for the tires, the question you want to ask is "how wide is the rim?". The tire will have a "nominal" and a upper and lower limit for wheel width. If your rims don't violate those limits, you can mount the tire without fear of rubbing (as long as you're not increasing the diameter much) or of the tire coming off the rim. But if the tire width is at the upper limit for your wheel size, handling will be negatively affected (the car will "squirm" because the tire geometry will allow more sidewall flex). Good tire geometry is slightly wider where the tire meets the rim than at the tread.
