How wide?

[Esprit10]

How wide of a tire can you put in the rear without doing any modifications? Thx

[Enright]

If it's not broke, don't fix it!
In other words, stick with standard - you won't do any better.

[tigerdog]

You can go from a 205/45-16 to 215/45-16 without rubbing; this size is fairly popular for autocrossing certain Hondas, so there is a good variety of inexpensive performance-oriented tires available in the US. I don't drive much in rain, so I use Kumho Ecsta XS. They have more grip than I'm willing or able to use, even with Smaug's modified powertrain. Going wider probably won't help and might even hurt handling.