2004 crv tire question

I am about to buy a front wheel drive crv with 15x6" steel wheels and 205/70/15 tires. Has any one ever put bigger tires on the factory wheels? How big can I go, I am thinking of 235/70/15`s
Any ideas or advice would be appreciated. Thanks, Al Colby

For proper plus sizing info - check www.tirerack.com (http://www.tirerack.com) or www.whalentire.com (http://www.whalentire.com)