Try this site http://www.miata.net/garage/tirecalc.html
"kevin" <powershot80@gmaihttp://www.miata.net/garage/tirecalc.htmll.com>
wrote in message news:48ee1319$0$5472$9a566e8b@news.aliant.net...
> sorry about that 70. should be 17
> "kevin" <powershot80@gmail.com> wrote in message
> news:48ee10e0$0$5465$9a566e8b@news.aliant.net...
> >I have a 2008 honda accord. The tires size 225r-50/70.
> > I am buying winter tires. Can I put 215-r50-17?
> > thanks
> > kevin
>