Most sedans and lift back type vehicles, and some SUVs these days are sold
new with "donut" spares.  The recommendation for those is don't exceed 50
mph and don't drive over 50 miles.  There is a much greater size
differential for those than for the tires you mentioned.

On Sat, Jun 10, 2017 at 10:35 AM, BenT <syncro@gmail.com> wrote:

> You should be fine with a smaller spare in a 2wd.
>
> I would to do that in a Syncro or any other AWD vehicle though.
>
>
> BenT
> sent from my electronic leash
>
> > On Jun 10, 2017, at 10:31 AM, Mark Hersh <cmwolfsburg@GMAIL.COM> wrote:
> >
> > We put 15" wheels on our 86 weekender (2.2L NW Connecting Rod WBX and
> stock
> > auto tranny) almost four years ago but kept the 14" spare. At the time, I
> > didn't think too much about the size difference (just made sure I had
> > something that held air). OK, so we had a blowout on one of our 205/70 15
> > tires (the second set on those rims) and I had to mount the spare (195/75
> > 14) and get home 100 miles. Upon closer examination, the spare isn't in
> > very good shape although it got us home.
> >
> > I asked a regional FB group whether anyone had a decent XL or load range
> C
> > 14" tire I could mount as a spare.
> >
> > Someone said I risk catastrophic transmission damage running a tire of a
> > different height.
> >
> > Do folks here hold the same thought?
> >
> > Should I just go with a 15" spare and modify my clamshell holder if
> needed?
> >
> > Thanks
> >
> > Mark
> >
> > --
> > 86 Campmobile Six-Seater "Monty"
> >
> > Black dogs are euthanized at a greater rate than other-colored dogs,
> > regardless of temperament.  Learn about Black Dog Syndrome at
> > http://www.blackpearldogs.com/  Learn about black dogs in a Vanagon at
> > http://www.pbase.com/mhersh/image/108220533
>