<VV> Re: tire size/change was Bias Ply Tires

[James Davis]

Mercedes imported during the mid-60's used a 7.35 x 13 
Michelin  radial in the 'stop'  tread.  I had a set of then install 
in 1966 on my 65 Corsa as the 6.40 x 13 Michelin X's weren't up to 
the task of carrying a LM Corvair.  I still have one if you need a picture.
Jim Davis



  At 07:09 PM 2/19/2007, airvair wrote:
>Tim,
>
>I'd say you are pretty accurate in comparing the 185/80R-13 to a
>6.50-13. Not sure the accuracy of the use of 6.50's on '65's, but the
>speedo for both the '65's and the later cars is still 825rpm
>(revolutions per mile), which figures out to be 24.44" rolling diameter.
>Whether any factor-built speedo really registered that is another
>question.
>
>The specs DO say that early wagons as well as all '66-later cars use
>7.00-13's regardless. To my knowledge, no other car used that big a 13"
>tire. At the time, GM's policy was to use certain size rims for certain
>vehicle sizes, regardless of the engineering outcome. This meant that
>even full-size Chevys came with 14" rims. No doubt, the 7.00-13 was
>designed simply to comply with that edict, yet provide the load-carrying
>capacity that those so-specified Corvairs needed, without going to a 14"
>rim.
>
>Sure wish the late models had had a 14" rim upgrade option. :o(
>
>-Mark
>
>tim mahler wrote:
> >
> > Wasn't the change to 7.00-13 tires done for 1966?  the 65s still used the
> > 6.50-13 size. (according to the Corvair Decade, p 89)
> >
> > >From my early days on VV,  i remember asking about how GM handled the
> > California rules that required the Corvair headlights to be raised an inch.
> > 65 eas exempted,  but GM changed tire size and spring rates to raise the
> > late model an inch.
> >
> > the 185/80/13 is comparable to the 6.50-13  (some say the 175/80/13 iis the
> > similar to th 6.50-13 and the 185/80 is closer to the 7.00,  but I'm using
> > Bruce Schug's measurements from Oct, 2005)  Coker has 6.50-13 for $116 a
> > pop. vs the aftermarket, 185/80/13 radials that could be had for under $50.
> >
> > leaves the wagons, and late lates (66-69)  about 8.5% of all 
> corvairs built.
> > small market indeed.
> >
> > Any other cars use the 7.00-13 size besides Corvairs?
> >
> > tim mahler
> > knowledge is power
> >
> > ----- Original Message -----
> > From: "airvair" <airvair at richnet.net>
> > Sent: Sunday, February 18, 2007 5:45 PM
> > Subject: Re: <VV> Bias Ply Tires
> >
> > > I also wonder if we will EVER get a repop 7.00-13" tire for the late
> > > models and early wagons.
> >