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

[airvair]

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.
>