Gordon,
I also think the aspect ratio of the tire plays a big part too and the 65
series can take a little more abuse when it comes to wheel width. Those 40
series tires don't have much of a side wall and they're really stiff.
Just a thought.
Mike
----- Original Message -----
From: "Gordon Glasgow" <gsglasgow@home.com>
To: <datsun-roadsters@autox.team.net>
Sent: Sunday, October 21, 2001 6:01 PM
Subject: RE: FW: Original Tire height
> That's a good article (page 152) and is worth reading. For a 185-width
tire,
> that rule gives a rim width of 6.19".
>
> John Rastetter, director of product information services for The Tire Rack
wrote
> the article in answer to a question about running a 245/40-17 Hoosier
R3S03 tire
> on an 8.0" rim, which is narrower than what Hoosier lists for the tire.
However,
> other tire manufacturers consider that rim width to be acceptable for that
size.
> It turns out that the Hoosier is wider than other tires of the "same" size
(this
> is something I have observed before about Hoosiers).
>
> One point that he makes is worth quoting here, since a lot of people have
put
> wide tires on narrow rims:
>
> "When you "squeeze" the P245/40-17 sized R3S03 tire onto an 8.0-inch wide
wheel,
> you reduce its section width and place additional stresses on the tire's
> shoulder and tread areas. These stresses can reduce response, stability,
> traction and wear, as well as increase the possibility of circumferential
> cracking appearing at the edge of the tread."
>
> Gordon Glasgow
> Renton, WA
>
>
> > -----Original Message-----
> > From: datsunmike [mailto:datsunmike@nyc.rr.com]
> > Sent: Sunday, October 21, 2001 5:45 AM
> > To: Gordon Glasgow; datsun-roadsters@autox.team.net
> > Subject: Re: FW: Original Tire height
> >
> >
> > This months Grassroots has an article about rim v. tire width. They say
the
> > rim should ideally be 85% of the tires width for maximum performance.
> >
> > Mike
>
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