Absolutely correct about the impact of aspect ratio. The article actually said
85 to 95 percent for competition applications and very aggressively-driven, high
performance street applications.
Gordon Glasgow
Renton, WA
> -----Original Message-----
> From: datsunmike [mailto:datsunmike@nyc.rr.com]
> Sent: Monday, October 22, 2001 3:48 AM
> To: Gordon Glasgow; datsun-roadsters@autox.team.net
> Subject: Re: FW: Original Tire height
>
>
> 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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