[DeTomaso] Re 17 tire scarce?

[Mark McWhinney]

I am running a 305 (12.0 inch) on a "10 inch" Campy which one inch on either
side minus whatever the flange is.  It has as much overhang as I would like
to have.  On the other hand, I have seen the 305 on an 8 inch Campy on the
track.  It looked odd, but the world did not come to an end.


-----Original Message-----
From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
Behalf Of Douglas Kelm
Sent: Friday, June 08, 2007 8:44 PM
To: Mark McWhinney; mc121639 at teradata-ncr.com; detomaso at realbig.com
Subject: Re: [DeTomaso] Re 17 tire scarce?

Careful with your measurements, Mark. An "11 inch" rim is actually closer to
12" wide. Rim measurements are denoted as the bead width, inside to inside
of the rim flange. Typically, rim flanges are 3/8 to 1/2 in. thick, yielding
an actual rim width 3/4 to 1 in. more than the nominal (stated) rim width.
So the overhangs you quote are a bit on the large side (the overhang of a
335 tire on an 11" rim, assuming a flange thickness of 1/2", is .6"). Also
of major consideration is the overall diameter of the wheel/tire (directly
related to the section width and aspect ratio), which will adversely affect
your speedometer reading if it differs greatly from stock tire diameters.

Disclosure: Running 335/35 17 on 11" rims in the rear.

Doug Kelm


----- Original Message ----- 
From: "Mark McWhinney" <msm at portata.com>
To: <mc121639 at teradata-ncr.com>; <detomaso at realbig.com>
Sent: Friday, June 08, 2007 1:50 PM
Subject: Re: [DeTomaso] Re 17 tire scarce?


> 315 = 12.4 inches
> 335 = 13.2 inches
>
> Assuming you have an 11 inch rim, you would have an 0.7 inch overhang with
> the 315 and an 1.1 inch overhang with the 335.  Either one works, though I
> think that 335 is pushing the limit and certainly does not help the car's
> under steer.
>
> -----Original Message-----
> From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com]
On
> Behalf Of mc121639 at teradata-ncr.com
> Sent: Friday, June 08, 2007 11:21 AM
> To: detomaso at realbig.com
> Subject: [DeTomaso] Re 17 tire scarce?
>
> Joel said:
> > Imagine my surprise when attempting to buy tires for my new Wilkinson
> > 17" rims that the Pilot Sport, according to the Michelin company rep, is
> > being discontinued in the 335/35/17 size.  I'm trying to get a matched
> > set of 235/40/17 and 335/35/17 from a single manufacturer.  Is anyone
> > making this combination?
>
> I'm running 315/35/17 Pilot Sports and no one has said anything to me
> about needing bigger tires. . .
>
>           --mike                   | "No room for luggage
>     mc121639 at ncrxxx.com            8      or wusses..."
>        (Remove xxx's)              |  '71 Detomaso Pantera
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