[DeTomaso] Stress-relieving Rims

[Scott Bell]

Why is this needed? Are people having problems with Campy rims breaking?

-----Original Message-----
From: detomaso-bounces at poca.com [mailto:detomaso-bounces at poca.com] On Behalf Of Stephen Nelson
Sent: Friday, August 16, 2013 12:20 PM
To: detomaso at poca.com
Subject: [DeTomaso] Stress-relieving Rims

Will stress-relieving original Campy rims at 375 F damage the original
paint?

 

Stephen Nelson

 

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From: MikeLDrew at aol.com [mailto:MikeLDrew at aol.com] 
Sent: Wednesday, July 03, 2013 3:36 PM
To: steve at snclocks.com
Cc: detomaso at poca.com
Subject: Re: [DeTomaso] Rim Offsets

 


In a message dated 7/3/13 9 29 36, steve at snclocks.com writes:






Mike - thanks for the extensive comments.  I do plan to drive 5332 for a
while, get used to it and see how it all hangs together. 
 
Right - scrub radius.  As I understand it, increasing scrub radius makes it
easier to park the car but more sensitive to external forces acting on the
tires when rolling down the highway - like uneven brake application.  Oh,
and "excessive" scrub requires more steering effort when going down the road
and increases the "feel" of the steering. 
 
In my feeble brain, if the inside of the rim is at the same place with both
7 and 8 inch wide rims,


>>>...which it's not...




> well, going to an 8 inch rim increases scrub radius by a quarter inch.  Of
course, I don't know that inside edge of 7 and 8 inch rims are at the same
point.  But, since you indicate that the 8 inch rims improve handling, I
assume this means that the offset is increased a bit.  You indicate that
increasing scrub radius improves handling - does that include reducing
tramlining?  Or am I really just asking too nit-picky of questions?


>>>You're absolutely asking too nit-picky of questions...but that's why we
are all here.  We love this stuff! :>)

The outside of the wheels is in the same place.  The 8-inch wide wheels are
one inch wider on the inside.  If the tire size is the same (that is, you
take a tire off the 7-inch wheel and put it on the 8-inch wheel), the center
of the tire is moved inboard by 1/2 inch.  That makes a fair difference.



 
> From your e-mail I conclude that a set of four 8 inch wide original rims
is the way you would recommend for my situation - if the Coddingtons leave
me feeling like I would want to make a change?


>>>Yes, although it will be difficult to buy a set of four, 8-inch wheels.
You might wind up buying two sets of 7s and 8s to get there, and then
selling the 7s to some Mustang guy.  Alternately, the easy solution would be
to just buy one set and put them on the car.



 
> Which Coddingtons.  The gentleman who put them on told me that they were
special, an early set with a flat center section instead of the dished shape
of the later ones.  This apparently requires unusual lug nuts which are
counter sunk.  I am speaking from my notes here, and will have to see what I
can figure out when Passport drops it off this afternoon.
 
See what you think.
<http://www.provamo.com/Members/Registry/RegistryImages/RTHPNNU05332/RTHPNNU
05332.asp>  5332


>>>That is a VERY nice-looking car!  I assumed you were speaking about
Coddington's Campagnolo clones, as opposed to these, rather more generic
(but very striking) wheels.



 
>Looking at the pictures one more time, I will have to see how it drives and
rides.  You are right - gads, good looking rims.
 

>>>Yes, these look quite good indeed.  My earlier comment was that their
current-production Campagnolo wheels are revolting to look at...but these
are a completely different story.

I think when you drive the car, you will quickly get used to it and enjoy
it.  There's a lot to be said for having a lot of traction and feeling
planted in the corners, rather than skating around as you would on
old-school, low-tech tires.

Mike (who skates around on old-school, low-tech tires....)




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