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Dusty:
Back when I first raced my TR4A (solid axle) I ran zero offset wheels (hub =
interface exactly centered in the wheel) plus one-inch spacers. =C2=A0I had=
to notch the rear springs as shown in your picture because the slicks of t=
he day (1979-84) would move in and out by well over over an inch and rub th=
e springs. =C2=A0Now, running the same set up with 7 inch wheels (legal in =
HRG with whom I almost always run, John) and the Hoosier TDR 23 x 7.5 x 15 =
they never touch the stock-width springs. =C2=A0Note that the=C2=A0TR4A sol=
id axle springs are very similarly spaced from the hub as the TR3, not as f=
ar in as on the 4.
Phil Gott
-----Original Message-----
From: Roger Williams via Fot <fot@autox.team.net>
To: John Styduhar <johnstydo@gmail.com>
Cc: fot@autox.team.net
Sent: Mon, May 10, 2021 9:27 pm
Subject: Re: [Fot] TR3 wheel offset
There is this thing called scrub radius. When the factory engineers designe=
d your car they set it in a proper position. If you add spacers or get tall=
er tires or shorter tires or install the wrong rims you can make your car d=
angerously unstable at worst or at least make parts wear out and or break i=
mportant bits causing a crash. Making a racecar unstable is not a good idea=
. If you do not know where the scrub radius is on your front tires...maybe =
you should. Attached is a simple look at what can get very complex and dang=
erous.CheersRoger Williams
https://www.carthrottle.com/post/what-is-scrub-radius-and-why-is-it-importa=
nt/
Sent from my iPad
On May 10, 2021, at 6:30 PM, John Styduhar via Fot <fot@autox.team.net> wro=
te:
=EF=BB=BFAs a word of caution to you, running the stock rear axles and hubs=
is asking for trouble since they have been known=C2=A0to break with the ad=
ded stress of racing.=C2=A0 =C2=A0Upgrading to one-piece axle would be wise=
if you are getting serious.
On Mon, May 10, 2021 at 3:49 PM dustin nicholson via Fot <fot@autox.team.ne=
t> wrote:
Amici,
What wheel width and offset are y=E2=80=99all running on a vintage legal tr=
ack car?
I=E2=80=99m looking at buying I set of vintage wheels that have practically=
zero offset. Attached are photos of my test fit that show the wheel sits i=
n more than seems right. I like the wheels but I=E2=80=99m not sure they=E2=
=80=99re what I need.
On the front the outer rim is a couple of inches inboard from the fender li=
p. On the rear the inner rim clears the leafspring by less than a half inch=
. You can see where the previous owner notched the leaf springs so the tire=
won=E2=80=99t rub, so I suppose I can make these wheels work but I might b=
e giving up track width.=20
Thanks,
Dusty Nicholson _______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
il.com
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
cing@gmail.com
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
com
------=_Part_1377586_233721610.1620732515407
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<div style=3D"font-size:10pt;font-family:arial,helvetica,sans-serif;color:b=
lack;"><div style=3D"font-family: arial,helvetica,sans-serif; font-size: 10=
pt; color: black;" data-mce-style=3D"font-family: arial,helvetica,sans-seri=
f; font-size: 10pt; color: black;">Dusty:</div><div style=3D"font-family: a=
rial,helvetica,sans-serif; font-size: 10pt; color: black;" data-mce-style=
=3D"font-family: arial,helvetica,sans-serif; font-size: 10pt; color: black;=
"><br></div><div style=3D"font-family: arial,helvetica,sans-serif; font-siz=
e: 10pt; color: black;" data-mce-style=3D"font-family: arial,helvetica,sans=
-serif; font-size: 10pt; color: black;">Back when I first raced my TR4A (so=
lid axle) I ran zero offset wheels (hub interface exactly centered in the w=
heel) plus one-inch spacers. I had to notch the rear springs as shown=
in your picture because the slicks of the day (1979-84) would move in and =
out by well over over an inch and rub the springs. Now, running the s=
ame set up with 7 inch wheels (legal in HRG with whom I almost always run, =
John) and the Hoosier TDR 23 x 7.5 x 15 they never touch the stock-width sp=
rings. Note that the TR4A solid axle springs are very similarly =
spaced from the hub as the TR3, not as far in as on the 4.</div><div style=
=3D"font-family: arial,helvetica,sans-serif; font-size: 10pt; color: black;=
" data-mce-style=3D"font-family: arial,helvetica,sans-serif; font-size: 10p=
t; color: black;"><br></div><div style=3D"font-family: arial,helvetica,sans=
-serif; font-size: 10pt; color: black;" data-mce-style=3D"font-family: aria=
l,helvetica,sans-serif; font-size: 10pt; color: black;">Phil Gott<br><br><b=
r>-----Original Message-----<br>From: Roger Williams via Fot <fot@autox.=
team.net><br>To: John Styduhar <johnstydo@gmail.com><br>Cc: fot@au=
tox.team.net<br>Sent: Mon, May 10, 2021 9:27 pm<br>Subject: Re: [Fot] TR3 w=
heel offset<br><br></div><div id=3D"yiv4403915945"><div>There is this thing=
called scrub radius. When the factory engineers designed your car they set=
it in a proper position. If you add spacers or get taller tires or shorter=
tires or install the wrong rims you can make your car dangerously unstable=
at worst or at least make parts wear out and or break important bits causi=
ng a crash. Making a racecar unstable is not a good idea. If you do not kno=
w where the scrub radius is on your front tires...maybe you should. Attache=
d is a simple look at what can get very complex and dangerous.<div>Cheers</=
div><div>Roger Williams<br clear=3D"none"><div><br clear=3D"none"></div><di=
v><a rel=3D"nofollow noopener noreferrer" shape=3D"rect" target=3D"_blank" =
href=3D"https://www.carthrottle.com/post/what-is-scrub-radius-and-why-is-it=
-important/">https://www.carthrottle.com/post/what-is-scrub-radius-and-why-=
is-it-important/</a><br clear=3D"none"><br clear=3D"none"><div dir=3D"ltr">=
Sent from my iPad</div><div dir=3D"ltr"><div class=3D"yiv4403915945yqt99567=
14646" id=3D"yiv4403915945yqtfd34443"><br clear=3D"none"><blockquote type=
=3D"cite">On May 10, 2021, at 6:30 PM, John Styduhar via Fot <fot@autox.=
team.net> wrote:<br clear=3D"none"><br clear=3D"none"></blockquote></div=
></div><blockquote type=3D"cite"><div dir=3D"ltr"><div class=3D"yiv44039159=
45yqt9956714646" id=3D"yiv4403915945yqtfd05460">=EF=BB=BF<div dir=3D"ltr"><=
div class=3D"yiv4403915945gmail_default" style=3D"font-size: small;" data-m=
ce-style=3D"font-size: small;">As a word of caution to you, running the sto=
ck rear axles and hubs is asking for trouble since they have been known&nbs=
p;to break with the added stress of racing. Upgrading to one-pi=
ece axle would be wise if you are getting serious.</div></div><br clear=3D"=
none"><div class=3D"yiv4403915945gmail_quote"><div class=3D"yiv4403915945gm=
ail_attr" dir=3D"ltr">On Mon, May 10, 2021 at 3:49 PM dustin nicholson via =
Fot <<a rel=3D"nofollow noopener noreferrer" shape=3D"rect" ymailto=3D"m=
ailto:fot@autox.team.net" target=3D"_blank" href=3D"mailto:fot@autox.team.n=
et">fot@autox.team.net</a>> wrote:<br clear=3D"none"></div><blockquote c=
lass=3D"yiv4403915945gmail_quote" style=3D"margin: 0px 0px 0px 0.8ex; borde=
r-left: 1px solid #cccccc; padding-left: 1ex;" data-mce-style=3D"margin: 0p=
x 0px 0px 0.8ex; border-left: 1px solid #cccccc; padding-left: 1ex;">Amici,=
<br clear=3D"none">
<br clear=3D"none">
What wheel width and offset are y=E2=80=99all running on a vintage legal tr=
ack car?<br clear=3D"none">
<br clear=3D"none">
I=E2=80=99m looking at buying I set of vintage wheels that have practically=
zero offset. Attached are photos of my test fit that show the wheel sits i=
n more than seems right. I like the wheels but I=E2=80=99m not sure they=E2=
=80=99re what I need.<br clear=3D"none">
<br clear=3D"none">
On the front the outer rim is a couple of inches inboard from the fender li=
p. On the rear the inner rim clears the leafspring by less than a half inch=
. You can see where the previous owner notched the leaf springs so the tire=
won=E2=80=99t rub, so I suppose I can make these wheels work but I might b=
e giving up track width. <br clear=3D"none">
<br clear=3D"none">
<br clear=3D"none">
<br clear=3D"none">
Thanks,<br clear=3D"none">
<br clear=3D"none">
Dusty Nicholson _______________________________________________<br clear=3D=
"none">
<a rel=3D"nofollow noopener noreferrer" shape=3D"rect" ymailto=3D"mailto:fo=
t@autox.team.net" target=3D"_blank" href=3D"mailto:fot@autox.team.net";>fot@=
autox.team.net</a><br clear=3D"none">
<br clear=3D"none">
<a rel=3D"nofollow noopener noreferrer" shape=3D"rect" target=3D"_blank" hr=
ef=3D"http://www.fot-racing.com/";>http://www.fot-racing.com</a><br clear=3D=
"none">
<br clear=3D"none">
lank" href=3D"http://www.team.net/donate.html";>http://www.team.net/donate.h=
tml</a><br clear=3D"none">
Archive: <a rel=3D"nofollow noopener noreferrer" shape=3D"rect" target=3D"_=
blank" href=3D"http://autox.team.net/archive";>http://autox.team.net/archive=
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k" href=3D"http://www.team.net/pipermail/fotUnsubscribe/Manage";>http://www.=
team.net/pipermail/fot<br clear=3D"none">
ct" target=3D"_blank" href=3D"http://autox.team.net/mailman/options/fot/joh=
nstydo@gmail.com">http://autox.team.net/mailman/options/fot/johnstydo@gmail=
.com</a><br clear=3D"none">
<br clear=3D"none">
<br clear=3D"none">
</blockquote></div>
<span>_______________________________________________</span><br clear=3D"no=
ne"><span>fot@autox.team.net</span><br clear=3D"none"><span></span><br clea=
r=3D"none"><span>http://www.fot-racing.com</span><br clear=3D"none"><span><=
/span><br clear=3D"none"><span>Donate: http://www.team.net/donate.html</spa=
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anage: http://autox.team.net/mailman/options/fot/coelacanth.racing@gmail.co=
m</span><div class=3D"yiv4403915945yqt9956714646" id=3D"yiv4403915945yqtfd7=
1600"><br clear=3D"none"><span></span><br clear=3D"none"><span></span><br c=
lear=3D"none"></div></div></blockquote></div></div></div></div><div class=
=3D"yqt9956714646" id=3D"yqtfd72251">______________________________________=
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_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
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