--===============7564488365811189878==
boundary=Apple-Mail-908802AC-DFE6-46F7-B929-5D56C5FF25EE
Content-Transfer-Encoding: 7bit
--Apple-Mail-908802AC-DFE6-46F7-B929-5D56C5FF25EE
charset=utf-8
Content-Transfer-Encoding: quoted-printable
To determine the size of the old tire in modern designation format measure t=
he tread width in millimeters, I=E2=80=99m guessing 5.5 inches times 25.4 =3D=
140, that=E2=80=99s your first number.
I=E2=80=99m guessing 9.20 is the dimension in inches of the top side wall + T=
he bottom side wall. When added to the 15 inch wheel diameter it would give y=
ou a tire diameter of 24.20 inches. This is just a guess of what they mean b=
y 9.20.
Next, Measure the side wall height in millimeters, I=E2=80=99m guessing 9.20=
inches/2 x 25.4 =3D 117mm. Divide 117 sidewall height by the 140 tread widt=
h gives you a height to width ratio of 1.20 which is your second number... b=
ut they don=E2=80=99t show the decimal so it reads as 120.
So the old 5.50-9.20-15 =3D a new 140-120-15 (if my guess of what 9.20 means=
is correct, if not, just measure the sidewall as my 120 number would be wro=
ng).
It appears that the old tire is 1.7 inches narrower than your new 185-65-15 a=
nd there is only 1/10 of an inch difference in the tire height.
Dustin
Sent from my iPhone
> On Jun 27, 2019, at 1:19 PM, Redmond via Fot <fot@autox.team.net> wrote:
>=20
> I should've been a little bit more clear than mud. =20
>=20
> I'm just curious as to what the size tire he was running back in the 1960'=
s. Can anyone translate the 5.50-9.20-15 into today's sizing.
>=20
> FYI - I'm going with the 185-65-15
>=20
> Todd
>=20
>=20
>=20
>=20
>=20
>> On June 27, 2019 at 11:08 AM Redmond via Fot <fot@autox.team.net> wrote:=20=
>>=20
>> Friends,
>>=20
>>=20
>>=20
>> Curious question:
>>=20
>> I have 1 Goodyear Blue Streak tire from when my dad raced my TR3.
>>=20
>> Size says 5.50-9.20-15
>>=20
>> What size would this be in today's sizing?
>>=20
>> Thanks
>>=20
>> Todd
>>=20
>=20
> =20
>=20
>> _______________________________________________=20
>> fot@autox.team.net=20
>>=20
>> http://www.fot-racing.com=20
>>=20
>> Donate: http://www.team.net/donate.html=20
>> Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot=20=
>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/alfetta95@o=
ptonline.net=20
>>=20
>>=20
>=20
> =20
>=20
> _______________________________________________
> fot@autox.team.net
>=20
> http://www.fot-racing.com
>=20
> Donate: http://www.team.net/donate.html
> Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/nicholsondus=
tin@yahoo.com
>=20
>=20
--Apple-Mail-908802AC-DFE6-46F7-B929-5D56C5FF25EE
charset=utf-8
Content-Transfer-Encoding: quoted-printable
<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto">To determine the size of the old tire in mo=
dern designation format measure the tread width in millimeters, I=E2=80=99m g=
uessing 5.5 inches times 25.4 =3D 140, that=E2=80=99s your first number.<div=
><br></div><div>I=E2=80=99m guessing 9.20 is the dimension in inches of the t=
op side wall + The bottom side wall. When added to the 15 inch wheel diamete=
r it would give you a tire diameter of 24.20 inches. This is just a guess of=
what they mean by 9.20.</div><div><br></div><div>Next, Measure the side wal=
l height in millimeters, I=E2=80=99m guessing 9.20 inches/2 x 25.4 =3D 117mm=
. Divide 117 sidewall height by the 140 tread width gives you a height to wi=
dth ratio of 1.20 which is your second number... but they don=E2=80=99t show=
the decimal so it reads as 120.</div><div><br></div><div>So the old 5.50-9.=
20-15 =3D a new 140-120-15 (if my guess of what 9.20 means is correct, if no=
t, just measure the sidewall as my 120 number would be wrong).</div><div><br=
></div><div>It appears that the old tire is 1.7 inches narrower than your ne=
w 185-65-15 and there is only 1/10 of an inch difference in the tire height.=
</div><div><br></div><div>Dustin<br><br><div id=3D"AppleMailSignature" dir=3D=
"ltr">Sent from my iPhone</div><div dir=3D"ltr"><br>On Jun 27, 2019, at 1:19=
PM, Redmond via Fot <<a href=3D"mailto:fot@autox.team.net";>fot@autox.tea=
m.net</a>> wrote:<br><br></div><blockquote type=3D"cite"><div dir=3D"ltr"=
>
<meta charset=3D"UTF-8">
<p style=3D"font-family: Helvetica;">I should've been a little bit more clea=
r than mud. <br></p><p style=3D"font-family: Helvetica;">I'm just curi=
ous as to what the size tire he was running back in the 1960's. Can anyone t=
ranslate the 5.50-9.20-15 into today's sizing.<br></p><p style=3D"font-famil=
y: Helvetica;">FYI - I'm going with the 185-65-15<br></p><p style=3D"font-fa=
mily: Helvetica;">Todd<br></p><p style=3D"font-family: Helvetica;"><br></p><=
p style=3D"font-family: Helvetica;"><br></p><blockquote type=3D"cite">On Jun=
e 27, 2019 at 11:08 AM Redmond via Fot <<a href=3D"mailto:fot@autox.team.=
net">fot@autox.team.net</a>> wrote: <br> <br><p style=3D"font-family: Hel=
vetica;">Friends,<br></p><p style=3D"font-family: Helvetica;"><br></p><p sty=
le=3D"font-family: Helvetica;">Curious question:<br></p><p style=3D"font-fam=
ily: Helvetica;">I have 1 Goodyear Blue Streak tire from when my dad raced m=
y TR3.<br></p><p style=3D"font-family: Helvetica;">Size says 5.50-9.20-15<br=
></p><p style=3D"font-family: Helvetica;">What size would this be in today's=
sizing?<br></p><p style=3D"font-family: Helvetica;">Thanks<br></p><p style=3D=
"font-family: Helvetica;">Todd<br></p></blockquote><p style=3D"font-family: H=
elvetica;" class=3D"default-style"><br> </p><blockquote type=3D"cite">_=
______________________________________________ <br><a href=3D"mailto:fot@aut=
ox.team.net">fot@autox.team.net</a> <br> <br><a href=3D"http://www.fot-racin=
g.com">http://www.fot-racing.com</a> <br> <br>Donate: <a href=3D"http://www.=
team.net/donate.html">http://www.team.net/donate.html</a> <br>Archive: <a hr=
ef=3D"http://autox.team.net/archive";>http://autox.team.net/archive</a> <a hr=
ef=3D"http://www.team.net/pipermail/fot";>http://www.team.net/pipermail/fot</=
a> <br>Unsubscribe/Manage: <a href=3D"http://autox.team.net/mailman/options/=
fot/alfetta95@optonline.net">http://autox.team.net/mailman/options/fot/alfet=
ta95@optonline.net</a> <br> <br> <br></blockquote><p style=3D"font-family: H=
elvetica;" class=3D"default-style"><br> </p>
</div></blockquote><blockquote type=3D"cite"><div dir=3D"ltr"><span>_______=
________________________________________</span><br><span><a href=3D"mailto:f=
ot@autox.team.net">fot@autox.team.net</a></span><br><span></span><br><span><=
a href=3D"http://www.fot-racing.com";>http://www.fot-racing.com</a></span><br=
><span></span><br><span>Donate: <a href=3D"http://www.team.net/donate.html";>=
://autox.team.net/archive">http://autox.team.net/archive</a> <a href=3D"http=
://www.team.net/pipermail/fot">http://www.team.net/pipermail/fot</a></span><=
br><span>Unsubscribe/Manage: <a href=3D"http://autox.team.net/mailman/option=
s/fot/nicholsondustin@yahoo.com">http://autox.team.net/mailman/options/fot/n=
icholsondustin@yahoo.com</a></span><br><span></span><br><span></span><br></d=
iv></blockquote></div></body></html>=
--Apple-Mail-908802AC-DFE6-46F7-B929-5D56C5FF25EE--
--===============7564488365811189878==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
--===============7564488365811189878==--
|