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Try this
Charly Mitchel=20
TR6 #44
https://www.turbinecar.com/tires.htm
----- Original Message -----=20
From: dustin nicholson via Fot=20
To: fot@autox.team.net=20
Sent: Thursday, June 27, 2019 2:29 PM
Subject: Re: [Fot] Curious Tire size conversion
To determine the size of the old tire in modern designation format =
measure the 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 + The bottom side wall. When added to the 15 inch wheel diameter it =
would give you a tire diameter of 24.20 inches. This is just a guess of =
what they mean by 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 width gives you a height to width ratio of 1.20 which is =
your second number... but 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 wrong).
It appears that the old tire is 1.7 inches narrower than your new =
185-65-15 and 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:
I should've been a little bit more clear than mud. =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.
FYI - I'm going with the 185-65-15
Todd
On June 27, 2019 at 11:08 AM Redmond via Fot <fot@autox.team.net> =
wrote:=20
Friends,
Curious question:
I have 1 Goodyear Blue Streak tire from when my dad raced my TR3.
Size says 5.50-9.20-15
What size would this be in today's sizing?
Thanks
Todd
=20
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<DIV><FONT size=3D2 face=3DArial></FONT> </DIV>
<DIV>Try this</DIV>
<DIV>Charly Mitchel </DIV>
<DIV>TR6 #44</DIV>
<DIV><FONT size=3D2 face=3DArial><A=20
href=3D"https://www.turbinecar.com/tires.htm";>https://www.turbinecar.com/=
tires.htm</A></FONT></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; =
PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: =
black"><B>From:</B>=20
<A title=3Dfot@autox.team.net =
href=3D"mailto:fot@autox.team.net";>dustin nicholson=20
via Fot</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dfot@autox.team.net=20
href=3D"mailto:fot@autox.team.net";>fot@autox.team.net</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Thursday, June 27, 2019 =
2:29=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: [Fot] Curious Tire =
size=20
conversion</DIV>
<DIV><BR></DIV>To determine the size of the old tire in modern =
designation=20
format measure the tread width in millimeters, I=E2=80=99m guessing =
5.5 inches times=20
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 top =
side wall + The=20
bottom side wall. When added to the 15 inch wheel diameter it would =
give you a=20
tire diameter of 24.20 inches. This is just a guess of what they mean =
by=20
9.20.</DIV>
<DIV><BR></DIV>
<DIV>Next, Measure the side wall height in millimeters, I=E2=80=99m =
guessing 9.20=20
inches/2 x 25.4 =3D 117mm. Divide 117 sidewall height by the 140 tread =
width=20
gives you a height to width ratio of 1.20 which is your second =
number... but=20
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=20
means is correct, if not, just measure the sidewall as my 120 number =
would be=20
wrong).</DIV>
<DIV><BR></DIV>
<DIV>It appears that the old tire is 1.7 inches narrower than your new =
185-65-15 and there is only 1/10 of an inch difference in the tire=20
height.</DIV>
<DIV><BR></DIV>
<DIV>Dustin<BR><BR>
<DIV dir=3Dltr id=3DAppleMailSignature>Sent from my iPhone</DIV>
<DIV dir=3Dltr><BR>On Jun 27, 2019, at 1:19 PM, Redmond via Fot <<A =
href=3D"mailto:fot@autox.team.net";>fot@autox.team.net</A>>=20
wrote:<BR><BR></DIV>
<BLOCKQUOTE type=3D"cite">
<DIV dir=3Dltr>
<P style=3D"FONT-FAMILY: Helvetica">I should've been a little bit =
more clear=20
than mud. <BR></P>
<P style=3D"FONT-FAMILY: Helvetica">I'm just curious as to what the =
size tire=20
he was running back in the 1960's. Can anyone translate the =
5.50-9.20-15=20
into today's sizing.<BR></P>
<P style=3D"FONT-FAMILY: Helvetica">FYI - I'm going with the =
185-65-15<BR></P>
<P style=3D"FONT-FAMILY: 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 June 27, 2019 at 11:08 AM Redmond via =
Fot=20
<<A =
href=3D"mailto:fot@autox.team.net";>fot@autox.team.net</A>> wrote:=20
<BR><BR>
<P style=3D"FONT-FAMILY: Helvetica">Friends,<BR></P>
<P style=3D"FONT-FAMILY: Helvetica"><BR></P>
<P style=3D"FONT-FAMILY: Helvetica">Curious question:<BR></P>
<P style=3D"FONT-FAMILY: Helvetica">I have 1 Goodyear Blue Streak =
tire from=20
when my dad raced my 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=20
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: Helvetica" =
class=3Ddefault-style><BR> </P>
<BLOCKQUOTE =
type=3D"cite">_______________________________________________=20
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<P style=3D"FONT-FAMILY: Helvetica"=20
class=3Ddefault-style><BR> </P></DIV></BLOCKQUOTE>
<BLOCKQUOTE type=3D"cite">
<DIV=20
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dir=3Dltr><SPAN>_______________________________________________</SPAN><BR=
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<HR>
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