Sorry for late reply - probably already solved, but here are some
data I have compiled from 1960's to 2015 on tires.
First I will list 8.00-14 as it evolved to P215/75R14
(P/225/70R14), noting that P215/75R14 is largest 14 inch whitewall
(Narrow White) in current full scale production as of 2019.
(Hankook Optima H724 price around $65-80). There are other
specialty tires ($200-300 range) including 8.00-14, G78-14, and
P215/75 R14 including wide whitewalls, but for the most part these
are limited production specialty runs, in some cases using
outdated equipment. There is also an American Classic in
P235/75R14 in whitewall (Wide and Narrow White?).
I will note that in early days, to provide a soft ride, tire
design was based on 24 psi, frequently with note in fine print to
increase pressure (up to 32 psi) for sustained high speed or
increased load. If I recall correctly the 24 psi assumed driver
plus 2 passengers and 1 suitcase. Anything more moved you to
higher load. And Speed limits were mostly assumed to be 60 mph.
Later load capacities were based on 32 psi, and most current
standard load range radials are based on 44 psi - so dont assume
load ratings are directly comparable - and it your rims are old
beat up rusty things, dont assume you can go to 44 psi safely.
Also, belted and later radial tires tend to have more
flexible sidewalls and give lower ride height for a given
diameter. This is reflected in the SLR (Static Loaded Radius)
column if I had any data from manufacturers data sheets. Most
likely your 8.50-14 had a SLR of about 13 in, while a P215/75R14
would be closer to 12 inches and even the P235/75R14 is likely to
be only 12.5 to 12.6 inches, hence lowering the car about a half
inch despite being oversize to the P225/75R14 equivalent to the
original 8.50-14
Second I will list the 8.50-14 to P225/75R14 specifications as
these are more likely applicable to C-body cars. Unfortunately the
last P225/75R14 I know of were produced by Cooper in 2006.
Lastly I will provide data for 9.00-14 to P235/75R14 - again, I
believe the American Classic is currently available in the
P235/75R14 as of 2019.
| SIZE |
MFG |
TYPE |
Sidewall |
OD |
LOAD |
RPM |
LR |
SWid |
RimW |
TWid |
SLR |
Cost |
Source |
| 8.00-14 |
BFG |
Deluxe Silvertown (3-60 Mfg Spec) |
|
27.54 |
1175@24 |
|
|
7.5 |
5.5 |
4.53 |
12.79 |
?? |
1960 BFG |
| 8.25-14 |
GoodYear |
Power Cushion (Mfg Spec) |
|
27.56 |
1380@24 |
|
|
8.2 |
6 |
?? |
?? |
?? |
1967 Goodyear |
| 205R14 |
Michelin |
XWW (Mfg Spec) |
|
26.9 |
1620 |
778 |
|
8.1 |
6 |
?? |
12 |
?? |
Michelin 1979 |
| G78-14 |
General |
Belted Jumbo 780 (OE) |
|
27.27 |
|
|
|
8.54 |
6 |
?? |
12.47 |
?? |
General 1971 |
| GR78-14 |
Michelin |
XWW (Mfg Spec) |
|
26.8 |
1620 |
782 |
|
8.4 |
5.5 |
?? |
11.8 |
?? |
Michelin 1979 |
| P215/75R14 |
Michelin |
X (Mfg Spec) |
|
26.8 |
1665 |
776 |
|
8.7 |
6 |
?? |
11.9 |
?? |
Michelin 1985 |
| P215/75R14 |
Hankook |
H724 |
NW |
26.7 |
1664 |
778 |
98S |
8.5 |
6 |
5.3 |
?? |
$81 |
Hankook 2014 |
| P215/75R14 |
American
Classic |
NW |
26.69 |
1664 |
|
98S |
8.5 |
?? |
5.68 |
?? |
?? |
Coker 2014 |
P215/75R14
|
Toyo
|
Extensa A/S
|
Black
|
26.7
|
1664
|
778
|
98S
|
8.3
|
|
|
12.0
|
|
Toyo 2014
|
| 225/70R14 |
Hankook |
H725 |
Black |
26.3 |
1675 |
789 |
98T |
8.9 |
6.5 |
6.6 |
?? |
?? |
Hankook 2014 |
| 225/70R14 |
General |
Altimax RT43 |
Black |
|
|
|
|
|
|
|
?? |
?? |
?? |
| 225/70R14 |
Cooper |
Cobra GT |
RWL |
26.27 |
1675 |
|
|
8.92 |
6.5 |
7.2 |
?? |
?? |
?? |
| 225/70R14 |
BFG |
RedLine |
Red |
26.3 |
1675 |
|
|
8.9 |
?? |
6.7 |
?? |
$186 |
Coker |
| SIZE |
MFG |
TYPE |
Sidewall |
OD |
LOAD |
RPM |
LR |
SWid |
RimW |
TWid |
SLR |
Cost |
Source |
| 8.50-14 |
BFG |
Deluxe Silvertown (3-60 Mfg Spec) |
|
28.3 |
1265@24 |
|
|
7.86 |
5.5 |
4.73 |
13.07 |
?? |
1960 BFG |
| 8.50-14 |
Firestone |
Deluxe Champion (3-61 Mfg Spec) |
|
28.4 |
1265 |
|
|
8.04 |
5.5 |
?? |
13 |
?? |
1961 Firestone |
| 8.55-14 |
GoodYear |
Power Cushion (Mfg Spec) |
|
28.24 |
1510@24 |
|
|
8.5 |
6 |
?? |
?? |
?? |
1967 Goodyear |
| 8.55-14 |
General |
Jet-Air II Rayon |
|
28.26 |
|
|
|
8.54 |
6 |
?? |
12.81 |
?? |
General 1971 |
| 8.55-14 |
BFG |
Deluxe Silvertown Coker |
|
28.1 |
1740 |
|
|
8.35 |
?? |
4.75 |
?? |
?? |
Coker |
| 215R14 |
Michelin |
XWW (Mfg Spec) |
|
27.4 |
1770 |
765 |
|
8.4 |
6 |
?? |
12.2 |
?? |
Michelin 1979 |
| HR78-14 |
Michelin |
XWW (Mfg Spec) |
|
27.5 |
1770 |
759 |
|
8.9 |
6 |
?? |
12 |
?? |
Michelin 1979 |
| H78-14 |
General |
Belted Jumbo 780 (OE) |
|
27.85 |
|
|
|
8.8 |
6 |
?? |
12.65 |
?? |
General 1971 |
| H78-14 |
coker |
coker |
WW |
27.6 |
1770 |
|
|
8.86 |
?? |
5.75 |
?? |
?? |
Coker |
| HR78-14 |
Phillips66 |
used |
NW |
27.45 |
|
|
|
8.75 |
6 |
6 |
?? |
C300 |
?? |
| P225/75R14 |
Michelin |
X (Mfg Spec) |
|
27.6 |
1795 |
757 |
|
8.9 |
6 |
?? |
12.1 |
?? |
Michelin 1985 |
| P225/75R14 |
Firestone |
721 Steel Belted Radial |
NW |
27.35 |
|
|
|
9 |
6 |
6.15 |
12 |
?? |
Firestone 10-86 |
| 225/75R14 |
Cooper |
TrendsetterSE |
NW |
27.05 |
1797 |
|
|
8.7 |
6 |
5.6 |
?? |
?? |
Cooper 2006 |
| H70-14 |
GoodYear |
Speedway WT (Mfg Spec) |
|
27.78 |
1510@24 |
764 |
|
9.1 |
6 |
6.81 |
?? |
?? |
1967 Goodyear |
| P235/70R14 |
Firestone |
SS Radial |
|
26.66 |
|
|
|
8.85 |
6.5 |
6.27 |
11.54 |
?? |
Firestone 10-86 |
| SIZE |
MFG |
TYPE |
Sidewall |
OD |
LOAD |
RPM |
LR |
SWid |
RimW |
TWid |
SLR |
Cost |
Source |
| 9.00-14 |
BFG |
DS (3-60 Mfg Spec) |
|
28.8 |
1355@24 |
|
|
8.25 |
6 |
4.93 |
13.26 |
?? |
1960 BFG |
| 9.00-14 |
Firestone |
DC (3-61 Mfg Spec) |
|
29 |
1355 |
|
|
8.53 |
6 |
?? |
13.2 |
?? |
1961 Firestone |
| 9.00-14 |
BFG |
DS Coker |
NW |
28.68 |
|
|
|
8.8 |
?? |
4.8 |
?? |
$184 |
Coker |
| 8.85-14 |
General |
Jet-Air II Nygen |
|
28.3 |
|
|
|
8.96 |
6 |
?? |
12.99 |
?? |
General 1971 |
| 8.85-14 |
BFG |
DS Coker |
NW |
28.68 |
1860 |
|
|
8.8 |
?? |
4.8 |
?? |
?? |
Coker |
| J78-14 |
General |
Dual S-90 Sidewinder |
?? |
28.24 |
|
|
|
9 |
6 |
|
12.81 |
?? |
General 1971 |
| J78-14 |
GoodYear |
OE Polyglas |
DW |
28.2 |
|
|
|
|
|
|
?? |
67 NY |
measured 67 NY |
| 235/75R14 |
American
Classic |
NW |
27.87 |
1930 |
|
104S |
9.25 |
?? |
6.3 |
?? |
?? |
Coker 2014 |
| 245/70R14 |
generic |
No known examples
|
|
27.6 |
1940 |
|
|
|
|
|
?? |
?? |
?? |
Edward Mills
Antique Tractors 1930-1960
Antique Cars 1960-1985
On 6/25/2019 7:33 PM, 'Rich Barber'
c300@xxxxxxx [Chrysler300] wrote:
??
I would
recommend removing and preserving the original tires
and saving them for special occasions such as concours
judging.?? Buy a set of radials that match the
originals reasonably and drive hard in confidence.??
??
In the trunk of
my 1964 300K convertible-ram car, I have an early
bias-ply spare???a 8.55-14 Goodyear Power Cushion with
about 0.66??? WSW and 1.15??? black ring between WSW and
rim.?? About 5 3/4??? tread width.?? Just keeping it for
reference.?? Wish I could buy four nice radials in that
approximate configuration.?? The tire industry changed
the tire size between 1964 and 1965 as the big tire on
the ???64 was an 8.50-14.?? From what I???ve seen, tire
dimensions did not change much, if at all.
??
Rich Barber
Brentwood, CA
??
??
??
Well, that???s an easy
decision, my 65 300L is original from front to
back & I was hoping to keep the wheels &
hubcaps!!!??
Amazingly after sitting for
25 years in a garage, it still has original
bias ply tires. ????????
??I just had the AC serviced
& charged with R12 & it???s getting
super cold & not leaking!! ????????????
Curtis
Fredericksburg,
Texas??78624
This message is
intended only for the person(s) to whom
it is addressed and may contain
privileged, confidential, and/or insider
information. If you have received this
communication in error, please notify us
immediately by replying to the message
and deleting it from your computer.?? Any
disclosure, copying, distribution, or
taking of any action concerning the
contents of this message and any
attachment(s) by anyone other than the
named recipient(s) is strictly
prohibited.??
Good
for you, Noel.?? They are only
original once.
??
Curtis, William,
Stayed with 14???. Don???t
want to change hubcaps
or go to the 15??? wheels
with inserts to retain
the 14??? hubcaps. My
6-ply Eurospec DBacks
were actually an inch
too short, so the car
sat a little low. That
said, I put 55,000 miles
on them in the past 9
years and it drove
great. Long trips from
Chicago to 300 Meets in
NM, CT, NY, RI, VA, WV,
AR, MO and more. Many of
these trips were in
driving rain (monsoon
downpours 7 of 9 days to
NM and back). New ACs
are taller and the F
sits higher and looks
better, and drove fine
to TX and back. We (John
Begian in his beautiful
black best of show
convertible and I) have
done a lot of this long
distance cruising
running our F and G
together on flat as well
as twisty mountain
roads, and I???ve never
felt the F was
under-tired, typically
running at 75 mph.??
I know I???m an anomaly,
still running drum
brakes, dual points
and 14??? tires, but the
F has performed great,
and I have no
intention of changing
these.??
??
Noel,
Are
you running 14???
or 15??? tires???
My
300F has 14???
& everyone
says to go to
15??? for safety
& a better
ride.
Curtis
Fredericksburg,
Texas??78624
This
message is
intended only
for the
person(s) to
whom it is
addressed and
may contain
privileged,
confidential,
and/or insider
information.
If you have
received this
communication
in error,
please notify
us immediately
by replying to
the message
and deleting
it from your
computer.?? Any
disclosure,
copying,
distribution,
or taking of
any action
concerning the
contents of
this message
and any
attachment(s)
by anyone
other than the
named
recipient(s)
is strictly
prohibited.??
??
Put American Classics on
my F this
year. Drove it
2400 miles
trip to our
Dallas Meet
from Chicago,
and they
performed well
at speed. A
little
different
(read -
softer) feel
than my 9 yr
old
Diamondbacks
that had
55,000 miles
on them.
American
Classics will
take a few
more wheel
weights than
did the
Diamondbacks.
Make sure you
mount all
weights on the
backside of
your rims.??
Noel??
??
??
Coker American Classic
radials. ??Yes,
have them on
three cars F,
55 and 56
Imps. ??Not
perfect, but
want the look
and in fact
they???re
satisfactory
at speed.
M.
??
Anyone
have any
experience
using American
Classic radial
tires on their
letter car?
??
__._,_.___
Posted by: EMills_ATC <millserat@xxxxxxxxxxxxx>
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