Re: [Chrysler300] 300F Set of Steel Wheels Needed

225/75R14 is the proper size for full size Plymouth and Dodge cars of the era.

I only know of a Coker Source:

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NB to all our WW measuring friends. The WWs on the original Blue Streak tires measured by various Club members were on mounted spare tires. It was not determined how much of the WW may have been hidden under the bead.

This may explain why there is a discrepancy in WW measurements between unmounted specifications and mounted tires.

It is best that the WW not be under the bead.

Tony

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On Sunday, July 19, 2020, 3:45 PM, EMills_ATC millserat@xxxxxxxxxxxxx [Chrysler300] <Chrysler300-noreply@xxxxxxxxxxxxxxx> wrote:

Tony - Do you know of someone that is producing the 225/75R14's - I have been looking for a while and can only come up with 215/75R14 (replaces 8.00-14 / 8.25-14) and 235/75R14 (replaces 9.00-14).

As you noted, there is a ride height issue with any of the 75 series radials

Based on 1960 vintage tire engineering data, the typical Static Loaded Radius (Read Ride height to center ox axle) of a BF Goodrich Deluxe Silvertown 9.00-14 was 13.26 in and it had on overall diameter of 28.8 in and ran 745 revolutions per mile. There was some variation by brand and more variation of Lower grade tires vs OE. Static Loaded Radius data is somewhat harder to come by, but General 9.00-14 OE tires spec'd out at 28.7 OD and Firestone at 29.0 OD, so the BFG data is probably midrange +/- 0.1 in on radius.

As tires evolved, the 8.85-14 replaced the 9.00-14 and the J78-14 replaced the 8.85-14 and the P235/75R14 replaced the J78-14. In each instance the diameters decreased along with the static loaded radius. The static loaded radius further decreased with the move to radials as they simply sit lower for a given Diameter due to construction.

I have limited data, particularly for the 235/75R14, but here is a typical comparison

9.00-14     28.8 OD    13.26 SLR     BFGoodrich Deluxe Silvertown OE (1960)

9.00-14    28.68 OD    Coker Repro BF Goodrich Deluxe Silvertown

8.85-14    28.3 OD    12.99 SLR    General (1971)

J78-14    28.24 OD    12.81 SLR     General (1971)

J78-14    28.2 OD    Goodyear Polyglas OE

235/75R14     27.87 OD     American Classic

Even the 15 inch options with similar diameters do not come up to the 1960 9.00-14 SLR values, but they seem to be best match available if you are trying to match OD and Rev per Mile. But you are probably losing 0.3 to 0.5 in ride height compared to 0.8 to 1.0 in (estimated) loss with the largest 14 inch radials.

235/75R15    28.91 OD    12.72 SLR     Firestone 1986

235/75R15    28.9 OD    12.9 SLR    Toyo Extensa AS 2018

I have a bit more data for the 215/75R14 which is still being produced - I offer it to illustrate the point

8.00-14     27.54 OD     12.79 SLR    BF Goodrich 1960 OE

P215/75R14     26.8 OD    11.9 SLR    Michelin X 1985

P215/75R14    26.7 OD    12.0 SLR     Toyo Extensa AS 2017

So even a direct replacement size has shrunk both in OD by about 0.8 and twice as much or 0.8 on radius (SLR) and effective ride height.

Edward Mills Antique Tractors 1930-1960 Antique Cars 1960-1985

On 7/19/2020 1:45 PM, Tony Rinaldi awrdoc@xxxxxxxxx [Chrysler300] wrote:

BTW, Stockton Wheel can duplicate their 4 large bumps needed to retain non 300 Chrysler full hubcaps. They are not necessary for 300 hubcaps with claws.

Stockton will put 2 small bumps on either side of valve stem to prevent the hubcaps from rotating and damaging the valve stem.

Re tires, Diamond Back will put a 2 “ WW in a modern high speed rated SUV 235/75R15 tire. I have Michelin premium tires on my 15” wheels with 14” original “F” hubcaps. BTW, no one can tell there is a slightly larger metal around WW. You should ask that the WW extend to the mounting bead area.

Coker only sells American Classics tires in the 235/75R14 proper size tires. There is no “F” specific 2” Wide WW only 1” or 2 1/2”.

The larger 2 1/2” wide white walls were used on the original 235/75R15 “G” tires.

DO NOT USE 225/75R14 tires on full size Chryslers. The car will not be at the proper ride height.

Tony

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On Sunday, July 19, 2020, 2:25 PM, nick@xxxxxxxx wrote:

I uploaded some pictures of the correct 300F wheel.

https://photos.app.goo.gl/8zuZADdLD9XCehFx7

These have nubs around the rim that hold on some of the wheel covers. I put a 300F wheel cover on there and only the ones on either side of the valve stem match up with the teeth on the cover. My ’60 New Yorker Town & Country uses the same 14 x 6.5” wheels and you must use these wheels to use the factory wheelcovers. The bumps line up with the indents in the covers. They will not stay on wheels without those bumps.

The only 14” radial tires you can get in the US that fit the 300F are Coker Classics. There is a slightly smaller wide whitewall available in Europe that people are using over there. As tony mentioned, Stockton is making 15” wheels that will accept 14” wheel covers. You’ll end up with more rim showing than factory but since the whitewall doesn’t go all the way to the rim, it shouldn’t be that noticeable. With 15” wheels you can get Diamondback Tires to make you wide whitewalls out of any modern 15” tire available. They add them on. And people are much more satisfied with that over the Cokers.

Hope this helps.

From: Chrysler300@xxxxxxxxxxxxxxx <Chrysler300@xxxxxxxxxxxxxxx> On Behalf Of Tony Rinaldi awrdoc@xxxxxxxxx [Chrysler300]
Sent: Sunday, July 19, 2020 10:07 AM
To: Michael James <Chrysler300F@xxxxxxxxx>; Chrysler 300 List <chrysler300@xxxxxxxxxxxxxxx>
Subject: Re: [Chrysler300] 300F Set of Steel Wheels Needed

Hi Michael,

Proper 14” OR 15” wheels that accept original 14” hubcaps are available thru Stockton Wheel. Suggest getting them black powder coated.

http://www.chrysler300club.com/tech/Modern%20Replacement%20Wheels%20For%20Radial%20Tires.pdf

The right size 14” tires are not readily available any longer. 15” tires will make your car ride much better.

BTW, posting a link to Google Drive seems to be an effective work around since our Yahoo server does not allow photos.

Tony Rinaldi

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On Sunday, July 19, 2020, 9:51 AM, Michael James Chrysler300F@xxxxxxxxx [Chrysler300] <Chrysler300-noreply@xxxxxxxxxxxxxxx> wrote:

Good morning,

Precious owner of one of my Fs installed a set of 15 inch steel wheels, a picture of which is attached. I am looking for a correct set a 14 inch steel wheels for the car. Also is anyone interested or have any information as to the  15’s —-are they worth anything—perhaps correct  for another year?

Thank you!

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Re: [Chrysler300] 300F Set of Steel Wheels Needed

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