i love my nice original hub caps for my 68 dart-HOWEVER-the tires are so narrow -and totally look ridiculous!
id simply like to get some wider tires-and use these wheel covers-and cruise around for a summer-before i go for the 14" ralley wheels.
BASICALLY-WHAT ARE MY TIRE OPTIONS WITH THESE VINTGAGE 13" RIMS?

Options; not a lot if any.

Look here for mass-market tire availability, and here for antique reproduction product.

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67' Dart GT Convertible; the old Chrysler Corp.
82' LeBaron Convertible; the new Chrysler Corp
07' 300 C AWD; Now by Fiat, the old new Chrysler LLC

The OEM 13" rim is only 4½" wide, which limits the maximum size of tire to P185/80R13. This tire size is now obsolete with most tire manufacturers except for Maxxis. They still offer this size at a reasonable price and shipping is included.

Maxxis P185/80R13 90S RWW MA-1

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1965 Plymouth Barracuda,
225 engine, Quadrajet, HEI, Dutra Duals, 904 Torqueflite, 2.76:1 axle, Addco front bar
Rods & Relics - Fort Erie, ON / Collector Car Tech

I bought a set of MAXXIS (Cheng Shin) tires for a '64 Valiant. The existing P185/80R13 tires were no longer in production, and the only thing I found online in this size at places like Tire Rack were trailer-specific tires. Be careful when buying online that the tire is not a trailer tire. The MAXXIS tires have a nice whitewall, and though I wish that they were in the $60 range instead of $100 (!) each, they seem to be the best option at this point if you are staying with the OEM 13" rims.

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Never seen a Valiant I didn't like!

I run 205/60/13 on the stock rims. Fit and look fine.

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The Maxxis page above specifies 5.0" as the rim width for the P185/80R13 tire. The Yokohama Rim/Wheel Width page specifies the following approved rim widths for their tires:

• P205/60R13: ... 5.5" - 7.5"
• P185/80R13: ... 5.0" - 6.5"

The OEM 13" rim is only 4.5" wide which is even a bit too narrow for the P185/80R13 tire.

I believe that the problems with using too narrow a rim are:

• adverse effect on the tire's load capacity
• adverse effect on handling due to sidewall rollover

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1965 Plymouth Barracuda,
225 engine, Quadrajet, HEI, Dutra Duals, 904 Torqueflite, 2.76:1 axle, Addco front bar
Rods & Relics - Fort Erie, ON / Collector Car Tech

I used to sell tires for Montgomery Ward back in the late 70's and I bought some 13 inch tires for my 510 datsun that had cantilever sidewall that would look great. I haven't looked to see if they still exist any more but I doubt it.

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hot rodder at heart!