What size tires are on a 1948 Plymouth Special Deluxe?
Classic car enthusiasts often ask what tire size originally came on the 1948 Plymouth Special Deluxe and what sizes are common for restoration or modern driving. This article provides the typical factory specification and notes on common variations and how to verify the correct size for your car.
The factory-installed tire size for most 1948 Plymouth Special Deluxe models was 6.50-16 bias-ply tires on 16-inch wheels.
Original equipment tire size
In the immediate postwar era, Plymouth outfitted the Special Deluxe with 16-inch wheels and tires sized 6.50-16. This combination was standard across many Plymouth models of the period, and it contributed to the familiar proportion and handling feel of the era. The 6.50-16 designation refers to the tire width and the wheel diameter, with the aspect ratio historically determined by the tire design rather than a separate numeric code used today.
Variations and replacements you may encounter
Owners who restore or maintain these cars often encounter a few common size variations, depending on wheel width, availability, and the era of the replacement tires. The following options are frequently seen in the field:
- Original-equipment size: 6.50-16 bias-ply tires on 16-inch wheels.
- Common replacement with the same size: 6.50-16 bias-ply tires to preserve the vintage appearance and handling.
- Alternate-width replacements: 7.50-16 bias-ply tires may be used if the wheel width and suspension clearances permit, though this can alter the stance and speedometer readings.
- Modern radial options: 205/75R16 or 215/75R16 bias-friendly radials are sometimes chosen for ride comfort and availability, but they can affect the car’s proportions and alignment; consult a vintage-tire specialist before switching.
When selecting tires for a restored or daily-driven Special Deluxe, consider fit, clearance, and authenticity. The exact size can vary by production date, body style, and any modifications made over the years. Always verify the correct size for your specific car with the data plate, owner’s manual, or a qualified vintage-tire professional.
How to verify the correct size on your Plymouth
To confirm the correct tire size, start with the vehicle’s data plate. On most 1948 Plymouths, the information plate is located on the door jamb or inside the glove compartment, and it lists the recommended tire size and load ratings. You can also inspect the sidewall of a current or original tire for the size imprint, and consult the owner’s manual for factory specifications. If you are unsure, a reputable vintage-car tire dealer or restoration shop can measure wheel width and confirm the safest, most authentic option for your car.
Notes for restorations and upgrades
Restoration projects often aim to maintain visual authenticity while ensuring safe operation. If you plan to upgrade to modern tires, choose a bias-ply style or vintage-looking radial designed for classic cars, verify clearances around the fenders and suspension components, and consider aligning the tire diameter with the original to avoid speedometer errors.
Summary
For a 1948 Plymouth Special Deluxe, the typical original tire size is 6.50-16 bias-ply on 16-inch wheels. Variations exist due to replacements, wheel changes, and restorations, including occasional use of 7.50-16 or modern radial equivalents with proper adjustments. Always verify the exact size on your car via the data plate or authoritative restoration guidance to ensure proper fit and safe operation.
