Plymouth ROAD Tires — Fitment by Year

The Plymouth Road Runner (1968–1970) is a classic American muscle car built around a simple premise: maximum performance at a practical price. Originally equipped with large-displacement V8 engines and a lightweight body, the Road Runner demands tire choices that respect both its era and its performance intent. Whether you're restoring one to driver-quality condition, building a weekend cruiser, or keeping it on the street with modern reliability, tire selection plays a direct role in how the car behaves, looks, and feels.

Tires for this generation Road Runner fall into a few categories depending on your use case. Factory-era fitments were bias-ply tires, but the overwhelming majority of owners today run radial construction for better handling, longer tread life, and improved ride quality. Common rim diameters on these cars run in the 14–15 inch range on stock wheels, though many owners have upgraded to 17 or 18 inch aftermarket wheels. Always verify the specific rim size and width on your vehicle before selecting a tire, since wheel combinations vary widely across model years and prior owner modifications.

For a street-driven Road Runner, a performance all-season or a dedicated summer performance tire in the appropriate aspect ratio will deliver the most balanced experience. High-performance summer tires offer better grip in warm conditions but should be swapped out or stored in climates with harsh winters. If the car sees year-round driving in a northern climate, a dedicated winter tire mounted on a separate set of wheels is the most practical approach — all-season tires are a compromise, and classic muscle cars with rear-wheel drive require extra caution in cold or wet conditions regardless of tire choice.

Sidewall height is worth careful consideration on a vehicle like this. A taller sidewall — higher aspect ratio — provides a more period-correct appearance and adds a small cushion of compliance over the Road Runner's relatively firm suspension. Lower-profile tires on larger-diameter wheels can sharpen steering response but may look out of place on a classic build and can expose wheels to road hazard damage more easily. Load rating should be appropriate for the vehicle's actual weight; consult your tire sidewall and vehicle documentation to confirm the minimum load index required per axle.

Treadwear rating is another practical consideration. A tire with a very low treadwear rating — common on max-performance summer tires — may offer excellent grip but will wear quickly if the car is driven regularly rather than used only at shows or occasional weekend trips. Balancing grip, longevity, and ride quality is the core tradeoff for most Road Runner owners. UTQG ratings printed on the sidewall give you a standardized reference point for comparing tires across those dimensions.

Because this vehicle spans three model years with variations in trim, axle, and wheel fitment, exact size recommendations depend on your specific configuration. Measure your current rim diameter, width, and check the existing tire sidewall for the mounted size before ordering. If the car has been modified — lowered, lifted, or fitted with aftermarket wheels — those changes affect which tire sizes will clear the fenders and suspension without rubbing. When in doubt, verify fitment against your actual wheel and suspension setup rather than relying solely on year/model lookup tables.