1966 Plymouth Tire Fitment Guide

1966 Plymouth vehicles use seven bias-ply sizes across four model lines: 650-13, 700-13, and 695-14 for Barracuda and Valiant; 735-14, 775-14, and 825-14 for Belvedere and Fury; and 855-14 for Fury only. The compact cars span both 13-inch and 14-inch rim applications, while Belvedere and Fury stay in 14-inch sizes. Rim width ranges vary by size, including 4.00-5.00 and 4.50-5.00 inches for the 13-inch sizes, 5.00-6.00 inches for several 14-inch sizes, 5.00-5.50 inches for 735-14, and 5.50-6.00 inches for 855-14.

That means year and make alone are not enough to pick a tire for a 1966 Plymouth. Start by identifying the model, then confirm whether the car currently has 13-inch or 14-inch wheels, and finally compare the wheel width to the range for the exact size you want to run. A Barracuda or Valiant may accept more than one period-style size depending on wheel choice, while a Fury owner also needs to distinguish between the more common 14-inch full-size sizes and the Fury-only 855-14.

On a 1966 Plymouth, 650-13 is a numeric bias-ply tire size. In that older sizing system, the first number is the nominal section width designation and the 13 identifies the rim diameter in inches. For 1966 Plymouth use, 650-13 appears on Barracuda and Valiant applications and fits 13-inch wheels with a 4.50-5.00 inch rim width range in the available products.

That decoding matters because 650-13 is not interchangeable with the 14-inch options used elsewhere in the lineup. If your Barracuda or Valiant is wearing 13-inch wheels and you want a compact, era-correct bias-ply fitment, 650-13 is one of the key sizes to compare against 700-13. The next step is to check whether you prefer a narrow or wide whitewall presentation and make sure the wheel width falls within the tire's approved range.

No, 1966 Plymouth models do not all use the same tire size. Barracuda and Valiant share 650-13, 700-13, and 695-14; Belvedere and Fury share 735-14, 775-14, and 825-14; and Fury alone adds 855-14. Every size in this range is bias-ply, but the actual dimensions and wheel diameters change with the model family.

The practical takeaway is that identifying the model is essential before moving on to sidewall style or brand preference. A compact A-body Plymouth and a full-size Fury may both be 1966 Plymouth vehicles, yet they live in different parts of the size range and, in some cases, on different wheel diameters. If the car has been restored or modified over the years, it is wise to verify the wheel on the car now rather than relying only on the badge or body style.

1966 Plymouth tires are available in several sidewall styles depending on size. 650-13 comes in wide whitewall and narrow whitewall, 700-13 in wide whitewall, 695-14 in blackwall, narrow whitewall, and dual-redline, 735-14 in blackwall and narrow whitewall, 775-14 in narrow whitewall and redline, 825-14 in blackwall and narrow whitewall, and 855-14 in narrow whitewall. That gives a broad spread of visual choices within the original bias-ply character of the period.

Sidewall style often matters as much as size on a mid-1960s Plymouth because it changes the car's whole presentation. A blackwall or redline usually suits a sportier look, while narrow and wide whitewalls lean more toward upscale or mainstream period styling depending on the model and market personality. For a restoration, match the sidewall treatment to the way your specific car would have been delivered or judged, then choose the exact size that belongs to the model.

1966 Plymouth tire sizes are covered by Coker Classic, US Royal, Firestone, and BFGoodrich. The smaller 650-13 size is available from Coker Classic and US Royal, 700-13 from Firestone, 695-14 from BFGoodrich and US Royal, 735-14 from BFGoodrich, 775-14 from US Royal, BFGoodrich, and Firestone, and 825-14 plus 855-14 from BFGoodrich. Every size in the range remains a bias-ply offering, which keeps the choices aligned with the period construction Plymouth originally used.

Brand choice for a 1966 Plymouth usually comes down to getting the right combination of size, sidewall treatment, and period flavor rather than chasing a completely different tire architecture. Some sizes have broad brand coverage and others are more concentrated, so it helps to start with the correct size first and then compare the visual details available within that size. That approach keeps the buying decision organized and prevents you from falling in love with a sidewall style that is not offered in your model's tire size.

For the 1966 Plymouth 695-14 size, BFGoodrich and US Royal both offer bias-ply narrow whitewall versions with the same stated load capacity of 1230 pounds at 32 psi and the same 14-inch rim diameter with a 5.00-6.00 inch rim width range. BFGoodrich also brings blackwall and dual-redline versions in the same size, while US Royal centers on the narrow whitewall presentation. Weights are close as well, with BFGoodrich versions around 19 to 20 pounds and the US Royal narrow whitewall at 21 pounds.

That means the biggest difference is visual character rather than a dramatic fitment change. If your 1966 Plymouth Barracuda or Valiant needs 695-14 and you want more sidewall styling flexibility, BFGoodrich opens up blackwall and redline-style choices; if you want a straightforward whitewall presentation, US Royal remains in the mix with comparable load and wheel requirements. Choose the one that matches the car's intended look first, then confirm wheel width and overall restoration goals.

Rim width depends on the exact tire size used on the 1966 Plymouth. Available fitments show 650-13 on 4.50-5.00 inch rims, 700-13 on 4.00-5.00 inch rims, 695-14 on 5.00-6.00 inch rims, 735-14 on 5.00-5.50 inch rims, 775-14 on 5.00-6.00 or 5.50-6.00 inch rims depending on product, 825-14 on 5.00-6.00 inch rims, and 855-14 on 5.50-6.00 inch rims. The wheel diameter also changes by size, with 13-inch and 14-inch applications both present in the compact Plymouth range.

That range is why measuring the actual wheel matters before committing to a tire. A size may belong to your model line, but the wheel on the car still needs to fall within the approved width range for the specific tire you choose. This is especially important on cars that may have been swapped from 13-inch to 14-inch wheels or from one 14-inch size to another over the years, because appearance alone does not tell the whole story.

The available 1966 Plymouth products do not carry tube-type or tubeless markings in the size descriptions here, so the practical approach is to treat tube use as a wheel-and-product confirmation step rather than a blanket rule for every tire in the range. All of the sizes involved are bias-ply, and many collector cars from this era may still be running original-style steel wheels whose condition can influence whether tubes are appropriate.

Before fitting tires to a 1966 Plymouth, inspect the wheels closely for corrosion, pitting, weld repairs, or other issues that could affect air retention. Then match the wheel condition and the intended tire to the specific sidewall marking on the product you are considering. If the car is being restored for authenticity, tube practice may also depend on how original the wheel setup remains, so a marque specialist or experienced installer can help settle the final combination.

Original 1966 Plymouth wheels cannot be assumed to work with all tire sizes across the whole make because the lineup spans both 13-inch and 14-inch diameters and several different rim-width requirements. Barracuda and Valiant can use 13-inch sizes such as 650-13 and 700-13 or a 14-inch size such as 695-14, while Belvedere and Fury stay in 14-inch applications, with Fury reaching as large as 855-14. Rim width ranges also shift from one size to another.

The safer rule is to match wheel diameter first, then compare the wheel's actual width to the approved range of the tire size you want. Even within the 14-inch family, a wheel suitable for 735-14 may not be the ideal home for a larger 855-14. If your car has changed hands several times or has seen wheel swaps over the decades, measuring the wheel and checking the stamping is more reliable than assuming the current setup is original.

A stored 1966 Plymouth should sit in a cool, dry, dark place away from direct sunlight, electric motors, battery chargers, furnaces, and other ozone-producing sources that can age rubber. Keep the tires clean, maintain proper inflation, and move the car periodically if possible so the carcass is not holding one static load position for months at a time. Because every tire size here is bias-ply, flat-spotting during long periods of rest is a more familiar behavior than many owners experience with modern radials.

If the car will be down for a full season or longer, some owners reduce stress by using stands under the suspension or rolling the car occasionally rather than letting all weight remain on one patch of tread. Avoid parking on bare earth or surfaces that stay damp, and do not cover tires with materials that trap moisture. Those habits help preserve both the rubber and the visual finish that matters on a collector Plymouth.

On a 1966 Plymouth, tire age is usually more important than mileage because collector cars often see limited annual use. A sensible rule is to begin evaluating tires carefully once they are around five to seven years old and to treat about ten years from the date code as a serious replacement threshold, even if the tread still looks good. Bias-ply tires can appear serviceable while still aging internally from time, heat cycles, and storage conditions.

The best habit is to read the DOT date code on each tire and keep a simple log with installation date, pressure checks, and any visible changes. If the car has spent years indoors, that can help, but indoor storage does not stop rubber from aging. On a low-mileage 1966 Plymouth, replacing an old-looking or old-dated tire before it fails is usually far cheaper and easier than dealing with body damage or roadside trouble afterward.

Tires on a 1966 Plymouth should be inspected before every drive, with a more thorough check before any extended outing or event. Look for sidewall cracking, cuts, bulges, uneven wear, low inflation, and any sign that the tire is not holding pressure consistently. Since these are vintage-style bias-ply applications, it is also smart to watch for age-related changes in ride feel, steering response, or vibration that can signal a tire issue before a defect becomes obvious.

A monthly inspection routine works well even when the car is not being driven much. Check all four tires plus the spare, and if your wheel setup uses tubes or older valve hardware, include the valve stems and caps in the inspection. Catching a cracked sidewall or slowly leaking assembly in the garage is much easier than discovering it after the car has warmed up at speed on a long trip.

A 1966 Plymouth Barracuda would have been fitted with bias-ply tires when new, which matches the construction used across the available Barracuda sizes today. The sizes associated with the 1966 Plymouth Barracuda are 650-13, 700-13, and 695-14, depending on the wheel and application. Sidewall presentation in the era could vary as well, so blackwall, whitewall, or sportier treatment should be matched to the specific car rather than assumed from the model name alone.

For a restoration, the safest path is to confirm the wheel diameter on the car and then compare period photos, factory literature, and marque-club guidance for the exact body style and market presentation you want to recreate. Construction matters because a radial on a car judged for factory authenticity can stand out immediately. Brand name matters less than getting the size, stance, and sidewall character right unless you are working to a very strict concours standard.

Correct tire fitment absolutely matters when showing a 1966 Plymouth, especially in classes that emphasize factory-style presentation. Judges and knowledgeable enthusiasts often notice whether the tire size matches the model family, whether the construction suits the period, and whether the sidewall style fits the way the car would have appeared when new. On a 1966 Plymouth, an A-body Barracuda or Valiant wearing a full-size Fury-only size would look wrong even before anyone checked deeper details.

That does not mean every event uses the same standard, so it is wise to tailor the tire choice to the level of authenticity your car is being built around. A local cruise-night car has more freedom than a serious concours entry, but the size still needs to belong on the model. If judging matters, compare your chosen tire with period photos and ask Plymouth marque experts what a specific event tends to reward or penalize.

For the 1966 Plymouth 775-14 size, BFGoodrich and Firestone both offer bias-ply tires with the same stated load capacity of 1580 pounds at 32 psi on the versions where that figure appears. Firestone offers a narrow whitewall on a 5.00-6.00 inch rim width range, while BFGoodrich offers both a narrow whitewall and a redline, each on a 5.50-6.00 inch rim width range. Weight is close, with BFGoodrich around 22 to 23 pounds and Firestone at 23 pounds.

That makes the choice largely a matter of sidewall style and wheel compatibility. A Belvedere or Fury owner who wants a sportier mid-1960s visual cue may lean toward the BFGoodrich redline, while a more traditional whitewall presentation can come from either BFGoodrich or Firestone. Before settling on one, verify whether your wheel is closer to the 5.00-inch or 5.50-inch end of the range so the tire and wheel work together as intended.

1966 Plymouth tire offerings here are all bias-ply designs, and no explicit speed ratings appear in the available size markings. In practical terms, a properly fitted, correctly inflated, fresh-condition bias-ply tire can be suitable for normal road use, but it will not feel the same as a modern radial in tracking, lane-following, or response to pavement grooves. On a mid-1960s Plymouth, the car's own braking, steering, suspension, and overall mechanical condition often matter just as much as the tire when planning highway use.

Safety on the highway starts with realism about the vehicle's age and the behavior of vintage tire construction. If your 1966 Plymouth will spend time on faster roads, inspect the tires carefully, keep them at the proper pressure for the application, and build speed gradually rather than treating a collector car like a modern commuter. A bias-ply Plymouth in good tune can cruise comfortably, but the whole car should be prepared and driven with period-correct expectations.

Maximum load-and-pressure figures for 1966 Plymouth tire sizes include 1150 pounds at 32 psi for 650-13, 1270 pounds at 32 psi for 700-13, 1230 pounds at 32 psi for 695-14, 1360 pounds at 32 psi for 735-14, 1580 pounds at 32 psi for many 775-14 versions, 1620 pounds at 32 psi for 825-14, and 1740 pounds at 32 psi for 855-14. Those numbers describe the tire's rated capacity at that pressure, not automatically the exact pressure every Plymouth should run in service.

For day-to-day use, start with the vehicle manufacturer's recommended pressure from the owner's manual or factory literature for your specific model, then make sure it stays within the tire maker's limits for the exact product. Do not transfer a pressure figure from one size to another just because both fit the same year and make. A compact Valiant and a full-size Fury place different demands on their tires, so inflation should follow the correct model-and-size combination.

Before a longer drive in a 1966 Plymouth, inspect each tire for cracks, cuts, bulges, abnormal wear, and proper cold inflation pressure. Check that the spare is usable, that the valve stems are in good shape, and that each wheel is free from obvious damage or severe corrosion. Since these cars use bias-ply tire sizes and may have sat for stretches between outings, it is also worth paying attention to any vibration, pull, or thump during the first few miles.

A tire check should be part of a broader pre-trip inspection on any 1966 Plymouth. Confirm the brakes, steering, suspension, wheel bearings, lights, and fluid levels, then give the car a short local test drive before heading farther from home. Longer trips are much more enjoyable when the tire condition has already been verified and the rest of the chassis has been checked with the same care as the engine.