The 1975 Plymouth Valiant came from the era when compact domestic sedans were expected to be durable, straightforward, and economical, yet still carry distinct Mopar character. For owners preserving one today, tire choice has a big influence on both appearance and road manners. This Valiant uses 14-inch bias-ply fitments, with 695-14, D78-14, and E78-14 sizes appearing across the covered engine configurations. That opens the door to period-style choices ranging from blackwall and narrow whitewall to dual redline, with radial equivalents also available for some sizes. The right decision starts with the exact engine-based sub-model, then moves to construction, sidewall style, and wheel compatibility.
Which Tire Size Is Right for The 1975 Plymouth Valiant
Three primary tire sizes apply to the 1975 Plymouth Valiant, and the correct one depends on the exact engine-based sub-model. All of them are bias-ply tires built for 14-inch rims, so the first step is confirming whether the car is a w/225 Eng. or w/318 Eng. configuration. Once that is settled, the decision shifts to sidewall style, tire series, and whether a radial equivalent is worth considering for the sizes that have one.
In a numeric bias-ply size like 695-14, the 6.95 designation refers to the tire's nominal section width in inches, while 14 identifies the rim diameter. On the 1975 Plymouth Valiant, this is a traditional bias-ply fitment used on a 14-inch wheel and suits buyers who want a distinctly vintage driving and visual presentation. Available choices include BFGoodrich, US Royal, and Goodyear products in series such as Silvertown Classic Bias Ply, US Royal Classic Bias Ply, Blue Streak, and Power Cushion, with blackwall, narrow whitewall, dual redline, and raised white letter styles. It is a useful starting point for a restoration-oriented car where period-style size and sidewall choice matter.
A vintage alphanumeric bias-ply size such as D78-14 uses the letter to indicate the tire's size class, the 78 to denote its profile family, and 14 for the rim diameter. For the 1975 Plymouth Valiant, this is a 14-inch bias-ply fitment that appears across both covered engine configurations, making it an important size to verify when the car's original wheel and tire setup is being retained. Its main relevance is fitment identification rather than broad style choice on this page. Buyers should confirm that the car still has the expected wheel setup before using D78-14 as the basis for replacement.
In the size code E78-14, the letter marks the tire's relative size class, the 78 identifies the profile family, and the 14 indicates a 14-inch rim. This is a bias-ply fitment for the 1975 Plymouth Valiant and is associated with the w/318 Eng. configuration, so it should not be treated as universal across every Valiant. Available choices include Coker Classic and STA products, with options in Coker Classic Bias Ply, Traxion, and Transport Highway series and blackwall or wide whitewall styling. It is the size to evaluate when a Valiant needs the larger of the covered 14-inch fitments and the wheel setup has been confirmed.
Tire fitment for the 1975 Plymouth Valiant varies by engine-based sub-model rather than staying uniform across the range. Checking whether the car is a w/225 Eng. or w/318 Eng. version matters first, because that determines which of the 14-inch bias-ply sizes belongs on the car.
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1975 Plymouth Valiant w/225 Eng.
The 1975 Plymouth Valiant w/225 Eng. uses 14-inch bias-ply sizing centered around the smaller covered fitments, including 695-14 and D78-14. That makes this sub-model a good candidate for buyers focused on period-style bias-ply replacement, sidewall appearance, or radial-equivalent evaluation where the selected primary size supports it.
The 1975 Plymouth Valiant w/318 Eng. uses 14-inch bias-ply sizing that includes D78-14 and the larger E78-14 fitment. Tire selection here starts with confirming which of those sizes is on the car now, then narrowing the choice by intended look, construction preference, and wheel compatibility.
Bias-Ply to Radial Tire Conversion for the 1975 Plymouth Valiant
Radial equivalents are available for two of the primary 1975 Plymouth Valiant tire sizes. For 695-14, the options are 175R14 as an 80-series metric radial, P185/75R14 as a 75-series P-metric radial, and P195/70R14 as a 70-series P-metric radial. For E78-14, the equivalents are 185R14, P195/75R14, and P205/70R14 in those same categories. These choices span more traditional metric sizing and lower-profile P-metric alternatives, with a recommended rim-width range of 4 to 6 inches, so wheel size, dimensions, and clearance should still be checked carefully.
Modern Radial Equivalents
175R14
Equivalent 80-series Metric Radial (695-14)
P185/75R14
Equivalent P-metric 75-series Radial (695-14)
P195/70R14
Equivalent P-metric 70-series Radial (695-14)
185R14
Equivalent 80-series Metric Radial (E78-14)
P195/75R14
Equivalent P-metric 75-series Radial (E78-14)
P205/70R14
Equivalent P-metric 70-series Radial (E78-14)
Important Considerations When Replacing Bias Ply With Radial
Compare overall diameter and section width carefully to ensure proper fit.
Verify recommended rim range (4-6 in) and load needs match your vehicle specifications.
Check fender clearance, steering clearance, and stance before installation.
Consider suspension condition and intended road use when choosing equivalents.
Important Fitment Notes
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Best 1975 Plymouth Valiant Tires for Sale
Available 14-inch bias-ply choices for the 1975 Plymouth Valiant include BFGoodrich, US Royal, Goodyear, Coker Classic, and STA offerings across Silvertown Classic Bias Ply, US Royal Classic Bias Ply, Blue Streak, Power Cushion, Traxion, and Transport Highway series. Sidewall treatments range from blackwall and narrow whitewall to dual redline, raised white letter, and wide whitewall.
These FAQs focus on the exact tire sizes used on the 1975 Plymouth Valiant, how the engine-based sub-models affect fitment, what the available radial equivalents mean, and what to inspect before putting a collector-era Valiant back on the road.
Tire Size & Fitment
What tire size fits a 1975 Plymouth Valiant?
The 1975 Plymouth Valiant uses 695-14, D78-14, and E78-14 tire sizes, all in bias-ply construction on 14-inch rims. The exact size depends on the sub-model, with the w/225 Eng. configuration using 695-14 or D78-14, and the w/318 Eng. configuration using D78-14 or E78-14.
The practical question is not simply whether the car is a 1975 Valiant, but which engine-based configuration it is and whether the wheels are still the expected 14-inch setup. A car that has been changed over to different wheels or a different replacement size should be inspected before ordering, especially when moving between numeric and alphanumeric vintage sizes.
What size rim does a 1975 Plymouth Valiant use?
The covered tire fitments for the 1975 Plymouth Valiant all use a 14-inch rim diameter. That applies across 695-14, D78-14, and E78-14, so the wheel diameter stays consistent even though the actual tire size can vary by sub-model.
Rim diameter is only one part of fitment, so it helps to confirm wheel width as well before making a final tire choice. That becomes especially important if the car has aftermarket wheels, if a radial equivalent is being considered, or if the current wheels may not match the original-style setup the Valiant is supposed to have.
Do all 1975 Plymouth Valiant sub-models use the same tire size?
No. The 1975 Plymouth Valiant has sub-model fitment variation. The w/225 Eng. configuration uses 695-14 or D78-14, while the w/318 Eng. configuration uses D78-14 or E78-14, so one shared size exists, but the full fitment is not identical across both versions.
That means the exact sub-model matters before selecting tires, especially if the car is being restored or returned to a more period-style presentation. It is also wise to compare the current tire size already on the car, since older vehicles sometimes carry replacement tires that differ from the size that best matches the intended wheel and appearance.
Bias-Ply & Radial Options
Is 695-14 a bias-ply or radial tire for the 1975 Plymouth Valiant?
For the 1975 Plymouth Valiant, 695-14 is a bias-ply primary tire size. It is one of the traditional 14-inch fitments associated with the w/225 Eng. configuration and is available in several period-style bias-ply product lines and sidewall treatments.
That matters because a buyer deciding on 695-14 is really choosing whether to stay with the original-style construction or explore one of the available radial equivalents. Keeping a bias-ply maintains the vintage sizing format and look, while any move to radial should include a check of wheel width, tire dimensions, and fender or steering clearance on the actual car.
What radial tire sizes are equivalent to 695-14?
Radial equivalents for 695-14 include 175R14 as an 80-series metric radial, P185/75R14 as a 75-series P-metric radial, and P195/70R14 as a 70-series P-metric radial. These are the modern radial alternatives associated with that primary bias-ply size for the 1975 Plymouth Valiant.
Those options give different sizing conventions and profile families rather than one automatic substitute, so the wheel and vehicle setup still need to be checked carefully. A recommended rim-width range of 4 to 6 inches is associated with these equivalents, and clearance around steering, suspension, and bodywork should be confirmed before changing construction.
What should I check before converting my 1975 Plymouth Valiant from bias-ply to radial tires?
Start by confirming the Valiant's actual primary tire size, then match any radial alternative to that size rather than choosing by appearance alone. For this car, radial equivalents are available for 695-14 and E78-14, and the common points to review are wheel diameter, wheel width, and the overall space available around the tire.
A conversion also deserves a close look at suspension condition, steering clearance, and whether the car still wears its expected wheels. Cars with older replacement rims, changed ride height, or other modifications may need extra measurement before a radial is selected, even when the radial is a recognized equivalent for the original bias-ply size.
Choosing the Right Tire
What should I consider when choosing a 695-14 tire for a 1975 Plymouth Valiant?
Choosing a 695-14 tire starts with making sure that size actually belongs on the car's sub-model, since it is associated with the 1975 Plymouth Valiant w/225 Eng. configuration. After size is confirmed, the main decisions are brand, tire series, sidewall treatment, and whether the goal is a conservative sedan look or a more distinctive period-style presentation.
This size is available in blackwall, narrow whitewall, dual redline, raised white letter, and Blue Streak-style treatments from BFGoodrich, US Royal, and Goodyear. Rim-width details and load specifications can also help narrow the field, particularly when the Valiant has older wheels that should be measured rather than assumed to match the original setup.
What sidewall styles are available for 1975 Plymouth Valiant tires?
Sidewall choices for 1975 Plymouth Valiant tires include blackwall, narrow whitewall, dual redline, raised white letter, raised white letter with blue stripe, and wide whitewall depending on the size selected. Those styles are spread across the available 695-14 and E78-14 product offerings, so appearance can vary quite a bit even within correct 14-inch bias-ply fitment.
The best sidewall choice depends on how the car is being presented. A plain blackwall keeps the look understated, while whitewalls or redlines create a more intentional period impression. It helps to choose the sidewall only after the correct size is confirmed, since not every style appears in every Valiant fitment covered on this page.
What brands offer tires for the 1975 Plymouth Valiant?
Available brands for 1975 Plymouth Valiant tire sizes include BFGoodrich, US Royal, Goodyear, Coker Classic, and STA. The mix depends on the tire size, with 695-14 carrying the broadest assortment and E78-14 offering a smaller but still distinct range of bias-ply options.
Brand selection works best when it is tied to the exact size and look the car needs. Some buyers will focus on a traditional sedan-style whitewall, others on blackwall or redline presentation, and others on a utility-oriented bias-ply. Once the size is settled, comparing tire series, sidewall style, rim-width guidance, and load details becomes more useful than choosing by brand name alone.
Restoration & Appearance
Which tire should I choose for a period-style 1975 Plymouth Valiant?
A period-style 1975 Plymouth Valiant tire choice starts with the correct primary size for the car's sub-model, then narrows to a bias-ply tire with the sidewall treatment that suits the desired look. For this Valiant, that can mean a blackwall, narrow whitewall, dual redline, or wide whitewall depending on the applicable size.
Bias-ply construction keeps the vintage sizing format and visual character intact, which is often important on a restoration-oriented car. When exact originality matters, it is smart to compare the car against marque literature, surviving examples, or club guidance before deciding on a stripe or whitewall treatment, since a period-style option is not automatically the exact one the car wore when new.
How does tire construction affect the appearance of a restored 1975 Plymouth Valiant?
On a restored 1975 Plymouth Valiant, tire construction affects both the side profile and the overall visual character of the car. The primary fitments here are bias-ply sizes, so staying with bias-ply preserves the traditional vintage size format and supports the sidewall styles available in that construction.
A radial equivalent can change the look simply because it uses a different sizing convention and profile family, even when it serves as a recognized alternative. Buyers balancing road use and appearance often decide whether the car's priority is authentic vintage presentation, everyday drivability, or a compromise between the two before moving away from the original-style bias-ply format.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1975 Plymouth Valiant?
Yes. Modifications can affect tire fitment on a 1975 Plymouth Valiant even when the tire size itself is correct for the sub-model. Changes such as aftermarket wheels, altered wheel width, different offset, lowered suspension, or body and brake changes can all influence whether a vintage-size tire has enough room in normal driving and turning.
That is why a modified car should be measured rather than matched by year and model alone. A Valiant with non-original wheels may still use a 14-inch rim but require extra attention to tire width and clearance. Checking lock-to-lock steering room, fender space, and suspension travel before mounting tires helps avoid fitment surprises.
What should I inspect before driving a 1975 Plymouth Valiant on new tires?
Before driving a 1975 Plymouth Valiant on new tires, inspect the wheels, valve stems, lug hardware, and overall clearance around the tires. It also makes sense to look over steering and suspension components, since worn parts can affect how a fresh set of bias-ply tires tracks and how much room the tire has under load and during turns.
A basic road-readiness check should also include tire pressure, wheel fastener torque, and a careful look for rubbing after initial installation. On a collector-era car, it is wise to recheck everything after the first short drive. That helps catch issues related to wheel condition, alignment feel, or minor contact points before the car is used more regularly.
How should 695-14 tires on a collector 1975 Plymouth Valiant be maintained?
695-14 tires on a collector 1975 Plymouth Valiant should be maintained with regular pressure checks, visual inspection, and careful storage habits. Bias-ply tires on lightly used collector cars deserve extra attention because age, long periods of sitting, and environmental exposure can affect condition even when tread wear remains minimal.
A good routine includes checking for sidewall cracking, bulges, cuts, flat spotting, and gradual air loss before road use. Storage away from prolonged sunlight, heat, moisture, and ozone sources helps preserve the tires between drives. It is also sensible to inspect wheel condition and watch for any change in ride feel or vibration that suggests the tires should be examined more closely.
