1968 Vauxhall Tire Fitment Guide

1968 Vauxhall vehicles use seven sizes across three models. The Cresta uses 165R14 radial or 5.90-14 bias-ply, the Viscount uses 185R14 radial or 700-14 bias-ply, and the Viva uses 5.50-12, 5.60-12, or 6.15-12 bias-ply. Cresta and Viscount both use 14-inch rims, while Viva uses 12-inch rims.

That means year and make alone are not enough for a confident choice. A Viva owner needs to stay within the 12-inch family, while Cresta and Viscount owners first need to confirm which larger saloon they have and whether the car is being kept in original-style bias-ply form or run with a radial equivalent on the same rim diameter. If your car has already been restored or modified, compare the sidewall marking on the tire now on the car to the wheel before moving ahead.

On a 1968 Vauxhall, 165R14 is a metric radial size. The 165 refers to a nominal section width of 165 millimeters, the R identifies radial construction, and 14 is the rim diameter in inches. In this older metric style, no aspect ratio is printed, and it is conventionally treated as an 80-series radial.

That size appears on the 1968 Vauxhall Cresta and gives buyers a radial option without changing away from a 14-inch wheel. It is useful for owners who want a tire that stays visually appropriate to the period but is built in radial construction rather than classic bias-ply form. When comparing products in this size, pay attention to the sidewall marking and the acceptable rim-width range for the exact tire you choose.

No, 1968 Vauxhall models do not share one universal tire size. The Viva uses only 12-inch bias-ply sizes, while the larger Cresta and Viscount use 14-inch tires and each has its own pair of size choices. Even among the two larger cars, the Cresta uses 165R14 or 5.90-14, while the Viscount uses 185R14 or 700-14.

That model split matters because a larger Vauxhall saloon tire should not be treated as interchangeable with a Viva tire simply because the year and make match. The practical path is to identify the model first, then decide whether you are matching an original-size bias-ply setup or moving within that model's radial alternative where one exists. That approach avoids confusion between cars that share styling cues but not wheel diameter or tire family.

For a 1968 Vauxhall Cresta, the choice between 165R14 and 5.90-14 is mainly a choice between radial and bias-ply construction on a 14-inch rim. The 165R14 is a metric radial offered in blackwall form by Pirelli, Michelin, and Vredestein, while 5.90-14 is the traditional numeric bias-ply size associated with late-1960s original fitment practice.

Owners pursuing factory-style presentation generally lean toward the bias-ply size, while owners planning more regular road use often prefer the radial alternative because it keeps the car in a period-appropriate 14-inch format with a later construction style. The important step is to make that decision deliberately rather than mixing expectations, since the car's look, steering feel, and restoration direction can change with the construction choice even when rim diameter does not.

Sidewall style depends on the 1968 Vauxhall model and size. The 165R14 radial used on Cresta appears in blackwall form, the 185R14 radial used on Viscount is available in both blackwall and narrow whitewall styles, and the 700-14 bias-ply used on Viscount is also available in blackwall and narrow whitewall versions. The 12-inch Viva sizes stay within a more traditional compact-car bias-ply category.

That gives Viscount owners the widest appearance choice, especially if they want a more formal late-1960s saloon presentation. Cresta owners looking at 165R14 stay with a blackwall radial look, which is often appropriate for a cleaner European appearance. If show authenticity matters, sidewall style should be checked against period photos, market-specific brochures, and the standards used by the club or event judging your car.

1968 Vauxhall fitments are covered by several well-known brands depending on size. The 165R14 radial is available from Pirelli, Michelin, and Vredestein; the 185R14 radial is available from Michelin, Phoenix, and Vredestein; and the 700-14 bias-ply is available from BFGoodrich. Those brand choices span both European-style radial offerings and classic-style bias-ply construction.

Brand choice matters most after the model and size are settled. A Cresta owner looking at 165R14 will be comparing radial personalities within one size family, while a Viscount owner may first need to choose between 185R14 radial and 700-14 bias-ply before brand enters the picture. It is also worth comparing sidewall style, rim-width compatibility, and load or pressure markings for the exact product rather than choosing by brand name alone.

Rim-width guidance is available for the 14-inch radial and bias-ply sizes used on 1968 Vauxhall saloons. In 165R14, Michelin fits 4.50 to 6.00 inches and Vredestein fits 4.0 to 5.5 inches. In 185R14, Michelin fits 4.00 to 6.50 inches or 4.5 to 6.5 inches depending on version, and Vredestein fits 4.5 to 6.0 inches. In 700-14 bias-ply, BFGoodrich fits 5.00 to 5.50 inches.

Those ranges show why the wheel itself should be confirmed before choosing among products, even within the correct tire size. A tire may be right in diameter and construction but still prefer a narrower or wider rim than another product in the same size. If your wheel width has never been verified, measuring it is a better approach than assuming all 14-inch Vauxhall wheels are identical across Cresta and Viscount applications.

Inner-tube status depends on the exact 1968 Vauxhall tire product and size. Michelin 165R14 and Michelin 185R14 are marked TL, indicating tubeless construction, while other radial offerings in those sizes are not all marked the same way in the sidewall description. The 700-14 bias-ply products do not carry a TL marking in the size description, so tube requirements should be confirmed against the exact tire and wheel combination being used.

That makes wheel condition and wheel design part of the decision, especially on older cars that may still wear original rims. A tubeless-capable tire can still require extra attention if the wheel is not suited to tubeless service, and a reproduction bias-ply setup may follow different practice than a modern radial. Checking the sidewall marking on the specific tire and matching it to the wheel you actually have is more reliable than treating all 1968 Vauxhall tires the same.

Some 1968 Vauxhall models can use both of their tire-size choices on the same wheel diameter, but only within that model family. The Cresta's 165R14 and 5.90-14 both fit 14-inch rims, and the Viscount's 185R14 and 700-14 also fit 14-inch rims. The Viva is separate, using 12-inch bias-ply sizes rather than 14-inch saloon tires.

Rim diameter compatibility does not automatically mean every wheel width is ideal for every tire in that model's range. Before changing from bias-ply to radial, or from one radial brand to another, compare the wheel's actual width with the rim-width range recommended for the exact tire. That is especially important on restored cars, where wheels may have been swapped over the years even though the car still appears outwardly stock.

A stored 1968 Vauxhall should be kept out of direct sunlight, away from ozone sources such as electric motors or battery chargers, and on a dry surface rather than bare earth. Tire pressures should be kept up during storage, and the car should either be moved periodically or supported in a way that reduces prolonged static loading. Bias-ply tires tend to take temporary flat spots more readily than radials when they sit for long periods.

That matters on a 1968 Vauxhall because the range mixes radial and bias-ply fitments depending on model and owner preference. A Viva on small bias-ply tires may feel the effects of long idle periods differently than a Cresta or Viscount on radials. Clean, cool storage and regular attention usually do more for long-term tire condition than low annual mileage alone, especially for cars that spend most of the year parked.

On a 1968 Vauxhall, tire age is usually more important than tread wear because collector cars often cover limited miles. A sensible rule is to begin evaluating tires closely once they are around five to seven years old and to treat ten years as a point where replacement deserves serious consideration regardless of remaining tread. The DOT date code or equivalent date marking is the key reference.

That guideline applies whether the car runs a 12-inch Viva bias-ply setup or a 14-inch Cresta or Viscount radial. Older tires can look acceptable at a glance but still harden, crack, or lose reserve strength with time. If the age is uncertain, or the car has been sitting through multiple owners, replacing old tires is often the most meaningful single improvement you can make before returning a vintage Vauxhall to regular road use.

Tires on a 1968 Vauxhall should be checked before every drive and inspected more thoroughly before any longer outing. Look for sidewall cracking, cuts, bulges, irregular tread wear, and pressure loss, and make sure the tires have not developed age-related hardening. Any tube-type arrangement also deserves a close look at valve stems and hardware condition.

Frequent inspection is especially important on collector cars because long storage periods can age tires without adding mileage. A short local drive in a Viva may not expose the same issues as a sustained highway run in a larger Cresta or Viscount, so inspection should match the intended use that day. The spare should be included as well, since older spares are often forgotten until the moment they are actually needed.

A 1968 Vauxhall Cresta would have been associated with period bias-ply practice when new, and 5.90-14 is the classic numeric bias-ply size tied to that model. The same car is also covered by 165R14 radial, which reflects the wider late-1960s transition toward radial fitments in European-market vehicles. Original-equipment brand should be confirmed through factory literature or marque specialists rather than assumed from current reproduction offerings.

For restoration work, the important distinction is whether your goal is factory-style authenticity or a road-use update that still respects the car's original 14-inch wheel format. A concours-minded Cresta owner will usually focus first on size, construction, and sidewall appearance, while a driver may accept the radial alternative. If the car is judged in a strict class, club experts and period brochures are the best source for market-specific confirmation.

Correct tire fitment matters on a 1968 Vauxhall because show judging often considers size, construction type, and sidewall appearance as part of the car's overall authenticity. A Viva wearing the wrong wheel diameter, a Viscount using a sidewall treatment that clashes with its period presentation, or a saloon judged for originality but fitted with a modern radial in place of a classic bias-ply can all draw attention.

How much it matters depends on the event. Some local shows are relaxed, while marque judging and higher-level concours standards can be much stricter about details that affect stance and period correctness. Matching the tire to the model first, then choosing the sidewall style and construction that suit the class, is the safest approach. Event organizers and Vauxhall clubs can help clarify what their judges expect before the car appears on the field.

A 1968 Vauxhall Viva belongs to the compact end of the range and uses small-diameter 12-inch bias-ply sizes: 5.50-12, 5.60-12, and 6.15-12. For a car of this period and class, bias-ply construction is the historically appropriate starting point. The exact size within that family should match the particular Viva application rather than being chosen as a generic 12-inch substitute.

That makes the Viva different from the larger Cresta and Viscount, which introduce 14-inch choices and radial alternatives. If originality is the goal, staying within the proper 12-inch numeric bias-ply family preserves the compact proportions and stance that define the model. Owners sorting out a long-restored or imported car should compare the wheel diameter and existing sidewall marking, then confirm the exact application through factory references or Vauxhall enthusiast sources.

1968 Vauxhall tires can be suitable for highway use when the size, condition, and construction match the car and the driver's expectations. The 165R14 and 185R14 radial offerings include H-rated versions, which carry a 130 mph speed ceiling, far beyond normal highway speeds. The 12-inch Viva bias-ply sizes and the 700-14 Viscount bias-ply size should be approached with the understanding that vintage bias-ply behavior differs from a modern radial even when the tire itself is in sound condition.

On a car of this age, overall road safety is influenced by more than the tire alone. Brakes, steering, suspension, and alignment all shape how confidently the car behaves at speed, and those systems may limit real-world touring pace more than the tire's published rating. A well-maintained Cresta or Viscount on correct radials may feel different on the highway than one on bias-ply tires, so matching the tire to the intended use matters as much as the headline speed symbol.

Inflation pressure for a 1968 Vauxhall should start with the factory recommendation for the specific model, then be checked against the reproduction tire's own rating details. Some current products include load-and-pressure figures, such as 165R14 at 1,102 pounds at 51 psi, 185R14 at 1,323 pounds at 35 psi or 1,323 pounds at 51 psi depending on product, and 700-14 at 1,360 pounds at 32 psi. Those figures are product capacities, not universal instructions for every 1968 Vauxhall tire.

The practical takeaway is not to transfer one pressure number from one size to another, or from one product line to another, just because the car family is similar. Tire construction, load rating, and intended wheel all affect the right setup. Use the vehicle handbook as the baseline for your model, then compare it with the tire manufacturer's marking and adjust within that context rather than inflating strictly to the tire's maximum-capacity pressure.

Before a longer trip in a 1968 Vauxhall, inspect each tire for cracking, cuts, bulges, tread separation, uneven wear, and proper inflation. Check valve stems carefully, and if the car uses a tube-type arrangement, treat the valve area and any signs of air loss as a priority. The spare should also be inflated and old enough to trust, not simply present in the trunk.

A longer drive also deserves a broader mechanical once-over, especially on a late-1960s car. Wheel bearing play, brake function, suspension condition, and steering response all interact with tire behavior on the road. A Viva on 12-inch bias-ply tires and a Viscount on 14-inch radials may ask different things from the driver, but both benefit from the same careful pre-trip mindset: confirm the basics at home rather than discovering a preventable problem on the roadside.