1968 Bristol Tire Fitment Guide

1968 Bristol fitment centers on the Bristol 410, which uses two sizes: 195R15 and 670-15. Both sizes mount on 15-inch rims, and the 670-15 examples here span rim-width ranges of 4.50 to 5.00 inches and 5.00 to 6.00 inches depending on the tire. That means the 410 has a shared rim diameter across both sizes, while the construction format changes from radial in 195R15 to bias-ply in 670-15.

For a Bristol owner, the practical first step is confirming whether you want to stay with the bias-ply character of 670-15 or move toward the radial format of 195R15. Once that choice is made, verify the wheel's actual width before ordering, because 15-inch diameter alone does not guarantee that every tire in every size will suit every wheel equally well.

On a 1968 Bristol, 670-15 is a numeric bias-ply size. The 670 refers to the tire's nominal section width and profile convention used in period sizing, while the 15 is the wheel diameter in inches. In this year and make, 670-15 applies to the Bristol 410 and represents the traditional bias-ply fitment path rather than a modern metric radial format.

That matters because a 670-15 reads very differently from a modern metric size, even when the wheel diameter is the same. If your goal is an era-appropriate look, period sidewall appearance, or a traditional restoration approach, this is the size code that aligns most closely with that direction. Wheel width should still be checked against the exact tire selected.

On a 1968 Bristol, 195R15 is a Euro-metric radial size. The 195 is the nominal section width in millimeters, the R identifies radial construction, and the 15 is the wheel diameter in inches. Because no aspect ratio is printed in the size itself, it follows the conventional Euro-metric form used before lower-profile metric sizing became common.

For a Bristol 410 owner, 195R15 signals a different construction philosophy from 670-15 even though both fit 15-inch rims. It is the radial branch of fitment for this year and make, so it is the size to research further if you want your tire choice to reflect later radial practice rather than the older numeric bias-ply system.

For 1968 Bristol, the main difference is construction type. The 195R15 is a radial size, while the 670-15 is a bias-ply size, and both fit the Bristol 410 on 15-inch rims. That means the choice is less about whether one belongs to a different model and more about whether you want a later-style radial format or a traditional numeric bias-ply setup.

Owners restoring a 410 for a more period-focused appearance often lean toward the 670-15 because the size format and sidewall options suit a classic presentation. Owners who prioritize a radial construction within the same year-make fitment family may prefer the 195R15. Before deciding, think about how the car will be used: display, occasional touring, or regular fair-weather road miles.

1968 Bristol tire choices include both blackwall and wide whitewall sidewall styles in 670-15. Firestone and Universal Vintage Tire appear in blackwall form, while US Royal and Coker Classic appear in wide whitewall form. That gives Bristol 410 owners a meaningful visual choice within the bias-ply size itself, in addition to the broader construction choice between 670-15 and 195R15.

On a late-1960s Bristol, blackwall is typically the more restrained and naturally British-looking presentation, especially on a discreet luxury GT like the 410. A wide whitewall creates a more stylized vintage appearance and may appeal to owners building toward a particular show look. Sidewall choice affects how the whole car reads visually, so it is worth treating as more than a minor cosmetic detail.

1968 Bristol coverage includes Firestone, US Royal, Coker Classic, and Universal Vintage Tire in the 670-15 size. All four support the Bristol 410's bias-ply fitment path, with blackwall and wide whitewall variations depending on brand and series. That range gives the car access to both historically familiar names and reproduction-focused collector tire lines.

Brand choice on a Bristol often comes down to the look you want and the exact tire construction and sidewall style that best fits the character of the car. A buyer comparing options should narrow the decision in this order: size first, construction second, sidewall appearance third. That approach keeps the aesthetic decision from getting ahead of the actual fitment decision.

For 1968 Bristol, the 670-15 appears with rim-width ranges of 4.50 to 5.00 inches on some examples and 5.00 to 6.00 inches on others, all on a 15-inch rim diameter. That spread reflects differences between individual tire designs within the same nominal size rather than a change in Bristol model fitment. The Bristol 410 itself uses both 15-inch sizes in this year-make range.

The key takeaway is that a matching rim diameter is only the first checkpoint. Before fitting a 670-15, compare your wheel's actual measured width to the exact tire's approved range. That step is especially important on a low-volume car like a Bristol, where wheel originality may matter just as much as tire appearance and construction.

1968 Bristol fitment includes both a radial 195R15 and a bias-ply 670-15, but tube marking details are not carried uniformly across the available examples here. That means tube use should be confirmed on the specific tire selected rather than assumed from size alone. The wheel design itself also matters, since some older wheels and construction types are more often paired with tube-type service than others.

A Bristol owner should check the sidewall marking on the exact tire, then match that to the condition and design of the wheel being used. If the wheel has age, corrosion, or a profile better suited to tube-type installation, that can affect the final setup decision. This is one area where confirmation before mounting matters more than broad year-make guidance.

1968 Bristol uses two sizes, 195R15 and 670-15, and both share a 15-inch rim diameter on the Bristol 410. That means the original wheel diameter can align with either size. Diameter compatibility, however, is only one part of the equation, because wheel width and the tire's approved fitment range still need to match.

In practical terms, many owners can evaluate both sizes without changing wheel diameter, which simplifies the choice between radial and bias-ply construction. The next step is to measure the actual wheel width and compare it to the tire's fitment range before mounting. That is particularly worthwhile on original Bristol wheels, where preserving correctness and avoiding avoidable fitment issues both matter.

A 1968 Bristol should be stored in a cool, dry, dark space away from direct sunlight, electric motors, welders, battery chargers, and other ozone-producing equipment that can age rubber. Clean, properly inflated tires fare better during long rests, and a bias-ply tire such as 670-15 is generally more prone to temporary flat-spotting during storage than a radial when the car sits for extended periods.

If the Bristol 410 is parked for months at a time, move it periodically or place it on stands in a way that follows safe storage practice for the suspension and chassis. Keeping the tires off damp concrete, maintaining inflation, and covering them from light exposure can all help preserve sidewalls and tread. Collector-car storage habits affect tire life as much as miles do.

On a 1968 Bristol, tire age is usually more important than mileage because many surviving cars are driven sparingly. A sound rule is to begin careful evaluation around five to seven years of age and to treat ten years as a serious replacement point regardless of remaining tread. The DOT date code on the tire tells you when it was made, which is essential on a collector car that may accumulate very few miles.

A Bristol 410 can look ready for the road while still riding on tires that have aged out. Sidewall checking, hardness, long-term air loss, and vibration can all appear before the tread is worn. When evaluating an older set, think in terms of rubber age, storage history, and visible condition rather than assuming that low annual mileage means the tires still have useful life left.

Tires on a 1968 Bristol should be inspected before every drive and given a more thorough check before any extended outing. Look for cracking, cuts, bulges, irregular wear, and signs that the tire is losing pressure over time. On a collector car with older wheels or possible tube-type service, valve stems and any tube-related components deserve attention as well.

That habit matters because a Bristol 410 may spend weeks between drives, and rubber can change noticeably during storage. A quick visual check before a local run and a fuller inspection before highway use can catch aging or setup issues early. Include the spare in that routine, since a forgotten spare on a vintage car is often the oldest tire in service.

For a 1968 Bristol 410, bias-ply construction sits closest to the traditional period fitment language reflected by the 670-15 size. Radials were becoming more established by the late 1960s, but originality standards can vary by market, production period, and owner preference. No single original-equipment brand should be assumed without car-specific history, factory literature, or marque-club confirmation.

If your goal is authenticity, start by deciding whether you are restoring to broad period character or to a narrowly defined factory-delivery specification. The 670-15 size gives the strongest visual and historical tie to classic fitment conventions, while a 195R15 may align with later use patterns or owner updates. Bristol specialists and marque clubs remain the best source for event-specific or chassis-specific confirmation.

Correct tire fitment does matter when showing a 1968 Bristol, especially because tire size, construction type, and sidewall appearance all affect how convincingly the car presents. On a Bristol 410, a numeric bias-ply size such as 670-15 reads differently from a radial 195R15, and blackwall versus wide whitewall changes the visual impression again. Judges and knowledgeable enthusiasts often notice those details quickly.

That does not mean every event applies the same standard. Some gatherings favor authenticity to original-era practice, while others are more relaxed about sensible road-use updates. If the car is being prepared for concours-style judging, confirm the accepted construction type and sidewall look before fitting tires. Marque clubs and event rules are the right places to verify what would be considered correct for your specific presentation goal.

For the 1968 Bristol 410 in 670-15, Firestone appears as a blackwall bias-ply tire with a 1450-pound maximum load at 32 psi and a 4.50 to 5.00-inch rim-width range. Coker Classic appears as a wide whitewall bias-ply tire with a 1550-pound maximum load at 32 psi and a 5.00 to 6.00-inch rim-width range. Both fit the same nominal size family, but they differ in sidewall presentation and wheel-width compatibility.

That comparison matters because two 670-15 tires can suit very different restoration goals. A Firestone blackwall supports a restrained appearance, while the Coker Classic whitewall creates a more formal vintage look. The wheel itself helps decide between them, since the approved rim-width ranges are not the same. On a Bristol, the right choice is the one that aligns both visually and mechanically with your actual wheel.

1968 Bristol tires can be suitable for highway driving when they are the correct size, in sound condition, properly inflated, and matched to the wheel. The year-make range includes both a radial 195R15 and a bias-ply 670-15, so road behavior will differ by construction even though both fit the Bristol 410. No speed-rating markings are carried here for these examples, so tire condition and correct application matter more than assumptions about modern high-speed capability.

A Bristol 410 was built as a refined grand tourer, but any late-1960s car should be driven with the whole vehicle in mind, not just the tires. Brakes, suspension condition, alignment, steering play, and age-related mechanical wear all influence safe road use. Treat the tires as one part of a complete pre-drive safety picture, especially before sustained higher-speed travel.

For 1968 Bristol fitment in 670-15, available load-and-pressure figures include 1450 pounds at 32 psi and 1550 pounds at 32 psi depending on the tire. Those numbers are manufacturer load ratings for those individual products, not a blanket instruction to use the same pressure in every 1968 Bristol tire. The 195R15 should be matched to its own tire manufacturer's recommendations and the car's original pressure guidance where applicable.

The right approach is to start with the Bristol's factory recommendation if you have the owner's literature, then compare it with the tire maker's pressure and load guidance for the exact tire on the car. Do not transfer a pressure figure from one size or construction type to another just because both use a 15-inch rim. Pressure choice should match the exact tire, vehicle weight distribution, and intended use.

Before a longer drive in a 1968 Bristol, inspect all four tires and the spare for cracking, cuts, bulges, irregular wear, and proper inflation. Check valve stems, confirm that each tire is holding pressure, and look closely at sidewalls if the car has been stored for long periods. On a Bristol 410, where both radial and bias-ply fitment paths exist, also confirm that all four road tires match in size and construction.

That tire inspection should sit alongside a broader mechanical check of fluids, brakes, lights, steering response, and suspension condition. A vintage Bristol is a long-legged touring car, but age-related issues often show up only after the car is driven farther and longer than usual. Catching a marginal tire, weak spare, or aging valve stem in the garage is much better than discovering it on the roadside.