Pontiac Tempest & LeMans Tires

Pontiac Tempest & LeMans listings for 1970 include three tire sizes: F78-14, G78-14, and G70-14. All three are 14-inch alphanumeric bias-ply sizes, but they do not represent the same overall section width and profile. F78-14 and G78-14 are paired with products for 5.00 to 7.00 inch rim widths, while G70-14 products are paired with 6.0 to 8.0 inch or 6.50 to 7.00 inch rim widths depending on the tire.

That means the correct choice for a Pontiac Tempest & LeMans starts with the actual wheel and the car's intended configuration, not just the model year. If the car is a more standard trim with a whitewall presentation, F78-14 or G78-14 may be the relevant place to look, while G70-14 points toward a wider, lower-profile muscle-era fitment. Checking the wheel width and the original tire information for the specific car is the cleanest way to sort between them.

F78-14 is an alphanumeric bias-ply tire size used on 1970 Pontiac Tempest & LeMans applications. The letter F identifies the size class, the number 78 identifies the tire's series or profile, and the 14 means the tire fits a 14-inch wheel. The available F78-14 product is built for rim widths from 5.00 to 7.00 inches and is a bias-ply construction tire.

For a Pontiac Tempest & LeMans owner, that code matters because it separates a narrower 78-series fitment from the larger G78-14 and the lower-profile G70-14. It also tells you the wheel diameter directly, unlike much earlier antique tire formats. If your car still carries original-style wheels, confirm the rim width before choosing the tire so the proportions and fit remain true to the car's intended stance.

A 1970 Pontiac Tempest & LeMans can show F78-14, G78-14, and G70-14 because more than one configuration used 14-inch bias-ply tires that differed in width and profile. The split is not a wheel-diameter change, since all three sizes fit 14-inch rims. Instead, it reflects variation within the model line, including differences in stance, wheel width, and the type of appearance or performance package the car may have carried.

That practical difference matters because selecting by year alone can still leave you with the wrong proportions for the car. A Pontiac Tempest & LeMans wearing narrower whitewall-oriented tires presents very differently from one using G70-14 performance-style tires with redline, RWL, or blackwall sidewalls. Original paperwork, wheel measurements, and the car's trim history are the best ways to determine which of the three sizes belongs on your specific 1970 car.

The listed Pontiac Tempest & LeMans tire options are all bias-ply designs in F78-14, G78-14, and G70-14. For these alphanumeric non-radial sizes, a tube is required. That applies across the available products here, regardless of whether the tire uses a wide whitewall, narrow whitewall, dual-white-stripe, redline, pin white stripe, RWL, or blackwall sidewall style.

Tube choice should match both the tire size and the wheel condition. On a collector Pontiac Tempest & LeMans, the wheel should be clean, true, and free of corrosion or burrs that can damage the tube during installation. Proper tube and flap practice also helps preserve ride quality and reduces the chance of trouble on a car that may spend long periods parked between drives.

The 1970 Pontiac Tempest & LeMans uses three listed sizes, so confirmation starts with the actual wheel and the car's original configuration. F78-14 and G78-14 are associated with 5.00 to 7.00 inch rim widths, while G70-14 is associated with wider ranges that include 6.0 to 8.0 inches and 6.50 to 7.00 inches. All are 14-inch tires, but they create different overall proportions and period appearances.

A sound approach is to inspect the wheel width, compare the existing tire markings if they are still trustworthy, and check any surviving build information for the car. That is especially important with Pontiac Tempest & LeMans because 1970 spans both mainstream and more performance-themed presentations. Matching the tire size to the wheel and to the way the car was originally equipped will usually point you to the correct choice quickly.

Pontiac Tempest & LeMans tires in these sizes are offered in a wide range of sidewall styles, including wide whitewall, narrow whitewall, dual-white-stripe, redline, RWL, pin white stripe, and blackwall. F78-14 appears here with a wide whitewall option, G78-14 is offered with several whitewall variations, and G70-14 carries the broadest muscle-era style spread with redline, RWL, pin white stripe, and blackwall choices.

That variety lets a Pontiac Tempest & LeMans owner tailor the final look to the car's trim level and period character. Whitewalls usually suit more formal or mainstream presentations, while redline, RWL, and blackwall treatments align more naturally with sportier 1970 styling. If originality matters, compare the sidewall style to period photos, surviving sales literature, or marque-club guidance for the specific configuration rather than choosing by appearance alone.

Pontiac Tempest & LeMans tires in these listed sizes come from Coker Classic, BFGoodrich, Firestone, and Goodyear. Coker Classic appears in F78-14 and G78-14 whitewall offerings, BFGoodrich appears in G78-14 whitewall styles, Firestone appears in G70-14 Wide Oval versions, and Goodyear appears in G70-14 Custom Wide Tread versions. That spread gives the car a mix of visual and period-style choices within the same 14-inch fitment family.

Brand choice on a Pontiac Tempest & LeMans is often tied less to raw fitment than to restoration goals and sidewall appearance. Someone restoring a whitewall-equipped car may focus first on the proper stripe treatment, while a muscle-era presentation may center on the Firestone or Goodyear performance-style offerings in G70-14. Once the size is settled, compare the available brands by series and sidewall style to match the look you want.

Pontiac Tempest & LeMans tires here appear in four distinct series: Coker Classic Bias Ply, Silvertown Classic Bias Ply, Wide Oval, and Custom Wide Tread. All are bias-ply constructions, but they serve different visual roles. Coker Classic Bias Ply and Silvertown Classic Bias Ply cover more traditional whitewall presentations, while Wide Oval and Custom Wide Tread are the performance-style series tied to G70-14 sizing and more aggressive sidewall treatments.

For a Pontiac Tempest & LeMans owner, the practical choice is to decide whether the car should read as a clean, standard 1970 intermediate or as a more assertive muscle-era package. The series selection should support that story. Once you know the correct size, the series name helps sort the remaining options by visual character, with whitewall-oriented bias-ply lines on one side and period performance-style bias-ply lines on the other.

A Pontiac Tempest & LeMans should be stored in a cool, dry, dark space with the tires kept away from direct sunlight, ozone sources, and large temperature swings. Bias-ply tires especially benefit from clean concrete or a barrier under the tire, correct inflation, and a car that is not left carrying the same contact patch for months at a time. Long stationary periods can encourage flat spotting and cosmetic sidewall aging.

For practical collector use, move the Pontiac Tempest & LeMans periodically or place it on stands if it will sit for an extended season. Keep the tires clean with mild soap and water rather than harsh dressings that can accelerate drying. Storage habits matter as much as mileage on collector cars, because a low-use tire can still age significantly even when tread wear remains minimal.

Tires on a Pontiac Tempest & LeMans should be visually inspected before every drive and given a closer hands-on inspection several times each season. On a bias-ply collector tire, that means checking inflation, sidewall cracking, tread separation signs, bead condition, and any irregular wear that could point to alignment or suspension issues. Whitewall, redline, and striped sidewalls should also be checked for cuts, scuffs, and age-related hardening.

Because many Pontiac Tempest & LeMans cars are driven infrequently, time can be a bigger enemy than mileage. A tire that looks presentable at a glance may still be aging internally. Regular inspection catches problems before they become roadside failures and also helps preserve the car's ride quality, steering feel, and appearance across a season of local driving, events, and shows.

Pontiac Tempest & LeMans tires should be replaced when age, cracking, hardening, vibration, bulges, repeated air loss, or structural concerns appear, even if the tread still looks deep. Collector tires often age out before they wear out, particularly on low-mileage cars that spend long periods parked. Bias-ply construction can mask age in ways that are not obvious until the tire is closely evaluated.

The practical rule for a Pontiac Tempest & LeMans is to treat visible condition as only one part of the decision. If the car has older tires of uncertain age, a specialist inspection is wise before regular road use. Replacing an aged set can protect the car's handling and preserve the bodywork and trim from damage that can result from a tire failure on a restored or well-kept collector Pontiac.

Pontiac Tempest & LeMans fitments for 1970 include F78-14, G78-14, and G70-14, all in bias-ply construction. The available series include Coker Classic Bias Ply, Silvertown Classic Bias Ply, Wide Oval, and Custom Wide Tread, which shows that more than one period-style tire approach is represented within the model line. No single answer fits every 1970 Pontiac Tempest & LeMans because the correct tire depends on the car's exact configuration.

For restoration work, the best path is to match the size first, then the sidewall style and series character to the car's trim and presentation. A whitewall-equipped Pontiac Tempest & LeMans and a performance-styled G70-14 car should not be treated the same. Original paperwork, period photos, and marque-club references remain the strongest tools for narrowing the correct tire for a specific restoration target.

Correct tire fitment can absolutely affect how a Pontiac Tempest & LeMans is judged and how convincing the restoration appears. Size, sidewall treatment, and the overall proportion of the tire all contribute to whether the car reads as properly restored or visually off. On a 1970 car with F78-14, G78-14, and G70-14 all in the picture, using the wrong profile can change the stance in a way experienced judges notice quickly.

That does not mean every Pontiac Tempest & LeMans needs the same tire to be appreciated, but it does mean the tire should fit the car's story. A broad whitewall on one configuration and a redline or RWL on another can both be right when they match the car's original character. Marque clubs and period reference material are especially helpful when preparing a car for formal judging.

Pontiac Tempest & LeMans restoration choices here include wide whitewall, narrow whitewall, dual-white-stripe, redline, RWL, pin white stripe, and blackwall depending on size. F78-14 and G78-14 lean toward whitewall presentations, while G70-14 includes redline, RWL, pin white stripe, and blackwall options that suit a more performance-centered look. The correct sidewall is therefore tied to the exact version of the car rather than to the Pontiac Tempest & LeMans name alone.

When authenticity matters, start by asking what visual message the car should send. A more conservative Pontiac Tempest & LeMans generally looks right with a whitewall treatment, while a sportier 1970 setup may call for one of the G70-14 performance-style sidewalls. If the car is being restored for serious authenticity, compare the sidewall choice to surviving factory literature and marque-specific judging standards.

These Pontiac Tempest & LeMans tires are modern collector-market bias-ply reproductions in period-correct sizes and can be used for public-road driving when they are correctly fitted, properly inflated, and installed on sound wheels. Their behavior, however, remains bias-ply in character. That means they will not respond exactly like modern radial tires and should be treated as vintage-style equipment rather than contemporary everyday-driver rubber.

For a Pontiac Tempest & LeMans owner, the real safety question is the overall condition of the car and whether the chosen size matches the wheel and intended use. A fresh, correctly matched set is far preferable to aging tires of uncertain history. Sensible speeds, proper alignment, and a complete brake and suspension check should be part of the plan before returning the car to regular road use.

Before driving a Pontiac Tempest & LeMans, check inflation pressure, overall tire condition, sidewall damage, tread condition, and whether the tires are seated properly on the wheels. Also confirm that the size on the car matches the wheel width it is mounted on, since F78-14, G78-14, and G70-14 do not share the same intended rim-width range. Uneven wear, steering pull, or vibration should be addressed before a longer trip.

A collector Pontiac Tempest & LeMans should also be checked as a complete system. Lug torque, wheel condition, brakes, suspension bushings, and front-end alignment all influence how well a bias-ply tire performs on the road. Taking a few minutes to inspect the car before each outing is one of the simplest ways to avoid damaging hard-to-replace parts and to keep the car enjoyable to drive.

A Pontiac Tempest & LeMans fitted with period-style bias-ply tires should be driven at moderate, sensible speeds that respect both the age of the vehicle and the handling characteristics of bias-ply construction. Even with fresh reproduction tires, steering response, tracking, and braking feel will differ from a modern radial-equipped car. The right speed is the one that keeps the car settled, predictable, and comfortably within the condition of its tires, wheels, brakes, and suspension.

In practical terms, a well-sorted Pontiac Tempest & LeMans can certainly be enjoyed on normal roads, but it should not be driven as though it were on modern performance tires. Leave extra following distance, avoid abrupt lane changes, and build speed gradually after the car has been sitting. If the car feels nervous or wanders at road speed, treat that as a cue to recheck tire size, inflation, wheel condition, and alignment.