The 1980 Triumph TR8 occupies a distinctive place in British sports car history, pairing wedge-era styling with V8 character in a compact roadster platform. It appeals to buyers who want a late-classic Triumph that feels more muscular than the earlier four-cylinder TR7 while still retaining period personality. Tire fitment for the 1980 Triumph TR8 is refreshingly straightforward, centered on a 185/70R13 radial on a 13-inch rim. That simplicity still leaves meaningful choice, with blackwall, redline, and wide whitewall options alongside touring- and sport-oriented radial series. The real task is choosing a tire that suits the car's appearance, intended road use, and current wheel setup.
Which Tire Size Is Right for The 1980 Triumph TR8
The 1980 Triumph TR8 uses one primary tire size: 185/70R13, a metric radial built for a 13-inch rim. The Base model shares that same fitment, so the decision is less about identifying between multiple factory sizes and more about choosing the right radial style, brand, and overall presentation for your car.
185/70R13 is a metric radial size in which 185 identifies the nominal section width in millimeters, 70 is the aspect ratio, and 13 is the wheel diameter in inches. On the 1980 Triumph TR8, that radial construction matches the car's late-classic sports car character and keeps the fitment conversation centered on the correct 13-inch wheel. Available choices include BFGoodrich, Avon, Dunlop, Michelin, and Vredestein, with blackwall, redline, and wide whitewall sidewall treatments depending on the tire series. It is the right size to evaluate when balancing period-style appearance, road use, and wheel compatibility.
Fitment is straightforward across the covered 1980 Triumph TR8 sub-models, with the same primary tire size used throughout. Checking the exact sub-model still matters because it confirms that tire selection can focus on radial style, brand, and wheel compatibility rather than sorting through multiple factory sizes.
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1980 Triumph TR8 Base
The 1980 Triumph TR8 Base uses the same 185/70R13 radial fitment as the model core, keeping the sizing decision simple. That lets the focus shift to the kind of radial tire you want, whether that means a traditional blackwall sports-car look or a more restoration-oriented sidewall treatment.
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 1980 Triumph TR8 Tires for Sale
Available 185/70R13 choices span BFGoodrich, Avon, Dunlop, Michelin, and Vredestein, with blackwall, redline, and wide whitewall presentations. The product grid also shows useful differences in tire series, rim-width compatibility, weight, and load figures across these radial options.
These FAQs focus on the 1980 Triumph TR8's 185/70R13 radial fitment, 13-inch wheel sizing, available sidewall and brand choices, and the practical checks worth making before regular road use.
Tire Size & Fitment
What tire size fits a 1980 Triumph TR8?
The 1980 Triumph TR8 uses a 185/70R13 radial tire. That is a modern metric radial size built around a 13-inch rim, and it is the primary fitment for this model year. The covered TR8 Base sub-model uses that same size, which keeps the factory-style sizing question straightforward.
Once the size is confirmed, the next step is choosing among the available 185/70R13 tire styles and series. Sidewall treatment, rim-width compatibility, and the car's current wheel setup all matter, especially if the TR8 has been changed from its original wheel or suspension configuration over the years.
What size rim does a 1980 Triumph TR8 use?
The 1980 Triumph TR8 uses a 13-inch rim with its 185/70R13 tire size. The tire size itself ends in 13, which identifies the wheel diameter in inches, and the available products for this fitment are all built for that same 13-inch rim diameter.
Wheel diameter is only part of the fitment picture, so it is still smart to confirm wheel width before choosing a specific tire. Some 185/70R13 products are suited to slightly different rim-width ranges, and that can matter if the car has replacement wheels rather than the wheel dimensions it left with.
Does the 1980 Triumph TR8 Base use the same tire size?
Yes. The 1980 Triumph TR8 Base uses the same 185/70R13 radial tire size as the model core. There is no alternate primary size to sort through for the Base sub-model, which makes fitment simpler than on many older vehicles with multiple trim-specific tire choices.
That consistency means the real choice comes down to the tire itself rather than the nominal size. A Base model owner can compare blackwall versus redline or wide whitewall presentation, review rim-width compatibility, and choose a tire series that matches the car's visual style and intended road use.
Choosing the Right Tire
What should I consider when choosing a 185/70R13 tire for a 1980 Triumph TR8?
Start with the correct primary size, which is 185/70R13 on a 13-inch rim. From there, compare the available radial options by sidewall appearance, tire series, brand, rim-width range, weight, and load figures where they are stated. Those factors shape how the tire suits a sports car that may be driven, shown, or both.
A period-style TR8 may call for a different look than a car built mainly for spirited road use. It helps to confirm whether the car still has stock-style wheels, then choose the tire that best matches the wheel width and the visual character you want without drifting away from the correct primary size.
What sidewall styles are available for 1980 Triumph TR8 tires?
The 1980 Triumph TR8 has 185/70R13 tire choices in several sidewall styles, including blackwall, redline, and wide whitewall. Blackwall options are the most common in this size, while BFGoodrich Silvertown Radial versions add redline and 2-inch wide whitewall alternatives for buyers who want a different visual presentation.
Sidewall style changes the look of the car more than the fitment itself, so the choice usually comes down to appearance and the kind of build you are aiming for. A blackwall generally preserves a more conventional sports-car look, while redline or wide whitewall can push the TR8 toward a more distinctive period-style presentation.
What brands offer tires for the 1980 Triumph TR8?
185/70R13 tires for the 1980 Triumph TR8 are available from BFGoodrich, Avon, Dunlop, Michelin, and Vredestein. The assortment includes series such as Silvertown Radial, CR6ZZ, SP Sport Aquajet, Sport Classic, Michelin XDX-B, and Sprint Classic, so there is more than one approach within the same basic size.
Brand choice should be considered alongside the tire series, sidewall treatment, and wheel compatibility rather than as a stand-alone decision. Some options emphasize a traditional appearance, while others present a more performance-oriented or European classic look, so it helps to compare the full tire specification before deciding.
Restoration & Appearance
Which tire should I choose for a period-style 1980 Triumph TR8?
A period-style 1980 Triumph TR8 should begin with the correct 185/70R13 radial size, since that keeps the car anchored to its proper fitment. From there, the best choice depends on the presentation you want. Blackwall tires maintain a familiar late-1970s and early-1980s sports-car look, while redline or wide whitewall options create a more distinctive visual statement.
For a restoration-oriented build, the tire's appearance can matter almost as much as the size itself. It is wise to compare sidewall treatment, tread character, and overall visual balance with the car's wheels and trim, then use marque-specific historical references if exact originality is important to the project.
How does tire construction affect the appearance of a restored 1980 Triumph TR8?
On a 1980 Triumph TR8, construction is less of a style debate than on earlier bias-ply-era cars because the primary fitment is already radial. The visible appearance difference comes more from the specific radial tire series and sidewall style than from choosing between bias-ply and radial construction for this model year.
That makes details like blackwall, redline, or wide whitewall especially important on a restored TR8. A buyer aiming for a restrained sports-car look may lean one way, while someone building around a stronger period-style statement may choose another, all while staying with the correct 185/70R13 radial fitment.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1980 Triumph TR8?
Yes. Even though the primary tire size for a 1980 Triumph TR8 is 185/70R13, modifications can change how comfortably that size works on the car. Aftermarket wheels, altered wheel width, suspension changes, ride-height adjustments, or bodywork variations can all affect clearance and how the tire sits within the wheel opening.
A modified TR8 should be checked for wheel diameter, wheel width, steering clearance, and space at the fender and suspension before settling on a tire. Keeping the correct size is still the starting point, but the actual wheel and chassis setup deserves a close look before road use.
What should I inspect before driving a 1980 Triumph TR8 on new tires?
Before driving a 1980 Triumph TR8 on new tires, inspect the wheels for correct diameter and condition, confirm that the tire size is 185/70R13, and make sure inflation is set appropriately for the tire and vehicle setup. It is also smart to check for rubbing at full steering lock and under normal suspension movement.
The rest of the car deserves attention too, especially on an older British sports car that may have seen long storage. Look over suspension wear, wheel fastener condition, alignment behavior, and any signs of interference once the tires are mounted, then recheck pressure and clearance after the first few drives.
How should 185/70R13 tires on a collector 1980 Triumph TR8 be maintained?
185/70R13 tires on a collector 1980 Triumph TR8 should be maintained with regular pressure checks, visual inspections, and careful storage habits. Watch for cracking, bulges, cuts, uneven wear, and slow air loss, especially if the car is driven only occasionally. Older collector vehicles can wear tires by age and storage exposure as much as by mileage.
Keeping the car away from prolonged sunlight, heat, moisture, and ozone sources helps preserve the tires between drives. It also pays to inspect tread and sidewalls before each outing, since a TR8 that sits for long periods may develop condition issues that are easy to miss until the car is back on the road.
