The 1969 MG MGB sits squarely in the heart of the classic British sports car era, with simple mechanicals, tidy proportions, and the kind of open-road character that makes tire choice matter more than it does on heavier cars. This year brings more than one fitment path, with 165R14 radial tires used on the GT Coupe and 155R14 radial or 520-14 bias-ply tires used on the Roadster, all on 14-inch rims. That opens the door to choices in construction, brand, and sidewall presentation, from blackwall radials to narrow whitewall bias-ply options. For a driver-focused car like the MGB, the right choice starts with the exact body style and the look and feel you want to preserve.
Which Tire Size Is Right for The 1969 MG MGB
The 1969 MG MGB uses three primary tire sizes, and the right one depends first on whether the car is a GT Coupe or a Roadster. All of these fitments use a 14-inch rim, but construction differs between radial and bias-ply, so the real decision is confirming the exact sub-model and then choosing the tire style and driving character that best match the car.
A 165R14 size uses a 165-millimeter nominal section width, radial construction, and a 14-inch rim diameter. On the 1969 MG MGB, this is the radial fitment used for the GT Coupe and it keeps the car in a traditional metric radial format suited to vintage European applications. Available choices include blackwall tires from Pirelli, Michelin, and Vredestein across series such as Cinturato CA67, Michelin XAS, and Sprint Classic. This size is the one to evaluate when preserving the GT's proper fitment style and comparing period-minded radial options.
A 155R14 tire is a Euro-metric radial with a 155-millimeter nominal section width sized for a 14-inch wheel. On the 1969 MG MGB, this size appears on the Roadster and represents a narrower radial fitment than the GT Coupe's 165R14. Product choices are available in blackwall form from Michelin and Firestone, including the Michelin X Radial and Firestone F560 Radial, both aligned with a classic 80-series metric radial presentation. This is the size to consider for a Roadster owner who wants radial construction while keeping the car in a vintage-appropriate tire format.
The 520-14 designation is a numeric bias-ply size, with the leading number representing a nominal section width of about 5.20 inches and the final number indicating a 14-inch rim. On the 1969 MG MGB Roadster, it offers a distinctly earlier construction style than the radial alternatives and changes the tire-selection conversation toward appearance as much as fitment. Available options center on Premium Sport bias-ply tires in the Premium Sport Lowrider series with narrow whitewall treatments. This size deserves attention when the goal is a more traditional presentation and a bias-ply tire character on a Roadster.
Sub-model fitment matters on the 1969 MG MGB because the GT Coupe and Roadster do not share the same tire setup. Both use 14-inch rims, but the GT stays with one radial size while the Roadster can follow either a radial or bias-ply path depending on the setup you want to maintain.
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1969 MG MGB GT Coupe
The 1969 MG MGB GT Coupe uses a 165R14 radial tire, keeping this sub-model's fitment straightforward. That makes the main decision less about size and more about choosing among the available blackwall radial brands and series that suit the car's intended road use and period-style character.
The 1969 MG MGB Roadster has a split fitment story, using either 155R14 radial tires or 520-14 bias-ply tires. That means tire selection starts with deciding whether the car should remain in a radial setup or follow a more traditional bias-ply presentation with narrow whitewall styling.
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 1969 MG MGB Tires for Sale
Available 1969 MG MGB tires span radial and bias-ply constructions, with blackwall choices from Pirelli, Michelin, Vredestein, and Firestone, plus Premium Sport narrow whitewall bias-ply options. The product grid is where to compare series, sidewall presentation, and rim-width details within the correct size.
Tire questions for a 1969 MG MGB usually come down to body style, 14-inch rim fitment, radial versus bias-ply construction, and the difference between blackwall touring radials and restoration-oriented bias-ply options.
Tire Size & Fitment
What tire size fits a 1969 MG MGB?
A 1969 MG MGB can use three primary tire sizes: 165R14, 155R14, and 520-14. The GT Coupe uses 165R14 radial tires, while the Roadster uses either 155R14 radial tires or 520-14 bias-ply tires, depending on the setup being followed.
That means the first step is confirming whether the car is a GT Coupe or a Roadster before comparing actual tire choices. Once the sub-model is clear, the next decision is whether to stay with the car's existing construction style or choose between radial road use and a more traditional bias-ply presentation.
What size rim does a 1969 MG MGB use?
The tire fitments for the 1969 MG MGB use a 14-inch rim diameter. That is consistent across the 165R14, 155R14, and 520-14 tire sizes associated with this model year, even though the sizes themselves differ by section width and construction type.
A matching 14-inch diameter does not remove the need to verify the actual wheel on the car, especially if it has been changed over the years. Wheel width also matters when comparing individual tires, so it is worth checking the wheel itself before moving from one MGB fitment style to another.
Do all 1969 MG MGB sub-models use the same tire size?
No, the 1969 MG MGB sub-models do not all use the same tire size. The GT Coupe uses 165R14 radial tires, while the Roadster uses either 155R14 radial tires or 520-14 bias-ply tires, so there is a genuine fitment difference between the two body styles.
That difference is important because it affects more than just the number on the sidewall. It changes the tire format, construction, and the kinds of products available, so choosing correctly starts with identifying the exact sub-model and then matching the tire to the car's current wheels and intended appearance.
Bias-Ply & Radial Options
Is 520-14 a bias-ply or radial tire for the 1969 MG MGB?
On the 1969 MG MGB, 520-14 is a bias-ply tire size used on the Roadster. It is a vintage numeric bias-ply format rather than a radial, and it differs significantly in construction from the Roadster's 155R14 radial option and the GT Coupe's 165R14 radial fitment.
Choosing 520-14 usually points toward a traditional look and a bias-ply driving feel rather than a metric radial presentation. It also means paying attention to wheel compatibility and the overall setup of the car, since a Roadster using bias-ply tires should be matched carefully to the wheel size and intended use.
Should I use bias-ply or radial tires on a 1969 MG MGB?
That depends on which 1969 MG MGB sub-model you have and what you want from the car. The GT Coupe uses a 165R14 radial, while the Roadster can follow either a 155R14 radial fitment or a 520-14 bias-ply fitment, so both construction paths are relevant within the model range.
A radial choice usually keeps the car in a classic European touring style, while a bias-ply choice leans more heavily toward traditional appearance. The best approach is to start with the correct size for the sub-model, then confirm the wheel setup and decide whether road manners or vintage presentation matters more for the car.
What should I check before converting my 1969 MG MGB from bias-ply to radial tires?
A 1969 MG MGB Roadster using 520-14 bias-ply tires should be checked carefully before moving to a radial size such as 155R14. The wheel diameter remains 14 inches, but construction changes can affect how the tire works with the wheel and how it sits within the car's available space.
Wheel width is one of the first things to confirm, followed by clearance at the fenders and during steering movement. Suspension condition also matters on an older sports car, so it helps to inspect springs, bushings, and alignment before making the change instead of treating the conversion as automatic.
Choosing the Right Tire
What should I consider when choosing a 1969 MG MGB tire?
Start with the correct fitment for the exact car: 165R14 for the GT Coupe, and either 155R14 radial or 520-14 bias-ply for the Roadster. After that, the main factors are construction type, sidewall style, brand, tire series, and whether the tire suits a driving-oriented car or a more restoration-minded presentation.
It also helps to compare the wheel on the car against the tire's rim-width needs when that information is available. A buyer choosing among MGB tires is usually balancing correct size, the desired look, and how closely the tire should match the car's intended use rather than searching for one universal answer.
What sidewall styles are available for 1969 MG MGB tires?
The available 1969 MG MGB tire options include blackwall and narrow whitewall sidewall styles. Blackwall choices appear in the radial sizes, while the 520-14 bias-ply offerings for the Roadster are presented with narrow whitewall treatments within the Premium Sport range.
That makes sidewall style part of the larger decision about how the car should look when finished. A blackwall radial keeps the presentation simple and sporting, while a narrow whitewall bias-ply tire pushes the Roadster toward a more stylized vintage appearance that should still be checked against the car's actual setup.
What brands offer tires for the 1969 MG MGB?
Tires for the 1969 MG MGB are available from Pirelli, Michelin, Vredestein, Firestone, and Premium Sport, depending on the size and construction. The radial sizes cover several classic European-style and touring-oriented brands, while the 520-14 bias-ply size is represented by Premium Sport.
Brand choice matters only after the correct size has been confirmed for the GT Coupe or Roadster. From there, it makes sense to compare each tire's series, sidewall treatment, and wheel-compatibility details rather than assuming that every brand offers the same type of MGB tire in the same size.
Restoration & Appearance
Which tire should I choose for a period-style 1969 MG MGB?
A period-style 1969 MG MGB tire choice starts with the right sub-model fitment. The GT Coupe uses 165R14 radial tires, while the Roadster can follow either a 155R14 radial approach or a 520-14 bias-ply approach, so the visual direction and construction style vary within the same model line.
That means appearance should be judged alongside the car's intended use and how original the restoration needs to be. When exact historical accuracy matters, checking marque literature or club guidance is worthwhile, while many owners simply choose the size and construction that best support the look they want to preserve.
How does tire construction affect the appearance of a restored 1969 MG MGB?
Tire construction changes the visual character of a restored 1969 MG MGB more than many buyers expect. A radial tire such as 165R14 or 155R14 gives the car a classic European road-going look, while the 520-14 bias-ply setup on a Roadster creates a more traditional vintage presentation.
Sidewall treatment plays into that impression as well, since the radial options are blackwall and the available 520-14 bias-ply tires use narrow whitewalls. Construction should not be chosen on looks alone, though, because the wheel setup and the way the car will actually be driven still matter in the final decision.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1969 MG MGB?
Yes, modifications can affect tire fitment on a 1969 MG MGB even when the tire size itself is correct for the model. Aftermarket wheels, altered wheel width, suspension changes, or body modifications can all change how a 165R14, 155R14, or 520-14 tire sits and clears the car.
That is especially important on a small British sports car where available space is limited compared with larger classics. Any MGB with non-original wheels or ride height should have its wheel diameter, width, and steering clearance checked before new tires are selected rather than relying only on the original fitment size.
What should I inspect before driving a 1969 MG MGB on new tires?
Before driving a 1969 MG MGB on new tires, inspect the wheels, valve stems, and overall condition of the suspension and steering components. It also helps to confirm proper air pressure, look for any rubbing at full steering lock, and make sure the tire size matches the car's GT Coupe or Roadster fitment.
A short test drive followed by a second visual check is a smart habit on an older car. That gives the owner a chance to catch early signs of contact, uneven seating, or pressure loss before longer use, which is particularly worthwhile on collector vehicles that may spend long periods parked.
How should 1969 MG MGB tires be maintained on a collector car?
Tires on a collector 1969 MG MGB should be maintained with regular pressure checks, visual inspections, and careful storage habits. Even low-mileage cars need attention for cracking, cuts, bulges, uneven wear, and slow air loss, whether the car is running 165R14, 155R14, or 520-14 tires.
Storage conditions matter because collector cars often sit longer than daily drivers. Keeping the MGB away from prolonged sunlight, excess heat, and moisture helps preserve the tires, and periodic inspection before each driving season is a sensible routine even when the tread still appears to be in good shape.
