The 1967 MG 1100 came from the era when compact British sedans were prized for tidy packaging, light steering, and practical road manners rather than sheer size. Its front-wheel-drive layout and small-wheel stance gave it a distinctly different character from many larger contemporaries. Tire choice on this model centers on two period-appropriate directions: a 5.50-12 bias-ply fitment or a 145R12 radial, both on 12-inch rims. That gives owners a meaningful decision between traditional construction and a classic Euro-metric radial approach, with the radial option represented here by the Michelin MX in a blackwall style. The right choice depends on whether the priority is period-style presentation, driving feel, or preserving an existing wheel-and-tire setup.
Which Tire Size Is Right for The 1967 MG 1100
The 1967 MG 1100 uses two primary tire sizes, and the difference comes down largely to construction rather than wheel diameter. Both 5.50-12 bias-ply and 145R12 radial fit 12-inch rims, so the first step is deciding whether the car should retain a more traditional bias-ply setup or move toward a radial configuration already associated with this model.
145R12 is a Euro-metric radial size in which 145 refers to the nominal section width in millimeters, R identifies radial construction, and 12 is the rim diameter in inches. On the 1967 MG 1100, this size reflects a more modern radial-format approach while still staying within a compact, period-appropriate 12-inch fitment. Available product choice in this size includes the Michelin MX, an 80-series metric radial in blackwall form. This size is worth considering when the goal is a radial-equipped setup that remains visually restrained and properly matched to the car's small-wheel proportions.
5.50-12 is a numeric bias-ply size, with 5.50 indicating the nominal section width in inches and 12 identifying the wheel diameter. That sizing format is familiar on many small cars of the period and gives the 1967 MG 1100 a distinctly traditional tire presentation. Bias-ply construction also changes the selection conversation, since appearance, driving character, and restoration intent often matter as much as the size itself. This fitment deserves a close look when the car is being kept in a more period-style configuration or when preserving an existing bias-ply wheel-and-tire combination matters.
Fitment is straightforward for the covered 1967 MG 1100 sub-model because the same two primary tire sizes appear across it. Even so, confirming the exact sub-model and current wheel setup helps narrow the decision between the bias-ply and radial fitments.
1
1967 MG 1100 Sport Sedan
The 1967 MG 1100 Sport Sedan uses the same two core fitment paths found on the model overall: 145R12 radial and 5.50-12 bias-ply on 12-inch rims. That leaves the real choice centered on construction, appearance, and how closely the tire should align with a traditional restoration-style setup versus a radial-equipped road car.
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 1967 MG 1100 Tires for Sale
Available product choice for the 1967 MG 1100 centers on the 145R12 radial size, represented here by Michelin's MX series in a blackwall 80-series metric radial. That keeps the comparison focused on radial construction, compact 12-inch fitment, and wheel-width compatibility.
These FAQs focus on the tire sizes used on the 1967 MG 1100, how the 12-inch fitment works, and what to consider when choosing between radial and bias-ply construction for restoration or road use.
Tire Size & Fitment
What tire size fits a 1967 MG 1100?
The 1967 MG 1100 uses two primary tire sizes: 145R12 in radial construction and 5.50-12 in bias-ply construction. Both sizes are associated with the model, so the correct starting point is not just the number on the sidewall, but also whether the car is set up for a radial or a bias-ply tire.
That distinction matters because both sizes use the same 12-inch rim diameter while representing different construction types and sizing systems. Checking the tires currently on the car, the wheel width, and the overall condition of the suspension and steering helps keep the choice aligned with the car's intended use and existing setup.
What size rim does a 1967 MG 1100 use?
The 1967 MG 1100 uses a 12-inch rim diameter with both of its primary tire sizes. The 145R12 radial and the 5.50-12 bias-ply are both built around that same 12-inch wheel diameter, so wheel size is consistent even though the tire constructions differ.
Rim diameter is only one part of the fitment picture, especially on a compact car with small wheels. It is still smart to confirm actual wheel width and inspect for any aftermarket wheel changes before choosing a tire, since a 12-inch wheel alone does not automatically settle every compatibility question.
What does 5.50-12 mean on a 1967 MG 1100?
On a 1967 MG 1100, 5.50-12 is a numeric bias-ply tire size. The 5.50 refers to the nominal section width in inches, and the 12 refers to the rim diameter in inches. It is an older sizing format that suits the era of the car and reflects a traditional bias-ply fitment approach.
Understanding that format helps when comparing it with the radial 145R12 size, which follows a different sizing convention. A buyer looking at 5.50-12 should think beyond the numbers alone and consider whether the goal is a period-style look, preserving existing wheel fitment, or maintaining the construction type already on the car.
Bias-Ply & Radial Options
Is 5.50-12 a bias-ply or radial tire for the 1967 MG 1100?
For the 1967 MG 1100, 5.50-12 is a bias-ply tire size. It uses the older numeric sizing format commonly seen on small cars of the period and differs from the model's 145R12 fitment, which is the radial option associated with the same 12-inch rim diameter.
That makes 5.50-12 the size to examine when maintaining a more traditional tire construction and period-style presentation. The practical next step is confirming the car's current wheel and tire setup, since switching between bias-ply and radial construction can change how the car feels and may call for a closer look at wheel width and overall clearance.
Should I use bias-ply or radial tires on a 1967 MG 1100?
The 1967 MG 1100 can be approached from either direction because both 5.50-12 bias-ply and 145R12 radial fitments are associated with the model. Bias-ply usually appeals to owners focused on a more traditional presentation, while the radial choice suits buyers who want a classic small-car tire in a more modern construction type.
The better choice depends on how the car is used and how closely the tire should match the character of the rest of the build. A careful check of wheel width, suspension condition, and current clearances is worthwhile before changing construction, especially on a compact sedan where small dimensional differences can matter.
What should I check before converting my 1967 MG 1100 from bias-ply to radial tires?
A conversion from 5.50-12 bias-ply to 145R12 radial on a 1967 MG 1100 starts with confirming that the car still has the correct 12-inch wheels and that the wheel width suits the radial tire being considered. The condition of the steering, suspension, and alignment should also be reviewed before making the change.
The goal is to make sure the radial works with the car's actual setup rather than assuming the same rim diameter settles everything. Clearance at full steering lock, fender room, and the overall state of older components deserve attention, particularly on a lightly used collector car that may have sat for extended periods.
Choosing the Right Tire
What should I consider when choosing a tire for a 1967 MG 1100?
Start with the two primary fitments used on the 1967 MG 1100: 5.50-12 bias-ply and 145R12 radial. The right choice depends on whether the car is being kept in a more traditional period-style configuration or set up around radial construction, since both use 12-inch rims but represent different tire types and driving character.
After the size and construction are settled, compare practical details such as wheel-width compatibility, sidewall appearance, and how the tire suits the car's intended use. On a small British sedan, preserving proper proportions and avoiding clearance surprises matters just as much as selecting a recognized vintage tire size.
What sidewall styles are available for 1967 MG 1100 tires?
Among the currently represented tire choices for the 1967 MG 1100, the available 145R12 radial is offered in a blackwall style. That gives the car a clean, understated look that suits many compact European sedans without adding a more decorative sidewall treatment.
Sidewall style should be chosen with the overall presentation of the car in mind rather than treated as a minor cosmetic detail. On a restoration-oriented MG 1100, the sidewall can influence whether the finished car feels more reserved and original in spirit or more personalized in appearance.
What brands offer tires for the 1967 MG 1100?
Michelin is represented in the available 1967 MG 1100 tire selection through the Michelin MX in 145R12. That product combines a classic Euro-metric radial size with a blackwall presentation, keeping the focus on a familiar small-car radial format rather than a broad mix of competing brands.
Brand matters, but it should be considered alongside construction type, size, and wheel compatibility. Since the MG 1100 uses small 12-inch fitments and has both bias-ply and radial paths, the more important decision is often choosing the correct overall tire approach first and then narrowing the product choice within that direction.
Restoration & Appearance
Which tire should I choose for a period-style 1967 MG 1100?
A period-style 1967 MG 1100 usually starts with the tire size and construction that best match the character of the car's era. In this case, 5.50-12 bias-ply carries the more traditional presentation, while 145R12 radial still remains visually appropriate for owners who want a classic small-car size in radial form.
The decision turns on how strictly the restoration follows period appearance versus how the car will actually be driven. When exact originality matters, marque references and vehicle-specific historical material are worth consulting, but for many restorations the main goal is choosing a tire that looks right, fits correctly, and suits the intended use.
How does tire construction affect the appearance of a restored 1967 MG 1100?
Tire construction changes more than ride and handling on a restored 1967 MG 1100; it also changes the visual character of the car. A 5.50-12 bias-ply generally supports a more traditional small-sedan presentation, while a 145R12 radial gives a later, more modernized look within the same compact 12-inch format.
That visual difference matters because the MG 1100's proportions are closely tied to its wheel-and-tire package. A restorer choosing between the two should think about stance, sidewall impression, and whether the finished car is meant to read as strictly period-style or as a tasteful vintage driver with a radial setup.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1967 MG 1100?
Yes, modifications can affect tire fitment on a 1967 MG 1100 even though both primary tire sizes use 12-inch rims. Aftermarket wheels, altered wheel width, suspension changes, or body modifications can change how a 145R12 radial or 5.50-12 bias-ply sits in the wheel opening and how much clearance remains in normal driving.
That is why the actual car should be checked instead of relying on size alone. A compact sedan leaves less margin for error than a larger vehicle, so it is worth turning the steering from lock to lock, checking fender and suspension clearance, and confirming that the wheel dimensions still suit the intended tire.
What should I inspect before driving a 1967 MG 1100 on new tires?
Before driving a 1967 MG 1100 on new tires, inspect the wheels for damage or corrosion, confirm the wheel diameter and width, and make sure the tires are mounted in the correct size and construction for the car's setup. It is also wise to look over the steering, suspension, and alignment on a vintage compact car.
A road check should include tire pressure, visible clearance around the fenders and suspension, and a close look for any rubbing during slow-speed steering movement. On an older collector vehicle, this first inspection matters because even a properly sized tire can be affected by worn components or long-neglected chassis adjustments.
How should tires on a collector 1967 MG 1100 be maintained?
Tires on a collector 1967 MG 1100 should be inspected regularly for cracking, cuts, bulges, uneven wear, and gradual air loss, especially if the car is driven infrequently. Collector cars often age their tires through time and storage conditions rather than mileage alone, so visual condition matters as much as tread depth.
Proper storage also helps preserve the tire and wheel package on a lightly used car. Keeping the MG away from prolonged sunlight, heat, moisture, and ozone sources is beneficial, and periodic checks of pressure and general condition make it easier to catch age-related issues before the car goes back on the road.
