The 1981 Mazda RX-7 sits firmly in the early rotary sports-car era, when light weight, compact dimensions, and sharp handling helped define the car’s appeal. For owners today, tire choice has a real effect on how that character is preserved, whether the goal is stock-style road manners or a more appearance-driven restoration. This RX-7 uses radial tires on 13-inch rims, with 185/70R13 and 165R13 fitments depending on sub-model. That opens the door to different approaches, from blackwall sport-oriented radials to period-style redline or wide whitewall treatments in 185/70R13. The right choice starts with confirming the exact sub-model and wheel setup on the car.
Which Tire Size Is Right for The 1981 Mazda RX-7
The 1981 Mazda RX-7 uses two primary tire sizes, and the correct one depends on the exact sub-model. Both are radial tires for 13-inch rims, but they represent different sizing conventions and different fitment paths within the RX-7 lineup. Before choosing a tire, confirm whether the car is an S, GS, GSL, or an aluminum-wheel variant so the correct size and product style can be matched to the vehicle.
Fit(s): GS, GS w/aluminum wheels, GSL, GSL w/aluminum wheels, S, and S w/aluminum wheels
Construction: Radial|Rim: 13 in
185/70R13 is a metric radial size that uses a 185 millimeter nominal section width, a 70-series aspect ratio, and a 13-inch rim diameter. On the 1981 Mazda RX-7, this size is a primary fitment used across GS and GSL models and also appears on S configurations. Product choices in this size include BFGoodrich, Avon, Dunlop, Michelin, and Vredestein, with blackwall, redline, and wide whitewall sidewall treatments depending on the tire series. It is the size to evaluate when the car has the broader 13-inch fitment used on much of the RX-7 range.
165R13 is a Euro-metric radial size with a 165 millimeter nominal section width, radial construction, and a 13-inch rim diameter. In this format, no aspect ratio is stated in the size itself, and it is commonly understood as a classic Euro-metric radial style. On the 1981 Mazda RX-7, this size is associated with S models rather than the full model range. Available choices center on blackwall sport-touring style radials from Michelin and Dunlop, making it a strong fitment to review carefully when confirming an S-model wheel and tire setup.
Sub-model fitment matters on the 1981 Mazda RX-7 because not every version uses the same tire size. GS and GSL models stay with one clear radial fitment, while S models can be associated with either of the RX-7’s two 13-inch radial sizes, so the exact sub-model and wheel setup should be confirmed before selecting tires.
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1981 Mazda RX-7 GS
The 1981 Mazda RX-7 GS uses the 185/70R13 radial tire size. That keeps tire selection focused on choosing the right brand, tire series, and sidewall appearance within that size rather than sorting through multiple primary fitments.
The 1981 Mazda RX-7 GS w/aluminum wheels also uses 185/70R13 radial tires. Tire choice here comes down to selecting the type of 13-inch radial that best matches the car’s appearance goals and intended road use.
The 1981 Mazda RX-7 GSL uses the 185/70R13 radial size. That gives the owner access to several blackwall options along with period-style redline and wide whitewall presentations in the same basic fitment.
The 1981 Mazda RX-7 GSL w/aluminum wheels remains on the 185/70R13 radial fitment. The main decision is not the size itself, but which tire series and sidewall style best suit the car’s look and driving purpose.
The 1981 Mazda RX-7 S is associated with both 165R13 and 185/70R13 radial sizes. That makes wheel confirmation especially important, since the tire choice needs to follow the actual 13-inch setup on the car rather than the model name alone.
The 1981 Mazda RX-7 S w/aluminum wheels can use either 165R13 or 185/70R13 radial tires. Before choosing among available blackwall, redline, or wide whitewall options, verify which size is currently matched to the car’s wheel configuration.
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 1981 Mazda RX-7 Tires for Sale
Available 13-inch radial choices for the 1981 Mazda RX-7 span BFGoodrich, Avon, Dunlop, Michelin, and Vredestein. Depending on size, buyers can compare sport-oriented blackwalls, restoration-style redlines, wide whitewalls, and several distinct tire series with different rim-width specifications.
These FAQs focus on the 1981 Mazda RX-7’s two 13-inch radial tire sizes, sub-model fitment differences, available tire styles, and the wheel, clearance, and maintenance checks worth making before putting the car back on the road.
Tire Size & Fitment
What tire size fits a 1981 Mazda RX-7?
The 1981 Mazda RX-7 uses two primary tire sizes: 185/70R13 and 165R13. Both are radial tires for 13-inch rims, but they do not apply uniformly across every sub-model. GS and GSL versions use 185/70R13, while S models can be associated with either 165R13 or 185/70R13.
That means the first step is confirming the exact sub-model and the actual wheel setup on the car. A surviving RX-7 may also have had wheels changed over time, so matching the tire to the installed 13-inch rim and the car’s present configuration is more useful than relying on the badge alone.
What size rim does a 1981 Mazda RX-7 use?
The 1981 Mazda RX-7 uses 13-inch rims with both of its primary tire sizes. The two fitments, 185/70R13 and 165R13, share that same basic rim diameter, so the key difference is the tire size itself rather than a change from one wheel diameter to another.
Rim diameter is only part of the picture, though. Rim width can still matter when comparing individual tires, especially across different brands and tire series, so it is smart to confirm the wheel dimensions before mounting a new set on a car that may have been altered over the years.
Do all 1981 Mazda RX-7 sub-models use the same tire size?
No, not all 1981 Mazda RX-7 sub-models use the same tire size. GS, GS w/aluminum wheels, GSL, and GSL w/aluminum wheels use 185/70R13, while S and S w/aluminum wheels are associated with both 165R13 and 185/70R13 radial fitments.
That variation makes the sub-model especially important when replacing tires. On S models, it is worth checking the tires already on the car, the wheel width, and any past wheel changes before ordering, because both sizes are 13-inch radials but they are not the same fitment choice.
Choosing the Right Tire
What should I consider when choosing a 185/70R13 tire for a 1981 Mazda RX-7?
Start with the fact that 185/70R13 is a primary RX-7 fitment used across several 1981 sub-models. From there, compare the available radial choices by brand, tire series, sidewall style, rim-width specification, and any load information that is relevant to the way the car will be driven.
Some 185/70R13 options lean toward a sportier blackwall presentation, while others offer redline or wide whitewall styling for a more period-style look. The best match depends on whether the goal is preserving a classic early-1980s sports-car appearance, emphasizing road use, or balancing both on the installed 13-inch wheels.
What sidewall styles are available for 1981 Mazda RX-7 tires?
Sidewall choice varies by tire size, but the 1981 Mazda RX-7 has meaningful variety. In 185/70R13, available sidewall styles include blackwall, redline, and wide whitewall. In 165R13, the available choices are blackwall radials, which keeps the visual approach simpler for that size.
That makes sidewall treatment a real styling decision for RX-7 owners using 185/70R13. A blackwall usually keeps the car closer to a straightforward sports-car presentation, while redline or wide whitewall options create a more customized or restoration-oriented look without changing the underlying tire size.
What brands offer tires for the 1981 Mazda RX-7?
Tire choices for the 1981 Mazda RX-7 include BFGoodrich, Avon, Dunlop, Michelin, and Vredestein, depending on size. The broader 185/70R13 fitment has the widest brand spread, while 165R13 centers on Michelin and Dunlop offerings in a classic blackwall radial format.
Brand alone should not be the only filter. It helps to compare which size each brand supports, the tire series available in that size, sidewall presentation, and rim-width compatibility. That approach keeps the selection focused on the RX-7’s actual fitment needs instead of treating every 13-inch radial as the same.
Restoration & Appearance
Which tire should I choose for a period-style 1981 Mazda RX-7?
A period-style choice starts with the correct primary size for the exact 1981 Mazda RX-7 sub-model and wheel setup. For many GS and GSL cars, that means 185/70R13, where available tires range from blackwall sport radials to redline and wide whitewall options that create a more vintage presentation.
Appearance goals should guide the final decision after the size is confirmed. A blackwall usually suits a clean early-1980s sports-car look, while a redline or wide whitewall pushes the car in a more personalized direction. When exact originality matters, marque-specific reference material is worth checking before settling on a sidewall style.
How does tire construction affect the appearance of a restored 1981 Mazda RX-7?
On the 1981 Mazda RX-7, the primary fitments are radial tires, so the visual difference comes more from the tire’s series and sidewall treatment than from choosing between bias-ply and radial construction. In practice, the restored look is shaped by size, profile, tread style, and sidewall presentation.
That makes the 185/70R13 offerings especially important for appearance-driven builds, since they include blackwall, redline, and wide whitewall choices. A restoration-minded owner should first preserve the correct size relationship to the car, then choose the sidewall style that best supports the intended era feel and finish.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1981 Mazda RX-7?
Yes, modifications can affect tire fitment on a 1981 Mazda RX-7 even when the tire size itself is correct for the model. Aftermarket wheels, different rim widths, suspension changes, or body alterations can change clearance at the fenders, steering components, or inner wheelhouse.
That is especially important on S models, where both 165R13 and 185/70R13 can come into the picture. A car that has been lowered or fitted with non-stock wheels should be checked for wheel diameter, wheel width, and turning clearance before new tires are mounted and driven on the road.
What should I inspect before driving a 1981 Mazda RX-7 on new tires?
Before driving a 1981 Mazda RX-7 on new tires, inspect the wheels for damage, confirm the tire size matches the car’s actual setup, and make sure the tires are mounted correctly on the 13-inch rims. It also helps to verify inflation pressure, lug torque, and basic clearance at full steering lock.
A collector-era RX-7 deserves a broader look before road use. Check suspension and steering condition, look for rubbing marks, and inspect the old tires that came off the car for uneven wear that might point to alignment or chassis issues. That extra step helps the new tires work as intended.
How should tires on a collector 1981 Mazda RX-7 be maintained?
Tires on a collector 1981 Mazda RX-7 should be inspected regularly for air loss, tread wear, cracking, bulges, cuts, and any signs of age-related deterioration. Because these cars are often driven less than modern daily vehicles, condition matters just as much as tread depth.
Storage habits also make a difference. Keeping the car away from prolonged sunlight, heat, moisture, and ozone sources can help protect the tires between drives. It is also smart to check pressure before each outing and to look over the sidewalls closely after long storage periods or before a longer road trip.
