The 2010 Mazda RX-8 stands out as one of the last rotary-powered sports cars of its era, combining sharp handling, a high-revving character, and the distinctive four-door coupe layout that made the model feel different from almost anything else on the road. Tire selection matters because this RX-8 uses two different primary radial fitments depending on sub-model: 225/45R18 or 225/40R19. That means the first step is confirming whether the car is a Sport, Grand Touring, or R3. From there, the choice is less about vintage-style construction and more about matching the correct rim diameter, comparing available performance-oriented tire series, and preserving the car's intended stance and response.
Which Tire Size Is Right for The 2010 Mazda RX-8
The 2010 Mazda RX-8 uses two primary tire sizes, and the correct one depends on sub-model and wheel diameter. Sport and Grand Touring models use an 18-inch radial setup, while the R3 uses a 19-inch radial setup. Before comparing tire options, confirm the exact sub-model and verify whether the car still has its original wheel size, since that determines which fitment belongs on the vehicle.
225/45R18 is a modern metric radial size in which 225 identifies the nominal section width in millimeters, 45 is the aspect ratio, R indicates radial construction, and 18 is the wheel diameter in inches. On the 2010 Mazda RX-8, this size is used on 18-inch-wheel configurations rather than across every sub-model. Available choices include BFGoodrich and Nitto options in blackwall form, with series such as g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2. This size is the right place to focus if the car retains the 18-inch setup and the goal is to compare performance-oriented radial choices within that fitment.
225/40R19 follows the same modern metric radial format, with a 225-millimeter nominal width, a 40-series profile, radial construction, and a 19-inch rim diameter. On the 2010 Mazda RX-8, this size applies to the 19-inch-wheel configuration, so it is tied to a specific sub-model and should not be selected simply because the overall width appears similar to the 18-inch option. Product choices include BFGoodrich blackwall tires in the g-Force Comp 2 AS and g-Force Phenom T/A series. This size should be evaluated when the car has the correct 19-inch wheels and the buyer wants to keep the intended low-profile fitment.
Sub-model fitment matters on the 2010 Mazda RX-8 because tire size is not the same across the full range. The key difference is wheel diameter, so identifying whether the car is a Grand Touring, R3, or Sport should come before comparing tire options.
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2010 Mazda RX-8 Grand Touring
The 2010 Mazda RX-8 Grand Touring uses the 225/45R18 radial fitment on an 18-inch wheel. Tire selection for this sub-model centers on staying with that wheel diameter and comparing the available blackwall performance tire series that suit the car's road use and overall setup.
The 2010 Mazda RX-8 R3 uses the 225/40R19 radial fitment on a 19-inch wheel. That makes wheel confirmation especially important, since a buyer should evaluate 19-inch tire options only after confirming the car still carries the proper R3-style wheel diameter.
The 2010 Mazda RX-8 Sport uses the 225/45R18 radial fitment, matching the 18-inch-wheel setup rather than the R3's 19-inch arrangement. That gives the buyer a straightforward path: confirm the existing wheels, then compare the available blackwall radial choices within the correct 18-inch size.
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 2010 Mazda RX-8 Tires for Sale
Available 2010 Mazda RX-8 tire choices center on 225/45R18 and 225/40R19 radial performance tires from BFGoodrich and Nitto. The product grid lets you compare blackwall options across several g-Force series and the NT555 G2, along with rim-width compatibility, weight, and other fitment-related details.
These FAQs focus on the tire sizes used by the 2010 Mazda RX-8, how fitment changes by sub-model, and what to compare when choosing between available radial tire options for 18-inch and 19-inch wheel setups.
Tire Size & Fitment
What tire size fits a 2010 Mazda RX-8?
The 2010 Mazda RX-8 uses either 225/45R18 or 225/40R19, depending on sub-model. Grand Touring and Sport models use 225/45R18, while the R3 uses 225/40R19. Both are radial tire fitments, but they are tied to different wheel diameters, so the correct size depends on the specific version of the car.
Choosing between these sizes starts with confirming the exact sub-model and checking the wheels currently on the car. An RX-8 with replacement wheels may no longer match its original setup, so verify the wheel diameter before ordering tires. That simple check helps avoid selecting a 19-inch tire for an 18-inch car, or the reverse.
What size rim does a 2010 Mazda RX-8 use?
A 2010 Mazda RX-8 uses either an 18-inch or 19-inch rim, depending on sub-model. The 225/45R18 fitment is built for an 18-inch wheel, and the 225/40R19 fitment is built for a 19-inch wheel. That rim diameter difference is the most important fitment distinction across the RX-8 range for this model year.
Wheel diameter should be confirmed at the car, not assumed from appearance alone. The RX-8's low-profile tires can make different wheel sizes look similar at a glance, especially on modified cars. Checking the wheel and tire markings together gives a more reliable starting point before comparing tire series, brand options, or other specifications.
Do all 2010 Mazda RX-8 sub-models use the same tire size?
No. The 2010 Mazda RX-8 does not use one tire size across every sub-model. Grand Touring and Sport models use 225/45R18, while the R3 uses 225/40R19. Both fitments are radial, but the change in wheel diameter means the tire choice is not interchangeable across the whole model line without confirming the wheel setup first.
That distinction matters because a buyer researching RX-8 tires can easily see both sizes and assume either one will work. The practical step is to identify the trim and inspect the car's current wheels. Once the correct wheel diameter is confirmed, comparing the available products becomes much simpler and much less likely to create a fitment mistake.
Choosing the Right Tire
What should I consider when choosing a 225/45R18 tire for a 2010 Mazda RX-8?
Start with the basics: the car must use the 18-inch fitment, which applies to the 2010 Mazda RX-8 Grand Touring and Sport. From there, compare radial tire series, brand options, rim-width compatibility, and any product details that matter to your intended use. In this size, choices include BFGoodrich and Nitto blackwall performance tires.
Selection becomes more about character than basic fitment once the size is confirmed. Some owners may want a road-focused performance radial, while others may simply want a tire that matches the car's existing wheel setup and use pattern. Checking current wheel width, overall condition, and how the car is driven helps narrow the most sensible option.
What brands offer tires for the 2010 Mazda RX-8?
The 2010 Mazda RX-8 has available tire options from BFGoodrich and Nitto in the applicable sizes. BFGoodrich appears in both 225/45R18 and 225/40R19, while Nitto appears in 225/45R18. All of the available products for this RX-8 fitment are radial blackwall tires aimed at modern performance-oriented use.
Brand choice should come after confirming the correct size for the car's sub-model and wheels. Once that is settled, compare the specific tire series offered in that size rather than choosing by brand name alone. Rim-width range, load details where stated, and the way the car is actually driven are more useful than a simple brand preference.
What tire series are available for the 2010 Mazda RX-8?
Available tire series for the 2010 Mazda RX-8 include BFGoodrich g-Force Comp 2 AS, BFGoodrich g-Force Sport Comp 2, BFGoodrich g-Force Phenom T/A, and Nitto NT555 G2. The exact series options vary by size, with the broader selection appearing in 225/45R18 and a more limited group appearing in 225/40R19.
Series names help separate the product choices once the fitment is confirmed, but they should be compared alongside the actual size and wheel requirements. A useful approach is to narrow the correct tire size first, then review the series available in that size for rim-width compatibility, stated load details, and the kind of street use the RX-8 will actually see.
Restoration & Appearance
Which tire should I choose for a period-style 2010 Mazda RX-8?
A period-style 2010 Mazda RX-8 still begins with the correct modern radial size for the sub-model: 225/45R18 for Grand Touring and Sport, or 225/40R19 for R3. Because this is a late-production sports car, the visual starting point is already a low-profile radial look rather than a vintage bias-ply or wide-whitewall presentation.
Appearance choices are more restrained here, since the available products are blackwall radials rather than overtly nostalgic sidewall styles. The most convincing result usually comes from keeping the proper wheel diameter and tire proportions for the trim level. Owners chasing exact showroom-era appearance should also compare wheel design and overall stance, not just the tire size alone.
Does correct tire fitment matter for a 2010 Mazda RX-8 restoration?
Yes, correct tire fitment matters on a 2010 Mazda RX-8 restoration because the car's stance, wheel-to-tire proportion, and handling character depend on using the proper size for the sub-model. The difference between 225/45R18 and 225/40R19 is not just a number change; it reflects two distinct wheel-diameter setups within the RX-8 range.
A restoration-minded owner should match the tire size to the actual trim and wheel package before focusing on brand or series. That helps preserve the car's intended visual balance and avoids an incorrect profile that can change how the RX-8 sits. When originality matters closely, trim-specific reference photos and marque-community guidance can be worthwhile cross-checks.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2010 Mazda RX-8?
Yes. Modifications can affect tire fitment on a 2010 Mazda RX-8 even when the tire size looks close to the original specification. Aftermarket wheels, altered wheel width, suspension changes, lowered ride height, or body modifications can all change clearance at the fender, suspension, or steering range, especially on a low-profile sports-car setup.
An RX-8 that has been changed from stock should be checked at the car before choosing between the two original fitments or comparing products within one size. Wheel diameter is only part of the picture. Wheel width, offset, and actual clearance under compression and full steering lock are just as important when the car no longer matches its original configuration.
What should I inspect before driving a 2010 Mazda RX-8 on new tires?
Before driving a 2010 Mazda RX-8 on new tires, inspect wheel condition, confirm correct tire size, and verify that the tires are mounted on the proper rim diameter and suitable wheel width. It also helps to check inflation pressure, valve condition, lug torque, and overall clearance so the tire is not contacting suspension or bodywork.
A short, careful test drive is a smart follow-up once the tires are installed. Listen for rubbing, note any steering pull or vibration, and recheck pressures after the first drive. On a car like the RX-8, a small fitment issue can show up quickly because the tire profiles are relatively low and wheel-to-body clearance can be tighter than on taller-tire applications.
How often should tires on a 2010 Mazda RX-8 be inspected?
Tires on a 2010 Mazda RX-8 should be inspected regularly, especially if the car is driven infrequently or stored for part of the year. Look for uneven wear, cuts, punctures, air loss, sidewall damage, and any signs of aging. Low-profile radial tires can still deteriorate from time, storage conditions, and underinflation even when tread remains.
A quick visual check before longer drives is sensible, and a closer inspection during routine maintenance is even better. Pay attention to tires that have spent long periods parked, since collector-owned or lightly used cars can age their tires without accumulating many miles. Pressure consistency and sidewall condition are often just as important as tread depth on that kind of vehicle.
