The 2019 BMW M240i sits in the modern compact performance coupe tradition, blending everyday usability with the sharper responses enthusiasts expect from BMW’s M Performance lineup. Whether in Coupe or Convertible form, it rewards careful tire selection because the chassis depends heavily on a staggered 18-inch radial setup. Front fitment centers on 225/40R18, while the rear uses 245/35R18. That means the real choice is not just size, but also how each tire’s series, construction details, and road-focused character suit the way the car is driven. For stock-style fitment, matching the correct front and rear sizing is the first priority before comparing product differences.
Which Tire Size Is Right for The 2019 BMW M240i
The 2019 BMW M240i uses two primary tire sizes, both in radial construction on 18-inch rims. The key step is identifying whether you are selecting a front or rear tire, since this BMW uses a staggered setup with 225/40R18 in front and 245/35R18 in the rear across the covered Coupe and Convertible configurations.
Fit(s): Convertible, Convertible Front, Coupe, and Coupe Front
Construction: Radial|Rim: 18 in
225/40R18 is a metric radial size in which 225 identifies nominal section width in millimeters, 40 is the aspect ratio, R designates radial construction, and 18 is the wheel diameter in inches. On the 2019 BMW M240i, this size serves the front position in the staggered setup, so it plays a major role in steering response and overall balance. Available choices include BFGoodrich and Nitto, with blackwall sidewalls and several g-Force and NT555 G2 series options. This is the size to evaluate when replacing the front pair while keeping stock-style sizing and wheel diameter in place.
245/35R18 is a metric radial size with a 245-millimeter nominal section width, a 35-series profile, radial construction, and an 18-inch rim diameter. On the 2019 BMW M240i, this is the rear tire size in the staggered arrangement, giving the back of the car a wider fitment than the front. The available option shown here uses a blackwall sidewall and the BFGoodrich g-Force Phenom T/A series. This is the size to confirm when replacing rear tires and maintaining the intended front-to-rear sizing relationship on the car.
Fitment is straightforward once the layout is understood, because the covered 2019 BMW M240i sub-models share the same staggered tire strategy. What matters most is confirming whether you are choosing tires for the complete vehicle, the front position, or the rear position before selecting a size.
1
2019 BMW M240i Convertible
The 2019 BMW M240i Convertible follows the same staggered radial fitment pattern used across this model line, with a narrower front tire and a wider rear tire on 18-inch wheels. Tire selection starts with choosing the correct axle position so the car keeps its intended sizing relationship and overall stance.
The 2019 BMW M240i Convertible Front uses the front tire size in the M240i staggered setup and keeps the car on radial construction with an 18-inch rim. Front tire replacement should focus on matching the correct size first, then comparing available series and brand options for the desired road feel.
The 2019 BMW M240i Convertible Rear uses the wider rear tire size that completes the staggered arrangement on this model. Rear tire selection should preserve the intended front-to-rear sizing balance and include a quick check of wheel width and overall clearance before installation.
The 2019 BMW M240i Coupe uses the same staggered radial fitment approach as the Convertible, with separate front and rear tire sizes on 18-inch wheels. Choosing tires for the Coupe means confirming axle position first, then comparing the available tire series within the proper size.
The 2019 BMW M240i Coupe Front uses the designated front tire size in the model’s staggered radial setup. Keeping the correct front size is important when comparing BFGoodrich and Nitto options, especially if the goal is to maintain the car’s intended handling balance.
The 2019 BMW M240i Coupe Rear uses the wider rear tire size that pairs with the front fitment in the stock-style staggered layout. Rear replacement should concentrate on the correct size and wheel compatibility so the tire works properly with the existing front and rear setup.
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 2019 BMW M240i Tires for Sale
Available 2019 BMW M240i tire choices focus on 18-inch radial performance fitments from BFGoodrich and Nitto. The front 225/40R18 size offers the widest comparison across blackwall performance series, while the rear 245/35R18 selection stays focused on maintaining the proper staggered setup.
These FAQs cover the tire sizes used on the 2019 BMW M240i, how the staggered 18-inch setup works, and what to compare when choosing front and rear replacement tires for road use, appearance, and fitment consistency.
Tire Size & Fitment
What tire size fits a 2019 BMW M240i?
The 2019 BMW M240i uses a staggered tire setup with 225/40R18 in the front and 245/35R18 in the rear. Both are radial tires mounted on 18-inch wheels, so the car does not use the same size at all four corners in the covered configurations.
That front-to-rear difference matters when replacing tires, because choosing the wrong position can upset the intended sizing balance. It helps to confirm whether the tire is for the front axle or rear axle, then check the actual wheel setup on the car in case aftermarket wheels or previous changes altered the original arrangement.
What size rim does a 2019 BMW M240i use?
The covered 2019 BMW M240i tire sizes use an 18-inch rim diameter. Both 225/40R18 and 245/35R18 are built for 18-inch wheels, even though the front and rear tire widths and profiles differ as part of the staggered fitment.
Rim diameter is only the first checkpoint. Wheel width still matters, especially on a performance car with different front and rear tires, so it is worth confirming the actual wheel dimensions before choosing a replacement. That becomes even more important if the car has non-stock wheels, spacers, or suspension changes that affect clearance.
Do all 2019 BMW M240i sub-models use the same tire size?
The covered 2019 BMW M240i Coupe and Convertible share the same overall staggered setup, with 225/40R18 used at the front and 245/35R18 used at the rear. The difference is by axle position rather than by Coupe versus Convertible body style.
That makes selection fairly straightforward once the tire’s location on the car is clear. A buyer replacing a full set should preserve the front and rear size split, while someone replacing only one axle should verify that the remaining tires still match the intended setup and that the wheel widths are appropriate for each position.
Choosing the Right Tire
What should I consider when choosing a 225/40R18 and 245/35R18 tire for a 2019 BMW M240i?
Start with position-specific fitment, because the 2019 BMW M240i uses 225/40R18 in front and 245/35R18 in the rear. From there, compare construction, tire series, rim-width compatibility, weight, and any stated load figures so the replacement matches the way the car is set up and driven.
Appearance is simpler here because the available choices use blackwall sidewalls, so the bigger decision is usually series and brand within the correct size. Front and rear choices should also work together as a set, especially on a staggered car where inconsistent sizing or mismatched specifications can change the vehicle’s overall balance and feel.
What brands offer tires for the 2019 BMW M240i?
Tires for the covered 2019 BMW M240i sizes are available from BFGoodrich and Nitto. BFGoodrich appears in both the front and rear fitments, while Nitto is represented in the 225/40R18 front size through the NT555 G2 series.
Brand alone should not make the decision. It helps to compare which brand offers the needed size for the correct axle, then review the tire series, rim-width specifications, weight, and any load information tied to that tire. That approach is especially useful on a staggered setup where front and rear availability may not be equally broad.
What tire series are available for the 2019 BMW M240i?
The available series for the 2019 BMW M240i include BFGoodrich g-Force Comp 2 AS, BFGoodrich g-Force Sport Comp 2, Nitto NT555 G2, and BFGoodrich g-Force Phenom T/A. The front 225/40R18 size has the greatest variety, while the rear 245/35R18 fitment is shown here in g-Force Phenom T/A.
Series differences give the buyer a practical way to compare options within the correct size instead of focusing only on brand. For a front tire purchase, there is more room to compare product character and specifications, while rear replacement is more focused on maintaining the proper size and compatibility with the existing staggered package.
Restoration & Appearance
Which tire should I choose for a period-style 2019 BMW M240i?
A period-style approach on a 2019 BMW M240i still begins with keeping the correct staggered sizing: 225/40R18 in front and 245/35R18 in the rear. Since the available options shown here are all modern radial blackwall tires, the choice is more about preserving the car’s contemporary performance appearance than recreating an older vintage tire look.
The most convincing result usually comes from maintaining the proper axle-specific sizing and using tire models that suit the car’s factory-era character. Buyers who want a particularly exact visual presentation should also compare tread style, sidewall detailing, and overall stance against original delivery photos, marque references, or other vehicle-specific documentation.
How does tire construction affect the appearance of a restored 2019 BMW M240i?
On a 2019 BMW M240i, tire construction is straightforward because the covered fitments are radial. That means appearance differences are less about bias-ply versus radial and more about keeping the correct low-profile front and rear sizes that give the car its intended modern sport-compact stance.
A tire that matches the proper 18-inch staggered layout will usually preserve the visual balance far better than one chosen only by wheel diameter. Sidewall profile and width relationship matter on this BMW, so using the right 225/40R18 front and 245/35R18 rear combination is the clearest way to maintain a restoration-minded, stock-style presentation.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2019 BMW M240i?
Yes, modifications can affect tire fitment on a 2019 BMW M240i even when the tire sizes remain 225/40R18 in front and 245/35R18 in the rear. Aftermarket wheels, spacers, altered ride height, alignment changes, and suspension work can all influence clearance, steering travel, and how the tire sits in the wheel opening.
A car with changes from stock should have wheel width and offset checked before replacement tires are chosen. It also helps to inspect inner fender and suspension clearance at full steering lock and under compression, since a staggered setup leaves less room for assumptions than a square four-tire arrangement.
What should I inspect before driving a 2019 BMW M240i on new tires?
Before driving a 2019 BMW M240i on new tires, inspect tire pressure, wheel condition, lug hardware, tread direction if applicable, and front-versus-rear size placement. The car’s staggered setup makes correct positioning especially important, since swapping front and rear sizes is not part of the intended fitment.
A short visual check after installation can prevent bigger problems. Look for sidewall contact, uneven seating on the rim, or any sign that the tire is too close to suspension or body components. After a brief road test, recheck pressure and listen for rubbing so any fitment issue is caught early.
How often should tires on a 2019 BMW M240i be inspected?
Tires on a 2019 BMW M240i should be inspected regularly, not just when tread appears low. A quick check for pressure loss, cuts, bulges, irregular wear, and visible sidewall damage is worthwhile before routine driving, especially on a performance car that depends on correct front and rear sizing.
Longer intervals between drives can make condition checks even more important. Cars that sit for periods may develop flat spotting, air loss, or age-related deterioration that is easy to miss at a glance. Frequent inspection also helps catch alignment or suspension issues early if one end of the staggered setup begins wearing differently than the other.
