The 2019 BMW 640i Gran Coupe blends grand-touring comfort with the long, low proportions that define BMW’s four-door coupe approach. It is a modern luxury performance car, so tire selection is less about vintage-style construction and more about matching the exact wheel and axle setup already on the car. This model uses radial tires in several metric sizes, including 18-, 19-, and 20-inch fitments, with staggered front and rear sizing in some configurations. Available choices center on blackwall performance-oriented tires from BFGoodrich and Nitto across several g-Force and NT555 G2 series offerings. The key is confirming the exact sub-model position and wheel diameter before comparing tread and specification differences.
Which Tire Size Is Right for The 2019 BMW 640i Gran Coupe
The 2019 BMW 640i Gran Coupe uses five primary tire sizes, and the right one depends on wheel diameter and whether the car is using a square or staggered setup. Some fitments are tied to the complete Base model, while others are split by front and rear position, so the first step is confirming both the exact wheel size and where the tire is mounted before choosing a replacement.
In 245/40R19, the 245 identifies nominal section width in millimeters, 40 is the aspect ratio, R designates radial construction, and 19 is the rim diameter in inches. This is a modern radial fitment used on a 19-inch wheel, and it appears as both a Base size and a front-position size depending on configuration. Product choices include BFGoodrich options in the g-Force Sport Comp 2, g-Force Comp 2 AS, and g-Force Phenom T/A lines, all in blackwall form. It is the right size to evaluate when the car carries 19-inch front or non-staggered fitment and you want to compare performance-oriented tire series within that setup.
In 245/45R18, the first number is nominal width in millimeters, 45 is the aspect ratio, R marks radial construction, and 18 indicates an 18-inch rim. This size is used on the 2019 BMW 640i Gran Coupe Base and represents one of the standard square-fitment choices for the model. Available products include blackwall tires from BFGoodrich and Nitto, with series such as g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2. This size deserves a closer look when the car is equipped with 18-inch wheels and the goal is staying with the proper overall fitment while comparing all-season and sport-oriented options.
The size 245/35R20 uses a 245-millimeter nominal section width, a 35-series profile, radial construction, and a 20-inch rim diameter. On the 2019 BMW 640i Gran Coupe, this is a front-position size used with a staggered setup rather than a universal fitment for every wheel position. Blackwall choices are available from BFGoodrich and Nitto, including the g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, and NT555 G2 series. This is the size to focus on when replacing the front tires on a 20-inch staggered arrangement and preserving the intended front-to-rear sizing relationship.
A 275/30R20 tire has a 275-millimeter nominal section width, a 30-series profile, radial construction, and a 20-inch rim diameter. For the 2019 BMW 640i Gran Coupe, this size is used at the rear in a staggered setup, so it should be treated as a position-specific fitment rather than a general all-around size. The available product in this size is a blackwall Nitto NT555 G2, aimed at buyers maintaining that 20-inch rear performance fitment. It becomes the correct size to evaluate when the car already uses the matching 20-inch front and rear combination and the rear axle needs the proper wider tire.
In 275/35R19, the 275 is the nominal width in millimeters, 35 is the aspect ratio, R means radial, and 19 is the wheel diameter in inches. This size serves as a rear-position fitment on 19-inch staggered applications for the 2019 BMW 640i Gran Coupe. Available blackwall products include BFGoodrich g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and Nitto NT555 G2, giving the buyer several series to compare. It is the relevant size when replacing the rear tires on a 19-inch staggered setup and keeping the wider rear fitment that pairs with the corresponding front size.
Fitment on the 2019 BMW 640i Gran Coupe changes by configuration, and that matters more here than broad brand preference. Some versions use a square setup, while others separate front and rear tire sizes, so confirming the exact sub-model position is essential before ordering replacements.
1
2019 BMW 640i Gran Coupe Base
The 2019 BMW 640i Gran Coupe Base uses either 245/40R19 or 245/45R18 radial tires, depending on the wheel package on the car. Tire selection starts with confirming whether the vehicle has 18-inch or 19-inch wheels, then comparing available blackwall performance series within the correct size.
The 2019 BMW 640i Gran Coupe Base Front fitment uses either 245/35R20 or 245/40R19 radial tires. That makes wheel diameter and front-axle position the critical checks before choosing a replacement, especially on cars using a staggered front and rear setup.
The 2019 BMW 640i Gran Coupe Base Rear fitment uses either 275/30R20 or 275/35R19 radial tires. Rear tire selection should stay tied to the existing staggered wheel package so the car keeps the proper front-to-rear sizing relationship and wheel compatibility.
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 640i Gran Coupe Tires for Sale
Available 2019 BMW 640i Gran Coupe tires center on blackwall radial performance options from BFGoodrich and Nitto. Depending on size, buyers can compare g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, and NT555 G2 offerings across the model’s 18-, 19-, and 20-inch fitments.
Owners of a 2019 BMW 640i Gran Coupe usually need to confirm exact tire size, wheel diameter, and front-versus-rear fitment before anything else. The questions below focus on sizing, staggered setups, product choice, and the checks that matter before road use.
Tire Size & Fitment
What tire size fits a 2019 BMW 640i Gran Coupe?
The 2019 BMW 640i Gran Coupe uses 245/45R18, 245/40R19, 245/35R20, 275/35R19, and 275/30R20 radial tire sizes. The 245-width sizes are used on the Base model or front position, while the 275-width sizes are rear-position fitments on staggered setups.
The practical question is not simply which size exists, but which one is on the car now. Check the wheel diameter first, then confirm whether the vehicle uses the same size at all four corners or a staggered front and rear arrangement before selecting a replacement tire.
What size rim does a 2019 BMW 640i Gran Coupe use?
The 2019 BMW 640i Gran Coupe uses 18-inch, 19-inch, and 20-inch rim diameters, depending on configuration. The 245/45R18 size fits an 18-inch wheel, the 245/40R19 and 275/35R19 sizes fit 19-inch wheels, and the 245/35R20 and 275/30R20 sizes fit 20-inch wheels.
Wheel diameter is the first fitment check because the tire must match it exactly. After that, confirm whether the car has a square setup or a staggered arrangement, since the correct front and rear tire widths can differ even when the wheel package belongs to the same model.
Why does the 2019 BMW 640i Gran Coupe have more than one tire size?
More than one tire size applies because the 2019 BMW 640i Gran Coupe was fitted with different wheel packages, including 18-inch, 19-inch, and 20-inch setups. It also uses staggered front and rear sizing in some configurations, which is why narrower front and wider rear sizes both appear.
That means replacement tires should be chosen from the car’s actual current setup, not from the full model-wide size list. Looking at the sidewall on each tire and verifying wheel diameter and axle position will prevent mixing square-fitment and staggered-fitment sizes by mistake.
Choosing the Right Tire
What should I consider when choosing a 245/40R19 tire for a 2019 BMW 640i Gran Coupe?
A 245/40R19 tire for the 2019 BMW 640i Gran Coupe should first match the car’s 19-inch wheel setup and the position where it is being used. In this size, choices include BFGoodrich blackwall tires in the g-Force Sport Comp 2, g-Force Comp 2 AS, and g-Force Phenom T/A series.
Selection then comes down to the kind of tire character you want within the proper fitment, along with rim-width compatibility and any load figure shown for the tire. It also helps to confirm whether the car uses this size in a square setup or only at the front on a staggered arrangement.
What brands offer tires for the 2019 BMW 640i Gran Coupe?
BFGoodrich and Nitto both offer tires for the 2019 BMW 640i Gran Coupe, depending on size. BFGoodrich appears across several 18-inch, 19-inch, and 20-inch fitments with multiple g-Force series, while Nitto is available in selected sizes through the NT555 G2 line.
Brand choice should stay secondary to correct fitment. Start by matching the exact tire size and wheel diameter on the car, then compare which brand offers the right series, rim-width compatibility, and specification profile for that particular front, rear, or square-fitment application.
What tire series are available for the 2019 BMW 640i Gran Coupe?
Available tire series for the 2019 BMW 640i Gran Coupe include BFGoodrich g-Force Sport Comp 2, BFGoodrich g-Force Comp 2 AS, BFGoodrich g-Force Phenom T/A, and Nitto NT555 G2. Availability changes by size, so not every series appears in every wheel and axle position.
That makes the series comparison most useful after the exact fitment is confirmed. Once the correct size is established, the buyer can compare which series are offered in that size and decide based on construction details, blackwall presentation, and other product specifications relevant to the car’s setup.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2019 BMW 640i Gran Coupe?
Yes. Modifications can change tire fitment on a 2019 BMW 640i Gran Coupe even when the tire size itself appears correct. Aftermarket wheels, altered offsets, suspension changes, lowering, or body modifications can all affect how much room the tire has at the fender, strut, and steering components.
That is especially important on low-profile 19-inch and 20-inch fitments, and on staggered setups where front and rear sizes differ. A modified car should be checked for wheel width, clearance through full steering travel, and any signs of rubbing before a new tire choice is treated as suitable.
What should I inspect before driving a 2019 BMW 640i Gran Coupe on new tires?
Before driving a 2019 BMW 640i Gran Coupe on new tires, inspect that each tire matches the intended wheel diameter and axle position, then confirm proper inflation and visual condition. It is also wise to verify that the car is not mixing front and rear sizes incorrectly on a staggered setup.
A short close-range inspection should include sidewall condition, bead seating, tread uniformity, and any clearance issue near suspension and fender edges. After the first miles, recheck pressure and look for uneven wear or contact marks, especially on cars with 19-inch or 20-inch performance wheel packages.
What should I check before a longer drive in a 2019 BMW 640i Gran Coupe?
Before a longer drive, make sure the 2019 BMW 640i Gran Coupe has the correct tire sizes installed for its wheel package and that pressures are set consistently. A quick inspection for cuts, bulges, abnormal tread wear, and slow air loss is worthwhile, particularly on low-profile performance sizes.
Longer highway use places more importance on a stable setup, so it helps to confirm that front and rear sizes have not been mixed across a staggered arrangement. Any vibration, pulling, or unusual shoulder wear should be addressed before the trip, since those signs can point to fitment or alignment issues.
