The 2013 BMW 640i Gran Coupe blends the long-hood grand touring character of the 6 Series with the added practicality and sleek roofline of a four-door coupe. It is a modern BMW that still asks for careful tire selection, especially because fitment changes with wheel package and, on staggered setups, between front and rear positions. This model uses radial tires in several metric sizes across 18-inch, 19-inch, and 20-inch rim diameters. Available choices center on blackwall performance-oriented tire lines from BFGoodrich and Nitto. The key is matching the exact wheel and axle position first, then choosing the tire series that suits the car's intended road use and overall setup.
Which Tire Size Is Right for The 2013 BMW 640i Gran Coupe
The 2013 BMW 640i Gran Coupe uses five primary tire sizes, and the correct one depends on whether the car has the standard 18-inch setup or a staggered 19-inch or 20-inch front-and-rear arrangement. Start by confirming the wheel diameter, then verify whether you are selecting a front or rear tire, since the wider rear sizes do not serve the same role as the front fitments.
245/45R18 is a metric radial size in which 245 identifies the section width in millimeters, 45 is the aspect ratio, R indicates radial construction, and 18 is the wheel diameter in inches. On the 2013 BMW 640i Gran Coupe, this size serves the standard single-size setup rather than a staggered front-and-rear arrangement. Available tires in this size come from BFGoodrich and Nitto, with blackwall sidewalls and performance-oriented 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 when the car retains its 18-inch wheels and a matching tire is needed at all four corners.
245/35R20 is a metric radial size that uses a 245-millimeter section width, a 35-series profile, radial construction, and a 20-inch rim. On the 2013 BMW 640i Gran Coupe, this is a front-position fitment for the staggered 20-inch setup, so it should be considered together with the matching rear size rather than as a universal replacement. BFGoodrich and Nitto both offer blackwall options here, including g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2. Choose this size only after confirming the car is running the 20-inch front wheel package and not the 18-inch or 19-inch arrangement.
245/40R19 follows the same metric radial pattern: 245 millimeters of nominal section width, a 40-series profile, radial construction, and a 19-inch wheel diameter. For the 2013 BMW 640i Gran Coupe, this size is used on the front axle of the staggered 19-inch setup, where it pairs with a wider rear tire. Tire choices in this size center on BFGoodrich blackwall offerings, including g-Force Sport Comp 2, g-Force Comp 2 AS, and g-Force Phenom T/A. It is the correct front-size starting point when the car wears 19-inch staggered wheels and the goal is to preserve the intended front-to-rear fitment relationship.
275/30R20 is a wider metric radial size with a 275-millimeter section width, a 30-series profile, radial construction, and a 20-inch rim diameter. On the 2013 BMW 640i Gran Coupe, this size belongs to the rear position of the staggered 20-inch package, where it complements the narrower 245/35R20 front tire. The available product choice in this size is the Nitto NT555 G2, presented as a blackwall radial performance tire. This rear fitment matters most when replacing a matched staggered set, since width, wheel diameter, and axle location all need to stay aligned with the existing setup.
275/35R19 uses the same metric radial naming structure, with 275 millimeters of nominal section width, a 35-series profile, radial construction, and a 19-inch wheel diameter. For the 2013 BMW 640i Gran Coupe, this is the rear size in the staggered 19-inch arrangement and is not intended to substitute for the front tire size. Available blackwall choices include BFGoodrich g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and the Nitto NT555 G2. This is the size to evaluate when the car already runs 19-inch staggered wheels and the rear axle needs the correct wider fitment.
Sub-model fitment on the 2013 BMW 640i Gran Coupe is straightforward once the wheel package and axle position are identified. The standard Base setup uses one size, while the Front and Rear staggered fitments separate the narrower front tires from the wider rear tires on 19-inch and 20-inch wheels.
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2013 BMW 640i Gran Coupe Base
The Base configuration uses a single radial tire size rather than a staggered front-and-rear pairing. That simplifies selection, but the wheel diameter still needs to match the 18-inch setup before comparing among available blackwall performance tire series.
The Base Front fitment covers the front axle of the staggered-wheel configurations, using one radial size for the 19-inch setup and another for the 20-inch setup. Tire selection starts with confirming wheel diameter, then choosing the front tire series that matches the car's existing staggered arrangement.
The Base Rear fitment applies to the wider rear tires used with staggered 19-inch and 20-inch wheel packages. Rear tire choice should stay tied to the exact wheel diameter and paired front size so the car keeps its intended staggered fitment relationship.
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 2013 BMW 640i Gran Coupe Tires for Sale
Available 2013 BMW 640i Gran Coupe tires focus on radial blackwall performance options from BFGoodrich and Nitto. Across the 18-inch, 19-inch, and 20-inch sizes, buyers can compare g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2 lines, with rim-width compatibility varying by size.
BMW 640i Gran Coupe owners usually need to sort out wheel diameter, front-versus-rear staggered fitment, and differences between the available radial tire lines. These FAQs focus on exact size selection, rim fitment, product choice, and practical checks before road use.
Tire Size & Fitment
What tire size fits a 2013 BMW 640i Gran Coupe?
The 2013 BMW 640i Gran Coupe uses 245/45R18, 245/40R19, 275/35R19, 245/35R20, and 275/30R20 tire sizes. The 245/45R18 size serves the standard setup, while the 19-inch and 20-inch sizes are used in staggered front-and-rear combinations with narrower front tires and wider rear tires.
Choosing the right size starts with the wheel diameter already on the car, then the axle position. A 19-inch or 20-inch staggered setup means the front and rear tires are not interchangeable, so checking the existing wheel package before replacement is more important than comparing tire lines first.
What size rim does a 2013 BMW 640i Gran Coupe use?
The 2013 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 should be confirmed before anything else because the tire sizes are tied directly to those rim sizes. On staggered 19-inch and 20-inch setups, the front and rear tires also differ in width and profile, so both the wheel diameter and the wheel position need to be verified before ordering replacements.
Why does the 2013 BMW 640i Gran Coupe have more than one tire size?
More than one tire size appears because the 2013 BMW 640i Gran Coupe was fitted with different wheel packages. One configuration uses 245/45R18 at all four corners, while the 19-inch and 20-inch packages use staggered sizing with a narrower front tire and a wider rear tire.
That means tire selection depends on the exact setup on the car rather than the model name alone. Looking at the sidewall of the existing tires or measuring the wheel diameter is the fastest way to confirm whether the car uses the standard 18-inch arrangement or one of the staggered packages.
Choosing the Right Tire
What should I consider when choosing a tire for a 2013 BMW 640i Gran Coupe?
Start with the correct tire size, wheel diameter, and axle position. The 2013 BMW 640i Gran Coupe can use a square 18-inch setup or staggered 19-inch and 20-inch combinations, so the first decision is fitment, followed by the tire line that best matches the car's intended use.
After size is confirmed, compare construction details such as rim-width compatibility, load figures where stated, and the character of the available tire series. A car used mainly for everyday road driving may call for a different choice than one emphasizing a more aggressive performance-oriented setup on larger wheels.
What brands offer tires for the 2013 BMW 640i Gran Coupe?
Tires for the 2013 BMW 640i Gran Coupe are available from BFGoodrich and Nitto. Depending on size, the available series include BFGoodrich g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and the Nitto NT555 G2.
Brand choice should come after confirming the exact size on the car, especially on staggered setups where front and rear fitments differ. Once fitment is settled, the comparison becomes more about the available series, rim-width range, and how each tire aligns with the car's wheel package and intended use.
What tire series are available for the 2013 BMW 640i Gran Coupe?
The available tire series for the 2013 BMW 640i Gran Coupe include BFGoodrich g-Force Comp 2 AS, BFGoodrich g-Force Sport Comp 2, BFGoodrich g-Force Phenom T/A, and Nitto NT555 G2. Not every series appears in every size, so the exact wheel package influences which comparisons are possible.
Series selection matters most after the correct size is locked in. A buyer replacing 245/45R18 tires has a broader mix of BFGoodrich and Nitto options than someone replacing 275/30R20 rear tires, where the available choice is narrower and must stay matched to the staggered wheel arrangement.
Restoration & Appearance
Which tire should I choose for a period-style 2013 BMW 640i Gran Coupe?
A period-style approach on a 2013 BMW 640i Gran Coupe usually begins with keeping the original wheel diameter and the same front-to-rear fitment strategy already on the car. Since the available options here are modern radial blackwall tires, the look remains contemporary and appropriate to the Gran Coupe's design era.
Appearance choices are less about whitewalls or vintage sidewall treatments and more about preserving the proper stance of the 18-inch, 19-inch, or 20-inch setup. Keeping the correct front and rear sizes on staggered configurations helps the car retain the visual balance BMW intended for this generation.
Does correct tire fitment matter for a 2013 BMW 640i Gran Coupe restoration?
Correct tire fitment matters because wheel diameter, profile, and staggered sizing all influence how a 2013 BMW 640i Gran Coupe sits and presents. Using the proper 18-inch, 19-inch, or 20-inch fitment preserves the car's overall proportions much better than choosing a size simply because it mounts on the wheel.
For an appearance-focused project, the most important step is verifying what wheel package the car actually carries today. Cars that have changed wheels during ownership may no longer reflect their original setup, so matching tire size to the existing wheels should come before deciding among the available radial tire series.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2013 BMW 640i Gran Coupe?
Yes. Wheel changes, suspension alterations, lowering, and spacer use can all affect tire fitment on a 2013 BMW 640i Gran Coupe, especially on the staggered 19-inch and 20-inch setups. Even when the tire size is correct in general terms, changes to the car can alter clearance at the fender, suspension, or steering components.
A modified car should be checked at the exact wheel diameter and axle position before replacement tires are chosen. Front tire clearance during full steering lock and rear clearance under load are both worth confirming, particularly when the car no longer uses its original wheels or ride height.
What should I inspect before driving a 2013 BMW 640i Gran Coupe on new tires?
Check that each tire matches the correct front or rear size, the wheel diameter, and the intended mounting position. Tire pressure, wheel condition, valve stems, tread seating, and any visible signs of rubbing or uneven clearance should all be reviewed before the car is put back into regular road use.
A short initial drive followed by a second inspection is a smart step on a Gran Coupe with staggered fitment. Rechecking pressure and looking for contact marks near the inner fender or suspension helps confirm that the selected tire works properly with the car's actual wheel and alignment setup.
What should I check before a longer drive in a 2013 BMW 640i Gran Coupe?
Before a longer drive, confirm tire pressure, inspect for cuts, bulges, or irregular wear, and make sure the car is wearing the correct size at each wheel position. On the 2013 BMW 640i Gran Coupe, that is especially important when front and rear sizes differ, since a staggered setup depends on keeping each tire in its proper place.
It also helps to inspect wheel condition and verify that no slow air loss has developed after mounting. Any vibration, pull, or rubbing noticed during local driving should be addressed before a trip, because those early signs often point to balance, alignment, or clearance issues that deserve attention first.
