The 2017 BMW 640i Gran Coupe blends grand touring comfort with the low, stretched roofline and road presence that define BMW’s modern four-door coupe formula. At this level, tire fitment is closely tied to wheel package and front-to-rear setup rather than a one-size answer for every car. This model uses radial tires in several staggered and non-staggered sizes, including 18-, 19-, and 20-inch applications. Available choices center on blackwall performance-oriented series from BFGoodrich and Nitto, with the biggest decision being the exact wheel configuration on the car. Matching the correct size to the proper front or rear position matters just as much as choosing the right tread and ride character.
Which Tire Size Is Right for The 2017 BMW 640i Gran Coupe
The 2017 BMW 640i Gran Coupe uses five primary tire sizes, and the right one depends first on the exact wheel package and whether the car uses a staggered front-and-rear setup. Because this model appears with 18-, 19-, and 20-inch rim diameters, confirming the wheel diameter and whether you are buying for the front axle, rear axle, or a square setup is the first step before comparing tire options.
The size 245/45R18 identifies a metric radial tire that is 245 millimeters wide, uses a 45-series aspect ratio, and fits an 18-inch rim. On the 2017 BMW 640i Gran Coupe, this size serves the Base configuration with a non-staggered radial fitment. Available choices are centered on blackwall performance tires from BFGoodrich and Nitto across g-Force and NT555 G2 series. This size is the one to evaluate when the car retains its 18-inch wheel setup and the owner wants to compare brand, tread character, and rim-width compatibility within that package.
The size 245/40R19 is a metric radial with a 245-millimeter section width, a 40-series profile, and a 19-inch rim diameter. On the 2017 BMW 640i Gran Coupe, it appears as a front size in staggered 19-inch applications and also as the tire used on the M Sport configuration. BFGoodrich offers this size in several g-Force series, all in blackwall form. It is the correct size to review when the car has 19-inch front wheels or a 19-inch M Sport setup, rather than the 18-inch Base arrangement or 20-inch staggered package.
The size 275/35R19 is a wider metric radial that uses a 275-millimeter section width, a 35-series profile, and a 19-inch rim. On the 2017 BMW 640i Gran Coupe, this size is used at the rear in the 19-inch staggered setup, pairing with a narrower 245/40R19 front tire. Product choices include blackwall options from BFGoodrich and Nitto in g-Force and NT555 G2 lines. This is the size to consider when replacing rear tires on a staggered 19-inch car, where front and rear positions are not interchangeable and wheel width should be confirmed before selection.
The size 245/35R20 is a metric radial with a 245-millimeter width, a shorter 35-series sidewall, and a 20-inch rim diameter. On the 2017 BMW 640i Gran Coupe, it is used on the front of the 20-inch M Sport staggered arrangement. BFGoodrich and Nitto both appear in this size, with blackwall options across g-Force and NT555 G2 series. This size belongs in the conversation when the car has 20-inch front wheels and the owner wants to preserve the lower-profile look and front-to-rear balance of the larger staggered package.
The size 275/30R20 uses a 275-millimeter width, a very short 30-series sidewall, and a 20-inch rim diameter in radial construction. On the 2017 BMW 640i Gran Coupe, this is the rear tire size for the 20-inch staggered M Sport setup, paired with 245/35R20 in front. The available product choice here is a blackwall Nitto NT555 G2. This is the size to verify when replacing rear tires on a 20-inch package, especially because the combination of wider section width and low-profile sidewall makes wheel fit and rear clearance more setup-sensitive.
Sub-model fitment on the 2017 BMW 640i Gran Coupe varies by wheel package and by front-versus-rear position on staggered setups. Checking the exact sub-model name matters here, because some versions use a single 18-inch or 19-inch size while others split into different front and rear sizes on 19-inch or 20-inch wheels.
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2017 BMW 640i Gran Coupe Base
The 2017 BMW 640i Gran Coupe Base uses a straightforward 245/45R18 radial fitment. That makes tire selection more about choosing among the available blackwall performance-oriented options for the 18-inch setup than sorting through a staggered front-and-rear pairing.
The 2017 BMW 640i Gran Coupe Base Front uses 245/40R19 in radial construction. This front-position fitment means the tire should be matched to the correct axle and paired with the proper rear size rather than treated like a square setup.
The 2017 BMW 640i Gran Coupe Base Rear uses 275/35R19, a wider rear radial size than the corresponding front tire. That rear-specific fitment is important when replacing only two tires, since wheel width and front-to-rear stagger need to remain consistent.
The 2017 BMW 640i Gran Coupe M Sport uses 245/40R19 as a radial fitment in this configuration. Selection in this size comes down to comparing available blackwall tire series and confirming that the car is on the 19-inch arrangement rather than the 20-inch staggered setup.
The 2017 BMW 640i Gran Coupe M Sport Front can use either 245/35R20 or 245/40R19 depending on wheel package. That makes front-wheel diameter the key checkpoint before choosing a tire, especially since the sidewall profile changes noticeably between the 19-inch and 20-inch versions.
The 2017 BMW 640i Gran Coupe M Sport Rear can use either 275/30R20 or 275/35R19 depending on the rear wheel package. Rear tire selection should follow the exact rim diameter already on the car so the staggered setup stays properly matched front to rear.
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 2017 BMW 640i Gran Coupe Tires for Sale
Available 2017 BMW 640i Gran Coupe tires focus on blackwall radial performance choices from BFGoodrich and Nitto. Depending on size, the product grid compares g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and Nitto NT555 G2 options across the 18-, 19-, and 20-inch fitments.
Owners usually need to sort out wheel diameter, front-versus-rear stagger, and the exact tire size before comparing brands or tire series on a 2017 BMW 640i Gran Coupe. The questions below focus on fitment, product selection, and practical checks before road use.
Tire Size & Fitment
What tire size fits a 2017 BMW 640i Gran Coupe?
The 2017 BMW 640i Gran Coupe uses several radial tire sizes rather than one universal fitment. Sizes include 245/45R18, 245/40R19, 275/35R19, 245/35R20, and 275/30R20. Some cars use a single size, while others use staggered front-and-rear combinations with different widths on each axle.
The first thing to confirm is the wheel package already on the car. An 18-inch Base setup is different from a 19-inch or 20-inch staggered arrangement, and front and rear sizes are not interchangeable on staggered cars. Matching the replacement tire to the wheel diameter and axle position is more important here than simply knowing the model name.
What size rim does a 2017 BMW 640i Gran Coupe use?
The 2017 BMW 640i Gran Coupe appears with 18-inch, 19-inch, and 20-inch rim diameters, depending on configuration. The 245/45R18 tire 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 checked before looking at tread design or brand. Two tires may have similar overall proportions, but an 18-inch tire cannot be mounted on a 19-inch or 20-inch wheel. On staggered setups, confirming both front and rear wheel diameters matters, since the car may use different tire widths while keeping the same rim diameter at both ends.
Why does the 2017 BMW 640i Gran Coupe have more than one tire size?
This model has more than one tire size because the 2017 BMW 640i Gran Coupe was fitted with different wheel packages, including both non-staggered and staggered setups. The Base configuration uses 245/45R18, while 19-inch and 20-inch arrangements use narrower front tires and wider rear tires to suit the wheel package.
That means the right replacement tire depends on more than the badge on the trunk. Looking at the actual tire sidewall, checking wheel diameter, and noting whether the car has separate front and rear sizes will keep the selection accurate. This is especially important when replacing only two tires, since a staggered car needs the correct axle-specific size.
Choosing the Right Tire
What should I consider when choosing a tire for a 2017 BMW 640i Gran Coupe?
Start with the exact size already fitted to the car, then confirm whether the 2017 BMW 640i Gran Coupe is using an 18-inch square setup or a 19-inch or 20-inch staggered arrangement. All listed choices are radial blackwall tires, but they vary by brand, tire series, rim-width specification, load figures where stated, and product weight.
Once the size is settled, the decision becomes one of intended use and product character rather than basic fitment. Some owners will want an all-season style option, while others may prefer a more performance-focused series. Comparing the tire’s approved rim-width range against the actual wheel is also worthwhile, especially on the wider rear applications.
What brands offer tires for the 2017 BMW 640i Gran Coupe?
BFGoodrich and Nitto both offer tires for the 2017 BMW 640i Gran Coupe in the covered sizes. Depending on the exact fitment, available series include BFGoodrich g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and Nitto NT555 G2.
Brand choice should follow size and setup, not the other way around. Some sizes have a broader selection than others, and the 275/30R20 rear size is much narrower in available options than the 18-inch and 19-inch sizes. It helps to confirm the wheel package first, then compare which brand and series are actually offered in the correct front or rear size.
What tire series are available for the 2017 BMW 640i Gran Coupe?
The 2017 BMW 640i Gran Coupe is covered by several tire series, including BFGoodrich g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and Nitto NT555 G2. Availability depends on the exact size, so the 18-inch, 19-inch, and 20-inch fitments do not all have the same range of series choices.
That variety gives the owner room to compare product character within the correct fitment rather than hunting for a different size. A square 245/45R18 setup may offer more series choice than a rear-only 275/30R20 application. Once the proper size is confirmed, looking at sidewall presentation, rim-width compatibility, and any stated load figures can narrow the decision further.
Restoration & Appearance
Which tire should I choose for a period-style 2017 BMW 640i Gran Coupe?
A period-style approach on a 2017 BMW 640i Gran Coupe usually means keeping the wheel diameter and front-to-rear sizing the car already uses. That could mean 245/45R18 on a square setup, 245/40R19 with 275/35R19 on a 19-inch staggered setup, or 245/35R20 with 275/30R20 on a 20-inch staggered package.
Because this is a modern grand touring BMW rather than a vintage restoration case, appearance is tied more to preserving the original wheel-and-tire proportion than to whitewalls or period tread styling. Staying with the existing size family keeps the car’s visual balance intact. A switch in wheel diameter or sidewall height changes the look much more quickly than changing tire brand.
Does correct tire fitment matter for a 2017 BMW 640i Gran Coupe restoration or preservation project?
Correct tire fitment matters on a 2017 BMW 640i Gran Coupe because the car’s stance and overall presentation depend heavily on wheel diameter, sidewall profile, and staggered versus non-staggered layout. Using the proper 18-, 19-, or 20-inch size keeps the visual proportions close to the setup intended for that configuration.
Preservation-minded owners should pay close attention to whether the car has matching front and rear sizes or a wider rear tire package. That detail affects both appearance and replacement strategy. Even when the goal is mainly cosmetic, checking the current wheel setup before buying tires helps avoid an unintended mismatch in profile, width, or front-to-rear balance.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2017 BMW 640i Gran Coupe?
Yes, modifications can affect tire fitment on a 2017 BMW 640i Gran Coupe. Aftermarket wheels, changes in wheel width or offset, suspension lowering, and body or fender alterations can all change how a 245/45R18, 245/40R19, 275/35R19, 245/35R20, or 275/30R20 tire sits on the car.
A modified car should be checked by actual wheel size and available clearance instead of relying only on model-year fitment. Front steering clearance, rear fender room, and the relationship between tire width and wheel width become more important once the original setup changes. Looking at the tire currently on the car is often the quickest way to avoid ordering the wrong size.
What should I inspect before driving a 2017 BMW 640i Gran Coupe on new tires?
Before driving a 2017 BMW 640i Gran Coupe on new tires, inspect the wheel diameter, verify that the correct size was mounted at each axle position, and check inflation pressure. It is also smart to look for sidewall damage, shipping scuffs, bead seating issues, and any obvious interference around suspension parts or inner fender areas.
A staggered setup deserves extra attention because the front and rear tires are different sizes and should be in the correct positions. After a short initial drive, recheck pressure and look again for any rubbing marks or uneven clearance. That quick follow-up is especially useful on 19-inch and 20-inch low-profile fitments where small setup issues become noticeable faster.
How often should tires on a 2017 BMW 640i Gran Coupe be inspected?
Tires on a 2017 BMW 640i Gran Coupe should be inspected regularly, especially if the car is driven seasonally or spends time parked. Look at tread wear, pressure, cuts, bulges, cracking, and any signs of slow air loss. Low-profile 19-inch and 20-inch tires are also worth checking for impact damage after potholes or rough pavement.
A brief visual check before longer drives can catch problems early, and a more thorough inspection at routine service intervals is a good habit. On a staggered setup, keep an eye on front and rear wear separately since the tires are different sizes and may age differently. Long storage periods also make pressure loss and sidewall condition worth watching more closely.
