The 2017 BMW 640i xDrive Gran Coupe blends grand touring comfort with the low, swept profile of a four-door coupe, making tire fitment a meaningful part of both its look and its road manners. On this model, the main question is not old-style bias-ply versus radial construction, because every fitment here is radial. Instead, the decision centers on identifying the exact wheel setup: 18-inch, 19-inch, or staggered 19- and 20-inch arrangements. Tire choices then narrow by front and rear sizing, tire series, and brand, with blackwall performance-oriented options from BFGoodrich and Nitto. Checking the actual wheels on the car is the first step before comparing replacements.
Which Tire Size Is Right for The 2017 BMW 640i xDrive Gran Coupe
The 2017 BMW 640i xDrive Gran Coupe uses five primary tire sizes, and they vary by wheel diameter and by position on the car. Some setups use a single size at all four corners, while others use a staggered front-and-rear combination, so the first step is confirming whether the car has 18-inch, 19-inch, or 20-inch wheels and whether the front and rear sizes match.
In 245/40R19, the 245 is the nominal section width in millimeters, 40 is the aspect ratio, R identifies radial construction, and 19 is the wheel diameter in inches. This size serves the 2017 BMW 640i xDrive Gran Coupe in a modern radial format that suits the car's contemporary grand touring and performance character. Available choices include BFGoodrich products in the g-Force Sport Comp 2, g-Force Comp 2 AS, and g-Force Phenom T/A series, all in blackwall styling. It is a useful size to evaluate when the car carries a 19-inch non-staggered setup or a matching front fitment.
The code 245/45R18 identifies a tire that is 245 millimeters wide, uses a 45-series profile, has radial construction, and mounts on an 18-inch rim. On the 2017 BMW 640i xDrive Gran Coupe, this is one of the square-fitment sizes, meaning it can represent a four-corner setup rather than a staggered front-and-rear combination. Product choices include blackwall options from BFGoodrich and Nitto, with series such as g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, and NT555 G2. This size is worth selecting when the car is equipped with 18-inch wheels and the owner wants to stay with that wheel diameter.
A 245/35R20 tire uses a 245-millimeter nominal width, a lower 35-series profile, radial construction, and a 20-inch wheel diameter. On this BMW, that size appears as a front fitment in a staggered arrangement, paired with a wider rear tire rather than used at all four corners. BFGoodrich and Nitto offer blackwall choices in this size, including g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, and NT555 G2. It should be evaluated as part of a matched front-and-rear setup, with attention to keeping the correct position on the car.
The size 275/30R20 denotes a wider 275-millimeter tire with a 30-series profile, radial construction, and a 20-inch rim diameter. For the 2017 BMW 640i xDrive Gran Coupe, this is a rear-position size used with the 20-inch staggered arrangement, not a universal fitment for every wheel setup. In the available selections here, this size appears as a blackwall Nitto NT555 G2, reflecting its role as a specialized rear fitment rather than a broad multi-series category. It should be chosen only after confirming that the car is running the corresponding 20-inch front-and-rear staggered package.
In 275/35R19, the 275 is the nominal section width in millimeters, 35 is the aspect ratio, R means radial, and 19 is the wheel diameter in inches. On the 2017 BMW 640i xDrive Gran Coupe, this size functions as a rear fitment in a staggered setup, paired with a narrower front tire rather than used as a square arrangement. Available blackwall options come from BFGoodrich and Nitto across series including g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, and NT555 G2. It makes sense when the car has 19-inch staggered wheels and the rear tire size needs to remain distinct from the front.
Sub-model fitment on the 2017 BMW 640i xDrive Gran Coupe is driven by wheel position as much as trim naming. Checking whether the car is listed as Base, Base Front, or Base Rear helps separate square tire setups from staggered front-and-rear combinations before selecting replacements.
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2017 BMW 640i xDrive Gran Coupe Base
The Base configuration uses square-fitment radial sizes, so the same size can appear at all four corners depending on whether the car has 18-inch or 19-inch wheels. Tire selection here starts with confirming wheel diameter, then comparing available blackwall tire series and brand choices within the matching size.
The Base Front configuration covers the front axle in a staggered setup, using narrower front radial sizes on either 19-inch or 20-inch wheels. That means the front tire should be matched to the rear arrangement already on the car, with wheel diameter and front-to-rear pairing confirmed before replacement.
The Base Rear configuration uses the wider rear tire sizes associated with the car's staggered setups, again split between 19-inch and 20-inch wheel packages. Choosing a rear tire here means verifying the wheel diameter and keeping the rear size coordinated with the existing front fitment rather than selecting by width alone.
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 xDrive Gran Coupe Tires for Sale
Available tires for the 2017 BMW 640i xDrive Gran Coupe focus on modern radial blackwall fitments from BFGoodrich and Nitto. Depending on size, the product grid lets buyers compare g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, and NT555 G2 options across the car's 18-, 19-, and 20-inch wheel setups.
Common questions for the 2017 BMW 640i xDrive Gran Coupe usually come down to identifying the correct tire size by wheel setup, understanding staggered fitment, and comparing available radial tire choices for appearance, compatibility, and road use.
Tire Size & Fitment
What tire size fits a 2017 BMW 640i xDrive Gran Coupe?
The 2017 BMW 640i xDrive Gran Coupe uses several radial tire sizes: 245/45R18, 245/40R19, 245/35R20, 275/35R19, and 275/30R20. The exact size depends on whether the car has a square setup or a staggered front-and-rear arrangement, and on whether it is equipped with 18-inch, 19-inch, or 20-inch wheels.
That makes wheel verification the first step before choosing a replacement. A square setup uses the same size all around, while a staggered setup uses narrower front tires and wider rear tires. Looking at the tire sidewall and confirming the actual wheel diameter on the car will prevent mixing the wrong front and rear sizes.
What size rim does a 2017 BMW 640i xDrive Gran Coupe use?
The 2017 BMW 640i xDrive Gran Coupe uses 18-inch, 19-inch, and 20-inch rim diameters depending on the tire size and wheel package. The 245/45R18 size mounts on an 18-inch rim, 245/40R19 and 275/35R19 mount on 19-inch rims, and 245/35R20 plus 275/30R20 mount on 20-inch rims.
Rim diameter has to match the tire exactly, so that measurement should be confirmed before anything else. It is also helpful to verify whether the car uses the same wheel diameter front and rear or a staggered package with matching diameters but different widths. That check narrows the search quickly and avoids ordering the right width in the wrong diameter.
Why does the 2017 BMW 640i xDrive Gran Coupe have more than one tire size?
More than one tire size appears on the 2017 BMW 640i xDrive Gran Coupe because the car can be equipped with different wheel diameters and with either square or staggered fitment. The square setups use one size at all four corners, while the staggered setups split the car into narrower front and wider rear tires.
That distinction matters because a front size is not automatically suitable for the rear, even if the wheel diameter seems close. The safest way to narrow the fitment is to inspect the tires already on the car and confirm whether the front and rear sidewalls show different sizes. On a staggered setup, both axle positions need to be matched correctly.
Choosing the Right Tire
What should I consider when choosing a tire for a 2017 BMW 640i xDrive Gran Coupe?
Start with the correct size and wheel arrangement on the car. The 2017 BMW 640i xDrive Gran Coupe can use square or staggered radial fitments, so the decision begins with confirming wheel diameter, front-versus-rear sizing, and whether the existing setup uses 18-inch, 19-inch, or 20-inch wheels.
Once fitment is confirmed, compare the available tire series by how they match the car's use. Some owners prioritize a consistent blackwall performance look, while others compare rim-width ranges, load figures where shown, or brand preference between BFGoodrich and Nitto. Choosing within the right size is more important than chasing a similar-looking size from another wheel package.
What brands offer tires for the 2017 BMW 640i xDrive Gran Coupe?
Tires for the 2017 BMW 640i xDrive Gran Coupe are available here from BFGoodrich and Nitto. Brand availability depends on size, with BFGoodrich covering several of the 18-inch, 19-inch, and 20-inch fitments, while Nitto appears in multiple sizes including the 275/30R20 rear fitment.
Brand choice should still come after fitment confirmation. Once the correct size is established, comparing the available series within that size gives a clearer picture than choosing a brand first. That approach is especially important on staggered cars, where the front and rear may not have the same brand and series availability in every size.
What tire series are available for the 2017 BMW 640i xDrive Gran Coupe?
The available tire series for the 2017 BMW 640i xDrive 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. The exact series selection varies by tire size, so not every size has the same mix of options.
That matters most when the car uses staggered fitment, because the front and rear sizes may have different series availability. It is worth checking whether a matched appearance and similar product family are possible across both axles before making a final choice. On square setups, comparing series is simpler because the same size is used at all four corners.
Restoration & Appearance
How does tire construction affect the appearance of a restored 2017 BMW 640i xDrive Gran Coupe?
On a 2017 BMW 640i xDrive Gran Coupe, construction is straightforward because the fitments here are all radial. Appearance therefore comes less from bias-ply versus radial differences and more from maintaining the proper low-profile front-and-rear proportions, the correct wheel diameter, and a consistent modern blackwall presentation.
A restoration-minded owner usually gets the cleanest result by preserving the original-style wheel and tire relationship rather than substituting a different profile just because the diameter looks close. The Gran Coupe's body lines and stance depend heavily on that balance. Matching the correct front and rear size family helps the car keep its intended visual character.
Does correct tire fitment matter for a 2017 BMW 640i xDrive Gran Coupe restoration?
Correct tire fitment matters on a 2017 BMW 640i xDrive Gran Coupe because the car's look depends on the right combination of wheel diameter, sidewall height, and, in staggered setups, the proper difference between front and rear widths. Even a small change in profile can alter the car's stance and overall presentation.
For a restoration-oriented project, the goal is usually to keep the tire size aligned with the wheel package actually fitted to the car. Checking existing wheels, verifying front and rear sizes, and avoiding casual substitutions will usually preserve a more authentic visual balance. When originality is especially important, vehicle-specific BMW references can help confirm the intended setup.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2017 BMW 640i xDrive Gran Coupe?
Yes, modifications can affect tire fitment on a 2017 BMW 640i xDrive Gran Coupe. Aftermarket wheels, changes in wheel width or offset, lowered suspension, or body alterations can all change how much clearance a 245- or 275-section tire has at the fender, suspension, and steering components.
That is especially important on staggered 19-inch and 20-inch combinations, where front and rear tires already differ in width and profile. A replacement tire may match the sidewall size but still need a closer wheel and clearance check if the car is no longer stock. Measuring the current setup before replacement helps prevent rubbing or mismatch problems.
What should I inspect before driving a 2017 BMW 640i xDrive Gran Coupe on new tires?
Before road use, inspect the wheel diameter, confirm the exact tire size at each axle, and make sure the tires are mounted in the correct front or rear position. It is also wise to check air pressure, look for any visible shipping or installation damage, and confirm that the tire clears the suspension and inner fender through full steering travel.
A second look after the first short drive is worthwhile, especially on a staggered setup. Recheck pressure, confirm there is no rubbing, and make sure the car tracks cleanly without vibration. If the BMW has aftermarket wheels or recent suspension work, a professional inspection can help catch fitment issues before longer highway use.
What should I check before a longer drive in a 2017 BMW 640i xDrive Gran Coupe?
Before a longer drive, verify that the 2017 BMW 640i xDrive Gran Coupe has the correct tire sizes installed at the correct positions, especially if it uses a staggered setup. Then inspect pressure, tread condition, sidewalls, and valve stems, and make sure there are no cuts, bulges, or signs of slow air loss.
Longer trips also make it worth checking the spare plan, alignment condition, and overall wheel security. A car that has sat for extended periods should get extra attention because low-use vehicles can age tires without adding many miles. Looking over the tires when cold and again after some driving can reveal issues that are easy to miss in storage.
