2017 BMW 640i xDrive Tires

The 2017 BMW 640i xDrive uses five primary tire sizes: 245/45R18, 245/40R19, 245/35R20, 275/35R19, and 275/30R20. All are radial sizes, and they do not all serve the same role. The 245-width sizes are used on square setups or as front sizes in staggered applications, while the 275-width sizes are rear fitments for staggered combinations.

Choosing the right one starts with identifying the wheel diameter on the car and whether it has the same size at all four corners or a front-and-rear stagger. A 19-inch front and 19-inch rear pair is different from a 20-inch front and 20-inch rear pair, so the vehicle should be checked carefully before selecting a replacement tire.

A 2017 BMW 640i xDrive can use 18-inch, 19-inch, or 20-inch rims depending on the tire and wheel package. The 245/45R18 fits an 18-inch rim, the 245/40R19 and 275/35R19 fit 19-inch rims, and the 245/35R20 and 275/30R20 fit 20-inch rims. Rim diameter is built into the tire size itself, so that number needs to match exactly.

Wheel diameter should be confirmed before comparing brands or tread lines, especially on a car that may have had wheels changed over time. Rim width matters too, since several available products are intended for specific width ranges, and staggered front and rear wheels may not use the same width even when the diameters are paired correctly.

The 2017 BMW 640i xDrive has more than one tire size because it was fitted with different wheel diameters and with both square and staggered arrangements. Square setups use the same size at all four corners, while staggered setups use a narrower front tire and a wider rear tire. That is why both 245-width and 275-width sizes appear on this application.

The practical effect is that tire selection cannot start with the model name alone. The owner should confirm the actual wheel package on the car, then determine whether the fitment is front, rear, or all-around. That matters even more on modified cars, since wheel swaps can put a different size family on the vehicle than it originally used.

Start with the exact tire size and wheel position, because the 2017 BMW 640i xDrive may use either a square setup or a staggered front-and-rear combination. All of the applicable tires are radials, but they differ by series, brand, rim-width compatibility, load-related specifications, and intended use within the same overall fitment family.

Once the correct size is confirmed, compare the product line that best suits how the car is driven and presented. Some owners may want to stay with a matching series front to rear, while others may focus on the available rim-width range or load figures where they appear. Keeping the correct axle position and wheel diameter is the first priority.

Tires for the 2017 BMW 640i xDrive are available from BFGoodrich and Nitto in the covered sizes. BFGoodrich appears across several of the 18-inch, 19-inch, and 20-inch fitments, while Nitto is also available in multiple sizes, including both front and rear staggered applications. Those brand options give buyers more than one path within the correct radial sizing.

Brand choice should come after the size and wheel position are confirmed. A rear 275/30R20 selection, for example, does not have the same product spread as a 245/40R19 or 275/35R19. Once the exact fitment is known, comparing by series, rim-width guidance, weight, and any stated load capacity is more useful than choosing by brand name alone.

Available tire series for the 2017 BMW 640i xDrive include BFGoodrich g-Force Sport Comp 2, BFGoodrich g-Force Comp 2 AS, BFGoodrich g-Force Phenom T/A, and Nitto NT555 G2, depending on size. Not every series appears in every fitment, so the front and rear staggered sizes may have a different menu of choices than the square sizes.

That means the series comparison should be done only after the exact tire size is settled. A buyer replacing all four tires on a square 18-inch or 19-inch setup may have broader matching options than someone replacing only the rear tires on a staggered 20-inch arrangement. Checking the series within the correct size prevents misleading cross-size comparisons.

A period-appropriate look on a 2017 BMW 640i xDrive starts with keeping the correct metric radial size and the proper wheel diameter for the car’s setup. Since this application uses modern radial sizes rather than vintage bias-ply fitments, the visual baseline is a contemporary low-profile tire, either in a square configuration or a staggered front-and-rear pairing.

Appearance usually depends more on preserving the right proportions than on chasing an unusual sidewall treatment. Staying with the correct 18-inch, 19-inch, or 20-inch package helps maintain the car’s intended stance, while mixing incorrect front and rear sizes can change that look quickly. Product line choice then becomes a secondary decision after fitment is settled.

Correct tire fitment matters on a 2017 BMW 640i xDrive because this car’s look depends heavily on wheel diameter, sidewall profile, and whether it uses a square or staggered arrangement. A 245/45R18 setup presents differently than 245/40R19 and 275/35R19, and a 20-inch staggered package changes the visual balance again through shorter sidewalls and wider rear tires.

For a preservation-minded owner, matching the actual wheel package on the vehicle is usually more important than focusing on brand alone. If originality is a serious concern, the installed wheels and prior service history should be reviewed before replacement. That approach keeps the tire choice aligned with the car’s existing configuration and avoids an unintended change in stance.

Yes, modifications can affect tire fitment on a 2017 BMW 640i xDrive. Wheel changes, altered offsets, suspension lowering, and aftermarket body components can all change how a 245-width or 275-width tire sits in the wheel opening. Even when the rim diameter remains 18, 19, or 20 inches, the usable clearance around the tire may no longer match the original setup.

That is why the actual vehicle should be checked rather than relying only on the model name. Front steering clearance, rear fender space, and the relationship between the tire and wheel width all matter. On a staggered car, modifications at one axle can also upset the intended front-to-rear pairing, so both ends of the vehicle should be verified together.

Before driving a 2017 BMW 640i xDrive on new tires, inspect the wheel size, the mounted front and rear tire sizes, inflation pressure, and general tire condition after installation. The tires should match the intended square or staggered arrangement, and the wheels should be free of visible damage that could affect seating or air retention.

A short check for clearance is also worthwhile, especially if the car has 19-inch or 20-inch wheels with low-profile tires. Turn the steering from lock to lock, look for any rubbing signs, and confirm that the rear tires have room under load. Rechecking pressure after the first drives helps catch slow leaks or installation-related issues early.

Before a longer drive, a 2017 BMW 640i xDrive should have its tire pressures checked cold, along with tread condition, sidewall condition, and any signs of cuts, bulges, or uneven wear. On staggered setups, confirm that the front and rear tires are still the correct paired sizes and that no mismatched replacement has been installed at one corner.

Longer trips are also a good time to inspect wheel condition and look for any rubbing that may not be obvious in normal local driving. Cars with aftermarket wheels or suspension changes deserve extra attention here. A careful walkaround and pressure check can prevent fitment problems, vibration complaints, and avoidable road issues once the trip begins.