The 2017 BMW 550i GT xDrive blends the tall-roof practicality of the 5 Series Gran Turismo with BMW’s twin-turbo V8 power and all-wheel-drive touring character. It sits in an unusual space between luxury sedan, fastback, and long-distance grand tourer, which makes tire choice especially important to how the car looks and drives. This model uses radial tires only, but fitment changes across 18-, 19-, and 20-inch wheel packages, including staggered front and rear setups on some versions. Available choices range from blackwall performance radials to Pro-Trac Street Pro III options with RWL or redline styling. The key is confirming the exact sub-model and wheel setup before choosing by series, sidewall appearance, or size.
Which Tire Size Is Right for The 2017 BMW 550i GT xDrive
The 2017 BMW 550i GT xDrive uses five primary tire sizes, and the correct one depends on the exact sub-model and wheel package. Some versions use a square setup, while others use staggered front and rear sizes, and the vehicle appears with 18-, 19-, and 20-inch rims. Before choosing a tire, confirm both the sub-model and whether the car is running matching or staggered wheel diameters and widths.
245/50R18 is a metric radial size in which 245 is the nominal section width in millimeters, 50 is the aspect ratio, R identifies radial construction, and 18 is the rim diameter in inches. On the 2017 BMW 550i GT xDrive, this size is tied to an 18-inch wheel setup and suits buyers keeping the car in its standard radial format. Product choice in this size centers on Pro-Trac Street Pro III offerings with either RWL or redline sidewall styling. It is the right size to evaluate when the car is equipped with the Base wheel package and appearance is part of the decision.
245/45R19 is a metric radial size with a 245-millimeter nominal section width, a 45-series profile, and a 19-inch rim diameter. This size appears on certain 19-inch 2017 BMW 550i GT xDrive configurations and also shows up as a front fitment reference within some M Sport applications, so wheel setup matters before selection. Available products in this size come from BFGoodrich and Nitto, primarily in blackwall performance-oriented series such as g-Force Comp 2 AS, g-Force Phenom T/A, and NT555 G2. It is a useful size to focus on when maintaining a 19-inch square setup or confirming front tire fitment on a staggered package.
245/40R20 is a metric radial size that uses a 245-millimeter nominal section width, a lower 40-series profile, and a 20-inch rim diameter. On the 2017 BMW 550i GT xDrive, it serves as a front-size fitment on 20-inch applications, making it part of a staggered package rather than a universal all-around size. Buyers can choose among blackwall performance radials from BFGoodrich and Nitto or Pro-Trac Street Pro III tires with RWL or redline sidewalls. This size deserves close attention when the car has 20-inch front wheels and the goal is to balance modern performance with a preferred sidewall look.
275/35R20 is a metric radial size where 275 denotes the nominal section width in millimeters, 35 is the aspect ratio, and 20 is the rim diameter in inches. On the 2017 BMW 550i GT xDrive, this wider size functions as a rear fitment on 20-inch staggered setups, so it should be matched to the correct front size rather than treated as a square-fit option. Product selection includes blackwall BFGoodrich and Nitto tires as well as Pro-Trac Street Pro III versions with RWL or redline styling. This is the size to evaluate when confirming a 20-inch rear wheel package and choosing between a performance-blackwall look or a more distinctive sidewall treatment.
275/40R19 is a metric radial size with a 275-millimeter nominal section width, a 40-series profile, and a 19-inch rim diameter. Within the 2017 BMW 550i GT xDrive range, it is used as a rear fitment on certain 19-inch staggered arrangements, which makes wheel position just as important as size. Available tires are blackwall radials from BFGoodrich and Nitto across series such as g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, and NT555 G2. It is the right place to start when the car carries a wider 19-inch rear setup and the buyer wants to compare series, load-related specs, and rim-width suitability.
Tire fitment on the 2017 BMW 550i GT xDrive is not the same across every sub-model, and some versions split front and rear sizes. Checking the exact sub-model matters because the car appears with 18-, 19-, and 20-inch wheels, plus both square and staggered setups.
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2017 BMW 550i GT xDrive Base
The Base version uses a single 245/50R18 radial fitment on an 18-inch wheel setup. Tire selection here is more about choosing the desired sidewall presentation, such as RWL or redline, than sorting through front and rear staggered sizing.
The Luxury Line uses 245/45R19 radial tires in its standard 19-inch configuration. Choosing a tire starts with staying in that size, then comparing blackwall performance-oriented series and wheel-compatibility details where they are given.
The Luxury Line Front position uses 245/40R20, which places it in a 20-inch staggered setup rather than a square arrangement. Tire choice should stay focused on front-axle sizing and then move to brand, sidewall style, and product-series differences.
The Luxury Line Rear position uses 275/35R20, a wider rear radial paired with the 20-inch front fitment. Selecting the rear tire means confirming the staggered setup first and then comparing available blackwall, RWL, or redline presentations.
The M Sport uses 245/45R19 in one of its covered configurations, keeping the car on a 19-inch radial fitment. The main decision is choosing among the available blackwall performance series while confirming that the car is not running one of the staggered front and rear combinations.
The M Sport Front appears with either 245/40R20 or 245/45R19, so wheel diameter must be confirmed before any tire is chosen. Once that is settled, the buyer can compare series and sidewall options within the correct front size.
The M Sport Rear uses either 275/35R20 or 275/40R19 depending on the wheel package, making rear-wheel diameter the first fitment check. After that, selection comes down to matching the proper rear size and comparing the available blackwall performance options.
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 550i GT xDrive Tires for Sale
Available tires for the 2017 BMW 550i GT xDrive span Pro-Trac, BFGoodrich, and Nitto, with choices that vary by size, tire series, and sidewall treatment. Depending on the wheel package, the product grid may include blackwall performance radials as well as Pro-Trac Street Pro III options in RWL or redline.
These FAQs focus on the exact tire sizes used on the 2017 BMW 550i GT xDrive, including staggered fitment, rim diameter, sidewall choices, and what to inspect before putting the car back on the road.
Tire Size & Fitment
What tire size fits a 2017 BMW 550i GT xDrive?
The 2017 BMW 550i GT xDrive uses several radial tire sizes: 245/50R18, 245/45R19, 245/40R20, 275/35R20, and 275/40R19. The correct size depends on the exact sub-model and wheel setup, because this car appears in both square and staggered configurations.
Base models use 245/50R18, while other versions move to 19-inch or 20-inch fitments. Some Luxury Line and M Sport applications split front and rear sizes, so the first step is confirming whether the car has matching wheels at all four corners or wider rear tires on a staggered setup.
What size rim does a 2017 BMW 550i GT xDrive use?
The 2017 BMW 550i GT xDrive appears with 18-inch, 19-inch, and 20-inch rim diameters. Tire fitment follows those wheel sizes directly, with 245/50R18 on 18-inch wheels, 245/45R19 and 275/40R19 on 19-inch wheels, and 245/40R20 plus 275/35R20 on 20-inch wheels.
Wheel diameter is one of the most important checks on this model because more than one rim size is used across the range. Looking at the existing tire sidewall or measuring the wheel before ordering helps prevent mixing a 19-inch or 20-inch tire into the wrong package.
Why does the 2017 BMW 550i GT xDrive have more than one tire size?
This model has more than one tire size because BMW offered different wheel packages and some versions use staggered front and rear fitment. That means one configuration may carry the same size on all four corners, while another uses a narrower front tire and a wider rear tire.
The practical takeaway is that the car should not be treated as a one-size application. Identifying the exact sub-model, checking the current wheel diameter, and noting whether the front and rear tires match are all important before choosing between 18-, 19-, or 20-inch replacements.
Choosing the Right Tire
What should I consider when choosing a tire for a 2017 BMW 550i GT xDrive?
Start with the correct size for the exact sub-model and wheel package, because the 2017 BMW 550i GT xDrive uses five different radial sizes. After size is confirmed, compare the available construction details, tire series, rim-width specifications where shown, load-related specs, and whether the car uses a square or staggered setup.
Appearance also matters more than it does on many modern vehicles, since some sizes include blackwall, RWL, and redline choices. A buyer keeping a factory-style visual balance may lean one way, while someone focused on a sportier custom look may choose a different sidewall treatment in the same size.
What sidewall styles are available for 2017 BMW 550i GT xDrive tires?
Sidewall style depends on tire size. Blackwall choices appear in the BFGoodrich and Nitto offerings for the 19-inch and 20-inch fitments, while Pro-Trac Street Pro III is available with RWL and redline sidewalls in 245/50R18, 245/40R20, and 275/35R20.
That means sidewall appearance is part of the selection process, but only after the correct size is confirmed. A square 18-inch Base setup offers a different visual menu than a staggered 20-inch package, so matching the car’s wheel arrangement comes before choosing the sidewall look.
What brands offer tires for the 2017 BMW 550i GT xDrive?
Tires for the 2017 BMW 550i GT xDrive are available from Pro-Trac, BFGoodrich, and Nitto. Brand availability varies by size, with BFGoodrich and Nitto concentrated in the 19-inch and 20-inch blackwall performance sizes and Pro-Trac appearing in selected sizes with RWL or redline styling.
Brand choice should be considered alongside size, series, and wheel setup rather than as a separate shortcut. A 19-inch M Sport arrangement and a 20-inch staggered package do not draw from exactly the same product mix, so the useful comparison is within the correct fitment first.
Restoration & Appearance
Which tire should I choose for a period-style 2017 BMW 550i GT xDrive?
A period-style choice for a 2017 BMW 550i GT xDrive starts with the exact tire size that matches the car’s wheel package. Since this model is firmly modern and radial-only, the look comes more from sidewall treatment and overall presentation than from choosing between vintage construction types.
Pro-Trac Street Pro III options with RWL or redline sidewalls create a more distinctive appearance in the sizes where they are offered, while blackwall BFGoodrich and Nitto tires maintain a more contemporary performance look. The best approach is to match the visual style to the car without stepping outside its correct fitment.
How does tire construction affect the appearance of a restored 2017 BMW 550i GT xDrive?
On the 2017 BMW 550i GT xDrive, construction is straightforward because the primary fitments are all radial. That means the visual differences come less from bias-ply versus radial character and more from profile, wheel diameter, and whether the tire carries a blackwall, RWL, or redline sidewall.
A 20-inch staggered setup naturally gives the car a different stance than an 18-inch square arrangement, even when both remain within correct fitment. For an appearance-focused project, the important step is preserving the proper size relationship front to rear and then selecting the sidewall style that suits the build.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2017 BMW 550i GT xDrive?
Yes. Modifications such as aftermarket wheels, suspension changes, altered ride height, or body changes can affect tire fitment on a 2017 BMW 550i GT xDrive. That matters even more on this model because some versions already use staggered front and rear sizing, leaving less room for guesswork.
A changed wheel offset or width can alter inner and outer clearance even when the tire size itself looks correct. Any modified car should have the actual wheel diameter, wheel width, and front-to-rear setup checked before selecting 19-inch or 20-inch replacements.
What should I inspect before driving a 2017 BMW 550i GT xDrive on new tires?
Before driving on new tires, inspect the wheels for damage, confirm the tire sizes match the car’s actual wheel package, and make sure the front and rear positions are correct on staggered setups. Tire pressure, valve condition, and proper mounting direction also deserve attention before road use.
A quick clearance check is worthwhile as well, especially on 20-inch applications or any car with non-stock wheels. Turning the steering from lock to lock, checking rear clearance under load, and confirming there is no rubbing at the fender or suspension can prevent early problems.
What should I check before a longer drive in a 2017 BMW 550i GT xDrive?
Before a longer drive, check tire pressure, tread condition, sidewall condition, and any signs of bulges, cuts, or uneven wear. On a 2017 BMW 550i GT xDrive, it is also important to confirm that a staggered setup still has the correct front and rear sizes in their proper positions.
Cars that spend a lot of time parked can develop issues that are not obvious at a glance, including flat spotting, slow air loss, or age-related cracking. A careful inspection of all four tires and a review of wheel condition can make a long trip much less eventful.
