The 2018 BMW 750i xDrive sits at the luxury-performance end of the modern 7 Series, blending long-wheelbase comfort, high-speed composure, and all-wheel-drive traction in a full-size sedan that asks a lot from its tires. Tire selection on this model starts with identifying the exact wheel setup, because fitment spans 18-, 19-, and 20-inch radial sizes, including staggered front and rear combinations. Available choices range from blackwall performance radials to Pro-Trac Street Pro III options with RWL or redline styling. The key is matching the correct size to the car’s specific configuration while balancing appearance, road manners, and wheel compatibility.
Which Tire Size Is Right for The 2018 BMW 750i xDrive
The 2018 BMW 750i xDrive uses five primary tire sizes, and the right one depends on the exact wheel setup and whether the car is being matched as a complete square fitment or as part of a staggered front-and-rear arrangement. Because this model uses 18-, 19-, and 20-inch radial sizes, confirming the actual rim diameter and whether the tire is for the front, rear, or a standard base configuration should come before comparing brands or sidewall treatments.
245/45R19 is a metric radial size in which 245 identifies nominal section width in millimeters, 45 is the aspect ratio, R marks radial construction, and 19 is the wheel diameter in inches. On the 2018 BMW 750i xDrive, this size is used with a 19-inch setup and can appear in the base fitment as well as the front position of a staggered arrangement. Available options are centered on blackwall performance tires from BFGoodrich and Nitto across g-Force and NT555 G2 lines. It is the size to evaluate when the car has 19-inch front fitment and the goal is to stay within that wheel package.
245/50R18 is a metric radial size with a 245-millimeter nominal section width, a 50-series profile, radial construction, and an 18-inch rim diameter. For the 2018 BMW 750i xDrive, this size belongs to the 18-inch base configuration rather than the staggered front-and-rear combinations used with larger wheels. Product choices in this size focus on Pro-Trac Street Pro III tires, with RWL and redline sidewall treatments offering two distinct visual directions. This is the size to confirm when the car retains its 18-inch setup and appearance matters as much as basic fitment.
245/40R20 is a metric radial size where 245 is the nominal width in millimeters, 40 is the aspect ratio, R indicates radial construction, and 20 is the wheel diameter. On the 2018 BMW 750i xDrive, this size serves the front position in the 20-inch staggered arrangement, pairing a lower-profile sidewall with a larger wheel. Choices include blackwall performance offerings from BFGoodrich and Nitto, plus Pro-Trac Street Pro III versions in RWL and redline. It deserves careful attention when matching front tires on a 20-inch package, especially if appearance and handling character both matter.
275/35R20 is a wider metric radial size, with 275 indicating nominal section width in millimeters, 35 showing the aspect ratio, radial construction in the R, and a 20-inch rim requirement. For the 2018 BMW 750i xDrive, this size is used at the rear in the 20-inch staggered setup, so it should be treated as a position-specific fitment rather than a universal all-around size. Available products include blackwall performance radials from BFGoodrich and Nitto, along with Pro-Trac Street Pro III options in RWL and redline. It is the size to check when the car uses the larger staggered rear wheel package.
275/40R19 is a metric radial size with a 275-millimeter nominal width, a 40-series profile, radial construction, and a 19-inch wheel diameter. On the 2018 BMW 750i xDrive, this size is the rear component of the 19-inch staggered arrangement, making it distinct from the narrower 245/45R19 front tire. Product options lean toward blackwall performance tires, including BFGoodrich g-Force series choices and the Nitto NT555 G2. This size matters most when replacing rear tires on a 19-inch staggered setup and keeping the front-to-rear sizing relationship intact.
Sub-model fitment on the 2018 BMW 750i xDrive is tied more to wheel position and wheel package than to trim variation alone. Checking whether the car is in its base configuration or using front and rear staggered sizes is the key first step before selecting tires.
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2018 BMW 750i xDrive Base
The 2018 BMW 750i xDrive Base uses a non-staggered fitment path built around either an 18-inch or 19-inch radial size. Tire selection here starts with confirming the actual wheel diameter on the car, then choosing among the available series and sidewall styles within that correct size.
The 2018 BMW 750i xDrive Base Front identifies the front axle sizes used with staggered setups, including 19-inch and 20-inch radial fitments. That makes front tire replacement a wheel-position decision first, especially when the goal is to preserve proper matching with the rear size.
The 2018 BMW 750i xDrive Base Rear uses the wider rear sizes associated with the staggered 19-inch and 20-inch wheel packages. Rear tire choice should stay tied to the existing wheel diameter and the front-to-rear sizing relationship rather than treating the rear fitment as interchangeable with the front.
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 2018 BMW 750i xDrive Tires for Sale
Available tires for the 2018 BMW 750i xDrive span BFGoodrich, Nitto, and Pro-Trac, with choices varying by wheel diameter, tire series, and sidewall style. Depending on size, shoppers can compare blackwall performance radials or Pro-Trac Street Pro III options with RWL or redline styling.
Common questions for the 2018 BMW 750i xDrive center on identifying the correct wheel package, understanding staggered front and rear sizes, and comparing available radial tire styles. Buyers also tend to ask about sidewall appearance, product differences, and what to inspect before road use.
Tire Size & Fitment
What tire size fits a 2018 BMW 750i xDrive?
The 2018 BMW 750i xDrive uses several radial tire sizes: 245/50R18, 245/45R19, 245/40R20, 275/40R19, and 275/35R20. The fitment is configuration-specific, with 18-inch and 19-inch square options on the base setup and staggered front and rear sizing on 19-inch and 20-inch wheel packages.
That means the first job is identifying the actual wheel diameter and whether the car uses the same size at all four corners or a staggered setup. A front 245 size and a rear 275 size serve different positions, so replacing tires by year and model alone is not enough without checking the car’s current wheels.
What size rim does a 2018 BMW 750i xDrive use?
The 2018 BMW 750i xDrive uses 18-inch, 19-inch, and 20-inch rim diameters depending on configuration. The 245/50R18 tire mounts on an 18-inch wheel, the 245/45R19 and 275/40R19 sizes use 19-inch wheels, and the 245/40R20 and 275/35R20 sizes require 20-inch wheels.
Rim diameter is the most important fitment checkpoint on this car because the overall tire lineup spans three different wheel sizes. A tire can have a similar overall height to another fitment and still be unusable if the wheel diameter is wrong, so checking the size molded on the current tire or wheel is essential.
Why does the 2018 BMW 750i xDrive have more than one tire size?
This model has more than one tire size because it was fitted with different wheel packages, including both square and staggered arrangements. A square setup uses the same size at each corner within a given wheel diameter, while a staggered setup uses a narrower front tire and a wider rear tire.
That distinction affects more than appearance. It determines which tires belong on the front versus the rear, what rim diameter is required, and whether rotation options are limited by size differences. Identifying the current wheel package before ordering replacements helps avoid mixing front and rear fitments that were designed for different positions.
Choosing the Right Tire
What should I consider when choosing a tire for a 2018 BMW 750i xDrive?
Start with the exact size and wheel position, because the 2018 BMW 750i xDrive can use square or staggered radial fitments across 18-, 19-, and 20-inch wheels. After that, compare construction details within the correct size, including tire series, sidewall treatment, rim-width specification where stated, and load-related information when available.
The right choice depends on how the car is used and how you want it to look. A blackwall performance tire gives a different presentation from an RWL or redline option, and front-versus-rear fitment matters on staggered packages. Matching the existing wheel setup is the priority before comparing styling or product features.
What sidewall styles are available for 2018 BMW 750i xDrive tires?
Sidewall styles for the 2018 BMW 750i xDrive include blackwall, RWL, and redline, depending on tire size. Blackwall choices are common in the BFGoodrich and Nitto performance-oriented offerings, while Pro-Trac Street Pro III adds RWL and redline options in select 18-inch and 20-inch sizes.
That gives the car noticeably different visual directions without changing the basic fitment category. A blackwall keeps the appearance modern and understated, while RWL or redline adds a more custom or enthusiast-focused look. The main thing to verify is that the preferred sidewall treatment is offered in the exact size and wheel position required.
What brands offer tires for the 2018 BMW 750i xDrive?
Tires for the 2018 BMW 750i xDrive are available from BFGoodrich, Nitto, and Pro-Trac. Depending on size, the lineup includes BFGoodrich g-Force series products, Nitto NT555 G2 fitments, and Pro-Trac Street Pro III tires with appearance-focused sidewall options.
Brand choice should come after confirming size, wheel diameter, and axle position. Some sizes have a broader mix of brands and series than others, while certain sidewall styles are limited to Pro-Trac offerings. Comparing the correct-size options side by side makes it easier to choose the tire that matches the car’s setup and the look you want.
Restoration & Appearance
Which tire should I choose for a period-style 2018 BMW 750i xDrive?
A period-style approach on a 2018 BMW 750i xDrive still starts with the correct modern radial size for the car’s actual wheel package. From there, the appearance decision is usually between contemporary blackwall performance tires and more distinctive Pro-Trac Street Pro III options in sizes where RWL or redline sidewalls are offered.
Because this is a modern luxury-performance sedan, period-style usually means staying visually appropriate to the era rather than recreating a vintage tire look. The cleanest result often comes from matching the intended appearance to the wheel design already on the car, while keeping front and rear sizing relationships intact on staggered setups.
How does tire construction affect the appearance of a restored 2018 BMW 750i xDrive?
On the 2018 BMW 750i xDrive, construction does not create a bias-ply-versus-radial appearance decision because the primary fitments are radial across the board. The visual differences come instead from profile, wheel diameter, and sidewall treatment, especially when comparing blackwall tires with RWL or redline versions in selected sizes.
That makes the appearance choice more about presentation than about changing tire type. A 20-inch staggered setup gives the car a different visual stance than an 18-inch square setup, and sidewall style can push the result toward a cleaner or more expressive look. Keeping the correct size for each position preserves the intended proportions.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2018 BMW 750i xDrive?
Yes, modifications can affect tire fitment on a 2018 BMW 750i xDrive. Changes such as aftermarket wheels, altered wheel width, different offset, lowering, or suspension work can change the space available for a tire even when the size looks close to one of the standard fitments.
That is especially important on a car with multiple factory-style wheel diameters and staggered options. A front size should not be treated as a rear substitute, and a 20-inch setup should not be assumed to mirror an 18- or 19-inch arrangement. Checking clearance at steering lock and through suspension travel helps prevent rubbing problems.
What should I inspect before driving a 2018 BMW 750i xDrive on new tires?
Before driving on new tires, inspect the wheel diameter, confirm that the front and rear sizes are in the correct positions, and check that inflation is set properly for the tire being installed. It also helps to look over the wheels for damage and confirm that the tires seat and balance correctly.
A careful walkaround after installation can catch preventable issues early. Look for uneven spacing to the fender, signs of contact near suspension components, and any vibration once the car is on the road. On a staggered BMW setup, making sure each axle received the proper size is one of the most important final checks.
How often should tires on a 2018 BMW 750i xDrive be inspected?
Tires on a 2018 BMW 750i xDrive should be inspected regularly, especially before longer drives and any time the car has been sitting for a while. Check tread wear, sidewall condition, air pressure, and any signs of cuts, bulges, or irregular wear that could point to alignment or suspension concerns.
Frequent inspection matters because this model may use wide rear tires, low-profile fitments, and staggered combinations that can mask developing wear differences from one axle to the other. Keeping an eye on condition at both ends of the car helps preserve handling balance and makes it easier to catch issues before they become expensive.
