The 2019 BMW M850i xDrive arrived as a grand touring flagship with the long, low stance and high-speed composure expected from BMW’s 8 Series revival. For tire selection, that matters because this car uses a staggered radial setup, with different front and rear sizes and either 19-inch or 20-inch rim fitments depending on configuration. Front sizes are 245/40R19 or 245/35R20, while the rear uses 275/35R19 or 275/30R20. Available choices center on modern performance-oriented radial tires, mostly in blackwall form, across BFGoodrich and Nitto series. The key is matching both axle position and wheel diameter before comparing tire models.
Which Tire Size Is Right for The 2019 BMW M850i xDrive
The 2019 BMW M850i xDrive uses four primary tire sizes across a staggered front-and-rear setup, and the first step is confirming whether the car is on 19-inch or 20-inch wheels. Front fitment and rear fitment use different widths and aspect ratios, so selecting the right tire means identifying both axle position and the exact wheel diameter before comparing brands or tire series.
Fit(s): Convertible Front, Coupe Front, and First Edition Front
Construction: Radial|Rim: 20 in
In 245/35R20, the 245 identifies nominal section width in millimeters, the 35 is the aspect ratio, the R indicates radial construction, and the 20 is the rim diameter in inches. On the 2019 BMW M850i xDrive, this is a front tire size used with 20-inch wheels in a low-profile modern radial format. Available choices include BFGoodrich and Nitto products in blackwall form, with series such as g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, and NT555 G2. This size suits buyers confirming a 20-inch front-wheel setup and comparing performance-oriented tire character within that fitment.
In 245/40R19, the 245 is the nominal section width in millimeters, the 40 is the aspect ratio, the R marks radial construction, and the 19 is the wheel diameter in inches. For the 2019 BMW M850i xDrive, this size serves the front axle on 19-inch wheel applications and keeps the staggered fitment relationship with the wider rear tire. Product choices in this size include BFGoodrich blackwall tires across multiple g-Force series, giving buyers a few different performance-focused approaches within the same front fitment. It is the right size to evaluate when the car has 19-inch front wheels rather than 20s.
Fit(s): Convertible Rear, Coupe Rear, and First Edition Rear
Construction: Radial|Rim: 20 in
In 275/30R20, the 275 refers to nominal section width in millimeters, the 30 is the aspect ratio, the R denotes radial construction, and the 20 is the rim diameter in inches. On the 2019 BMW M850i xDrive, this is a rear tire size for 20-inch applications, paired with a narrower front size as part of the car’s staggered setup. The available product choice in this fitment is a blackwall Nitto NT555 G2, keeping the emphasis on modern radial performance styling and rear-axle width. This size should be considered only after confirming the car’s rear wheels are 20-inch rather than 19-inch.
In 275/35R19, the 275 is the nominal section width in millimeters, the 35 is the aspect ratio, the R identifies radial construction, and the 19 is the rim diameter in inches. For the 2019 BMW M850i xDrive, this is the rear fitment used with 19-inch wheels, complementing the narrower 245/40R19 front size in the staggered arrangement. BFGoodrich and Nitto both offer blackwall options here, with several series including g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, and NT555 G2. This is the rear size to compare when the car remains on a 19-inch wheel package.
Sub-model fitment on the 2019 BMW M850i xDrive depends mainly on body style, axle position, and wheel diameter rather than on one universal tire size. Checking the exact front or rear application matters because this car uses staggered sizing, and some versions appear with both 19-inch and 20-inch fitments.
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2019 BMW M850i xDrive Convertible Front
The 2019 BMW M850i xDrive Convertible Front uses a 245-width radial front tire, with either a 19-inch or 20-inch fitment depending on the wheel setup. Tire selection starts with confirming wheel diameter, then comparing available blackwall performance radials within the correct front size.
The 2019 BMW M850i xDrive Convertible Rear uses the wider rear portion of the staggered setup, with either a 275/35R19 or 275/30R20 radial tire. Choosing correctly means matching the rear wheel diameter first, then selecting among the available performance-oriented rear tires in that size.
The 2019 BMW M850i xDrive Coupe Front uses the same front-size pattern as the convertible, with a 245-width radial on either a 19-inch or 20-inch wheel. That makes wheel verification the main step before comparing tire series, load-related specs, and overall product character.
The 2019 BMW M850i xDrive Coupe Rear follows the staggered rear fitment with a 275-width radial tire in either 19-inch or 20-inch form. Rear tire choice should stay aligned with the wheel package already on the car so section width, profile, and rim diameter remain consistent with the setup.
The 2019 BMW M850i xDrive First Edition Front uses 245/35R20, making its front fitment more straightforward than the broader coupe and convertible range. Once the 20-inch front setup is confirmed, the decision shifts to tire series and brand preference within the available blackwall radial options.
The 2019 BMW M850i xDrive First Edition Rear uses 275/30R20, pairing a 20-inch rear wheel with the wider half of the staggered arrangement. Buyers focused on this configuration mainly need to verify the rear wheel size and then compare the available radial option for the intended driving use.
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 2019 BMW M850i xDrive Tires for Sale
Available 2019 BMW M850i xDrive tire choices focus on modern blackwall radial performance tires from BFGoodrich and Nitto. Depending on size, buyers can compare several g-Force series and the Nitto NT555 G2, with fitments covering both 19-inch and 20-inch staggered applications.
These FAQs focus on the exact tire sizes used on the 2019 BMW M850i xDrive, including staggered front and rear fitment, 19-inch versus 20-inch wheels, available tire choices, and the checks that matter before road use.
Tire Size & Fitment
What tire size fits a 2019 BMW M850i xDrive?
The 2019 BMW M850i xDrive uses a staggered radial setup rather than one all-around tire size. Front fitment is either 245/35R20 or 245/40R19, while rear fitment is either 275/30R20 or 275/35R19, depending on the wheel package and sub-model configuration.
That means the first step is identifying both axle position and wheel diameter before choosing a tire. A front size should not be treated as a rear size, and a 19-inch fitment should not be mixed with a 20-inch fitment unless the car has been intentionally set up that way and clearances, wheel specs, and overall pairing have been checked carefully.
What size rim does a 2019 BMW M850i xDrive use?
The 2019 BMW M850i xDrive uses either 19-inch or 20-inch rims, depending on the tire size and configuration on the car. The 245/40R19 and 275/35R19 sizes match 19-inch wheels, while the 245/35R20 and 275/30R20 sizes match 20-inch wheels.
Rim diameter is the most important fitment check because the tire bead must match the wheel exactly. It also helps to confirm whether the car still has its intended staggered setup, since front and rear sizes differ. Looking at the current tire sidewall and measuring the wheel setup on the car can prevent ordering the correct size for the wrong rim diameter.
Why does the 2019 BMW M850i xDrive have more than one tire size?
More than one tire size appears on the 2019 BMW M850i xDrive because the car uses staggered fitment and was offered with both 19-inch and 20-inch wheel applications. The front axle uses a 245-width tire, while the rear uses a wider 275-width tire, with profile changes tied to wheel diameter.
That combination means tire selection is not just about the model name of the car. The exact wheel package and the front or rear position both matter. Convertible, coupe, and First Edition versions can overlap in size patterns, so checking the current wheel diameter and the tire already mounted on each axle is the safest way to narrow the correct fitment.
Choosing the Right Tire
What should I consider when choosing a 245/35R20 tire for a 2019 BMW M850i xDrive?
A 245/35R20 tire for the 2019 BMW M850i xDrive should match the car’s 20-inch front-wheel application and the intended driving use. Available choices include BFGoodrich and Nitto blackwall radials, with series such as g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, and NT555 G2.
Comparing tire series is useful, but wheel compatibility still matters just as much. Several 245/35R20 options are built for an 8.0 to 9.5 inch rim-width range, and load-related specs also vary by product. Matching the correct front size first, then reviewing wheel width and product character, leads to a much better result than choosing by brand name alone.
What brands offer tires for the 2019 BMW M850i xDrive?
BFGoodrich and Nitto both offer tires for the 2019 BMW M850i xDrive. Depending on the exact size, the available products include BFGoodrich g-Force Sport Comp 2, g-Force Comp 2 AS, and g-Force Phenom T/A, along with the Nitto NT555 G2.
Brand choice should come after the fitment basics are settled, since not every brand appears in every size used on this BMW. Some front and rear sizes have several options, while others are narrower in selection. Once the exact size and axle position are confirmed, comparing series, wheel-width specifications, and sidewall style becomes more useful than comparing brands in the abstract.
What tire series are available for the 2019 BMW M850i xDrive?
The 2019 BMW M850i xDrive is served by several modern radial tire series, including BFGoodrich g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, and the Nitto NT555 G2. Availability depends on the exact front or rear size and whether the car uses 19-inch or 20-inch wheels.
Series differences matter most after the correct size has been confirmed for the axle involved. A front 245-width tire and a rear 275-width tire do not have the same product pool, and the 19-inch package differs from the 20-inch package as well. Looking at series within the right size keeps the comparison useful and avoids crossing into a different fitment entirely.
Restoration & Appearance
Which tire should I choose for a period-style 2019 BMW M850i xDrive?
A period-style approach on a 2019 BMW M850i xDrive usually means staying with the correct staggered metric radial sizes and a clean blackwall presentation. Since the available products for this car are modern blackwall radials, the main visual decision comes from keeping the proper front and rear proportions and selecting a tire series that suits the car’s grand touring character.
Because this BMW is a recent performance luxury model, appearance is shaped more by correct sizing and wheel pairing than by vintage-style sidewall treatments. Keeping 19-inch and 20-inch fitments separate, preserving the front-to-rear stagger, and avoiding profile changes that alter the stance will do more for the finished look than chasing an unsupported originality claim.
Does correct tire fitment matter for a 2019 BMW M850i xDrive restoration?
Correct tire fitment matters on a 2019 BMW M850i xDrive because the car’s appearance and setup rely on a staggered front-and-rear relationship. Using the right 245-width front size and 275-width rear size, in the proper 19-inch or 20-inch form, helps preserve the intended proportions of the wheel and tire package.
Even on a modern collector-grade car, the wrong aspect ratio or wrong rim diameter can change the stance and complicate clearance. A restoration-minded owner should confirm the actual wheels on the car, then match the tire size to that setup rather than assuming every M850i xDrive used the same wheel package. That keeps the result visually coherent and mechanically sensible.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2019 BMW M850i xDrive?
Yes, modifications can affect tire fitment on a 2019 BMW M850i xDrive. Changes such as aftermarket wheels, altered wheel widths, offset changes, lowered suspension, or body modifications can all influence whether the original 245 front and 275 rear sizes still make sense for the car’s current setup.
A modified car should be checked at the wheel itself, not just by model name. Tire size, wheel diameter, and wheel width all need to line up, and clearance at the fender, suspension, and steering range should be verified before finalizing a replacement. That is especially important on a low-profile staggered application where small setup changes can have a noticeable effect.
What should I inspect before driving a 2019 BMW M850i xDrive on new tires?
Before driving a 2019 BMW M850i xDrive on new tires, inspect that the front and rear sizes are mounted in the correct positions and that each tire matches the wheel diameter in use. It is also smart to confirm inflation, look for any mounting damage, and make sure the tires clear suspension and bodywork at full steering lock.
A staggered BMW benefits from a careful walkaround after installation because the front and rear sizes are not interchangeable. Checking for rubbing, uneven seating, or early air loss can catch problems before they turn into larger issues. A short test drive followed by another visual inspection helps verify that the new tire and wheel combination is behaving normally.
How often should tires on a 2019 BMW M850i xDrive be inspected?
Tires on a 2019 BMW M850i xDrive should be inspected regularly, especially because the car uses low-profile radial tires in a staggered setup. Frequent checks for air pressure, tread wear, cuts, bulges, and sidewall damage are worthwhile, and any car that sits for long periods deserves another inspection before returning to the road.
Routine inspections matter even more when front and rear tires are different sizes, since wear patterns can develop differently between axles. Looking over the tires before longer drives, after seasonal storage, and anytime handling changes are noticed helps catch issues early. Proper pressure and timely visual checks go a long way toward preserving both fitment integrity and road manners.
