The 2021 BMW 740i sits in the modern full-size luxury-sedan class, where long-wheelbase comfort, quiet high-speed travel, and precise road manners all play a major role in the driving experience. Tire selection on this car is more configuration-specific than it first appears, because the 740i uses several radial sizes across 18-, 19-, and 20-inch wheel setups, including staggered front and rear fitments. That means the real choice is not just brand, but also confirming whether the car has a square or staggered arrangement. Available options also vary by sidewall treatment and tire series, which matters if appearance is part of the decision along with road use and wheel compatibility.
Which Tire Size Is Right for The 2021 BMW 740i
The 2021 BMW 740i uses five primary tire sizes, and the correct one depends on wheel diameter and whether the car is using a square setup or a staggered front-and-rear arrangement. Before choosing a tire, confirm the exact wheel package on the car, because 18-inch, 19-inch, and 20-inch fitments are all used here, and the front and rear sizes are not always the same.
245/45R19 is a metric radial size with a 245-millimeter section width, a 45-series profile, and fitment for a 19-inch wheel. On the 2021 BMW 740i, it serves as one of the front or square-fitment sizes, making it relevant for owners who need to match an existing 19-inch wheel setup. Available choices include BFGoodrich and Nitto options in blackwall form across g-Force and NT555 G2 lines. This size is the right place to start when the car has 19-inch wheels and the front axle or all four corners use the same width.
245/50R18 is a metric radial that combines a 245-millimeter section width with a taller 50-series sidewall on an 18-inch rim. For the 2021 BMW 740i, this size represents the 18-inch square fitment and gives the buyer a straightforward replacement path when the car remains on that wheel diameter. Product choices in this size include Pro-Trac Street Pro III tires with either raised white letter or redline sidewall styling. It is the size to evaluate when preserving the car's 18-inch setup matters more than moving to a larger wheel package.
245/40R20 is a metric radial size with a 245-millimeter section width, a lower 40-series profile, and a 20-inch rim diameter. On the 2021 BMW 740i, this is used as a front fitment in the 20-inch staggered arrangement, so it should be matched to the corresponding rear size rather than treated as a universal four-corner choice. Options include BFGoodrich, Nitto, and Pro-Trac lines, with blackwall, raised white letter, and redline sidewall treatments available. This size matters when the car has 20-inch front wheels and the goal is to keep the intended staggered layout intact.
275/35R20 is a wider metric radial that uses a 275-millimeter section width, a 35-series profile, and a 20-inch wheel diameter. For the 2021 BMW 740i, it serves as the rear size in the 20-inch staggered setup, so its job is tied directly to matching the proper front tire and preserving the wheel-package balance. BFGoodrich, Nitto, and Pro-Trac offerings are available here, with blackwall, raised white letter, and redline presentations depending on the tire line. This is the size to confirm when replacing the rear tires on a 20-inch staggered 740i.
275/40R19 is a metric radial with a 275-millimeter section width, a 40-series sidewall, and fitment for a 19-inch rim. On the 2021 BMW 740i, it is the rear size used with the 19-inch staggered setup, so it belongs with the matching 245/45R19 front tire rather than being selected in isolation. Available choices include several BFGoodrich g-Force variants along with the Nitto NT555 G2, all in blackwall form. This size becomes essential when the car carries a 19-inch staggered configuration and rear-wheel fitment needs to stay consistent.
Sub-model fitment on the 2021 BMW 740i is driven mainly by wheel position and wheel package rather than trim variation. Checking whether the car is in Base form or uses the separate front and rear staggered sizes is the key step before choosing tires.
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2021 BMW 740i Base
The 2021 BMW 740i Base uses a square radial setup, with either an 18-inch or 19-inch tire size depending on the wheel package on the car. That makes wheel-diameter confirmation the first priority, followed by choosing among the available tire lines and sidewall treatments in the correct size.
The 2021 BMW 740i Base Front fitment covers the front axle in staggered radial setups, using either the 19-inch or 20-inch front tire size. Tire selection here should focus on matching the actual front wheel diameter and keeping the front size paired correctly with the corresponding rear fitment.
The 2021 BMW 740i Base Rear fitment applies to the rear axle in staggered radial configurations, where the rear tire is wider than the front. Choosing correctly means confirming whether the car has the 19-inch or 20-inch staggered package and then matching the rear tire to the front setup already on the vehicle.
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 2021 BMW 740i Tires for Sale
Available 2021 BMW 740i tire choices vary by size, wheel package, and intended look. BFGoodrich, Nitto, and Pro-Trac options appear across g-Force, NT555 G2, and Street Pro III lines, with blackwall, raised white letter, and redline sidewall treatments depending on the size.
These FAQs focus on the tire sizes used on the 2021 BMW 740i, how the front and rear fitments differ, and what to compare before choosing among available radial tires, sidewall styles, and wheel-specific options.
Tire Size & Fitment
What tire size fits a 2021 BMW 740i?
The 2021 BMW 740i uses 245/50R18, 245/45R19, 245/40R20, 275/40R19, and 275/35R20 tires, all in radial construction. Some of these are square fitments, while others are part of staggered front-and-rear setups where the rear tire is wider than the front.
The important step is identifying the actual wheel package on the car before buying tires. An 18-inch Base setup uses a different size than a 19-inch or 20-inch arrangement, and staggered cars need the correct front and rear pairing rather than four tires in one size.
What size rim does a 2021 BMW 740i use?
The 2021 BMW 740i uses 18-inch, 19-inch, and 20-inch rim diameters depending on configuration. Those wheel diameters correspond to the primary tire sizes used on the car, including square and staggered setups with different front and rear tire widths.
Checking the wheel itself matters because tire size follows rim diameter exactly. A 245/50R18 cannot be treated like a 245/45R19 or 245/40R20 choice, and the staggered 19- and 20-inch setups also require the rear wheel and tire to match the intended wider rear fitment.
Why does the 2021 BMW 740i have more than one tire size?
The 2021 BMW 740i has more than one tire size because it was fitted with different wheel packages, including square arrangements and staggered front-and-rear combinations. That creates multiple valid radial sizes across 18-, 19-, and 20-inch diameters instead of one universal fitment.
That difference changes the buying process more than the brand choice does. The first job is confirming whether the car has the same size on all four corners or uses separate front and rear sizes, then matching the tire to the existing wheel diameter and axle position before comparing product options.
Choosing the Right Tire
What should I consider when choosing a 2021 BMW 740i tire?
Start with the correct tire size and wheel diameter, because the 2021 BMW 740i uses several radial fitments across 18-, 19-, and 20-inch wheels. After size is confirmed, compare the available tire line, sidewall style, and any wheel-width or load details that matter to the way the car is used.
A square setup and a staggered setup should not be approached the same way. Matching the tire to the actual front or rear position is especially important on staggered cars, while owners of square-fitment cars can focus more on appearance, brand preference, and the character of the available product lines.
What sidewall styles are available for 2021 BMW 740i tires?
Sidewall choices for the 2021 BMW 740i include blackwall, raised white letter, and redline depending on tire size. Blackwall options appear across several BFGoodrich and Nitto sizes, while Pro-Trac Street Pro III options bring raised white letter and redline styling in selected 18-inch and 20-inch sizes.
That means sidewall appearance is part of the decision, but only after the fitment is confirmed. A style offered in one 740i size may not appear in another, so owners should first verify the exact wheel and axle setup, then compare whether the available sidewall treatment suits the car's intended look.
What brands offer tires for the 2021 BMW 740i?
BFGoodrich, Nitto, and Pro-Trac all offer tire choices for the 2021 BMW 740i, depending on size. BFGoodrich appears in several g-Force lines, Nitto is represented by the NT555 G2, and Pro-Trac covers selected sizes in the Street Pro III series.
The useful comparison is not brand alone, but how each option lines up with the exact fitment on the car. Some sizes have only blackwall choices, while others add raised white letter or redline styling, so the final selection should balance proper size, wheel compatibility, and the look the owner wants.
Restoration & Appearance
Which tire should I choose for a period-style 2021 BMW 740i?
A period-style choice for a 2021 BMW 740i starts with keeping the correct wheel diameter and the proper square or staggered sizing already on the car. From there, the most appearance-driven options are the Pro-Trac Street Pro III tires in sizes where raised white letter or redline sidewalls are available.
This is less about strict restoration than about presentation, since the 740i is a modern luxury sedan rather than a vintage collector car. Buyers aiming for a more traditional or custom look should confirm that the preferred sidewall treatment is offered in the exact front or rear size needed.
How does tire construction affect the appearance of a restored 2021 BMW 740i?
On the 2021 BMW 740i, construction does not create a bias-ply-versus-radial appearance choice because the primary fitments are radial. Visual differences come more from the sidewall treatment and tire line than from construction type, especially in sizes where blackwall, raised white letter, or redline options are available.
For an appearance-focused build, the wheel package still sets the foundation. A 20-inch staggered setup presents differently than an 18-inch square arrangement, so maintaining the intended stance and proportions usually matters more than chasing a construction change that is not part of this car's primary fitment.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2021 BMW 740i?
Yes, modifications can affect tire fitment on a 2021 BMW 740i. Aftermarket wheels, changes in wheel width, altered offsets, suspension lowering, or body modifications can all change how a 245- or 275-section tire sits in the wheelwell and how much clearance it has during steering and suspension travel.
That matters even when the tire size itself is correct for a factory setup. A modified 740i should have the actual wheel diameter, wheel width, and front-to-rear arrangement checked before tire selection, especially on staggered 19-inch and 20-inch combinations where front and rear sizes serve different positions.
What should I inspect before driving a 2021 BMW 740i on new tires?
Before putting a 2021 BMW 740i into regular road use on new tires, inspect the wheels for the correct diameter and condition, confirm that the tire sizes match the car's actual setup, and check for any obvious clearance issues. Tire pressure, valve condition, and proper front-to-rear placement also deserve attention.
A short road test should follow any tire change, especially on a staggered setup where front and rear sizes differ. Listen for rubbing, watch for vibration, and recheck inflation after the first drive so the car starts out with the right size, the right position, and stable on-road behavior.
How often should tires on a 2021 BMW 740i be inspected?
Tires on a 2021 BMW 740i should be inspected regularly rather than only at replacement time. Routine checks should look for uneven wear, cuts, bulges, cracking, and gradual air loss, while also confirming that the front and rear tires remain in the correct positions on cars using staggered fitments.
Frequent inspection is especially useful when the car is driven less often or stored for periods between trips. A luxury sedan that spends time parked can still develop age-related or pressure-related issues, so checking condition before longer drives helps catch problems before they affect ride quality or clearance.
