The 2004 BMW 745i marked a major step in BMW’s full-size luxury sedan lineup, blending advanced technology, V8 power, and a chassis tuned to deliver a distinctly driver-focused feel in a premium four-door package. Tire choice matters on this car because fitment can be either a square 245/50R18 setup or a staggered 19-inch arrangement with 245/45R19 front and 275/40R19 rear radials. That means the key decision is not just size, but also confirming wheel diameter and whether the car carries the 18-inch or staggered 19-inch configuration. Available options range from blackwall performance radials to RWL and redline styles in 18-inch form, so appearance and intended road use both deserve attention.
Which Tire Size Is Right for The 2004 BMW 745i
The 2004 BMW 745i uses three primary tire sizes, and the right one depends on whether the car has the 18-inch setup or the staggered 19-inch front-and-rear arrangement. Confirming the wheel diameter is the first step, then matching the correct position-specific size if the car uses 19-inch wheels. Once that is established, the choice shifts to tire series, sidewall style, and the overall character you want from the car.
245/50R18 is a metric radial size in which 245 identifies the tire width in millimeters, 50 is the aspect ratio, R indicates radial construction, and 18 is the rim diameter in inches. On the 2004 BMW 745i, this size serves the 18-inch configuration and keeps the fitment straightforward because the same size is used at that wheel diameter. Available choices include Pro-Trac Street Pro III options with either RWL or redline sidewall treatment. It is the size to evaluate when the car has 18-inch wheels and the goal is to balance proper fitment with a more customized visual presentation.
245/45R19 is a metric radial size that combines a 245-millimeter nominal width with a 45-series profile on a 19-inch rim. On the 2004 BMW 745i, this is the front tire size for the staggered 19-inch setup, so it should be selected with the matching rear size rather than treated as a standalone all-around fitment. Product choices in this size come from BFGoodrich and Nitto, with blackwall sidewalls and several g-Force and NT555 G2 series options. It is the correct starting point when the car uses 19-inch front wheels and the owner wants to preserve the intended front-to-rear sizing relationship.
275/40R19 is a wider metric radial size, with 275 denoting nominal section width in millimeters, 40 identifying the aspect ratio, and 19 indicating rim diameter. On the 2004 BMW 745i, this size is used at the rear in the staggered 19-inch arrangement, where the broader footprint is part of the vehicle’s position-specific fitment. BFGoodrich and Nitto both offer blackwall choices here across series such as g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, and NT555 G2. This is the rear size to confirm when maintaining the staggered setup and comparing performance-oriented radial options.
Sub-model fitment on the 2004 BMW 745i varies because one configuration uses 18-inch tires while another uses a staggered 19-inch front-and-rear setup. Checking the exact sub-model or wheel position matters before choosing a tire, especially on cars with different front and rear sizes.
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2004 BMW 745i Base
The 2004 BMW 745i Base uses the 245/50R18 radial size with an 18-inch wheel. That makes tire selection more straightforward, with the main decision centered on the available sidewall treatment and overall tire style rather than matching different front and rear sizes.
The 2004 BMW 745i Base Front uses the 245/45R19 radial size as part of the 19-inch staggered arrangement. Tire selection here should stay tied to the matching rear setup so the car keeps its intended front-to-rear fitment balance.
The 2004 BMW 745i Base Rear uses the wider 275/40R19 radial size on a 19-inch rim. That means rear tire choice should be made as part of the complete staggered package, with attention to wheel width and consistent compatibility with the front tires.
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 2004 BMW 745i Tires for Sale
Available 2004 BMW 745i tire choices include Pro-Trac, BFGoodrich, and Nitto radials across Street Pro III, g-Force, and NT555 G2 series. Buyers can compare 18-inch RWL or redline styling against 19-inch blackwall performance options, along with rim-width, load-capacity, and weight differences where applicable.
These FAQs focus on the tire sizes used on the 2004 BMW 745i, how the 18-inch and staggered 19-inch setups differ, and what to review when comparing brands, sidewall styles, wheel fitment, and road-use readiness.
Tire Size & Fitment
What tire size fits a 2004 BMW 745i?
The 2004 BMW 745i uses either 245/50R18 or a staggered 19-inch setup with 245/45R19 in front and 275/40R19 in the rear. All of these are radial tire sizes, but they do not serve the same role on the car. The 18-inch setup is a square fitment, while the 19-inch setup uses different front and rear sizes.
The first thing to confirm is which wheels are actually on the car. A 745i with 18-inch wheels should stay with 245/50R18, while a car with 19-inch staggered wheels needs the correct position-specific sizes. If aftermarket wheels have been installed, check actual wheel diameter and width before choosing tires.
What size rim does a 2004 BMW 745i use?
The 2004 BMW 745i uses either an 18-inch rim or a 19-inch rim, depending on the tire setup. The 245/50R18 size mounts on an 18-inch wheel, while both 245/45R19 and 275/40R19 mount on 19-inch wheels. The 19-inch arrangement is staggered, with the narrower tire up front and the wider tire in the rear.
Wheel diameter should always be confirmed before ordering tires, especially on a luxury sedan that may have changed hands or been modified over time. It also helps to verify wheel width when comparing 19-inch performance tires, since some products include specific rim-width ranges that affect whether a given tire is appropriate.
Why does the 2004 BMW 745i have more than one tire size?
More than one tire size appears on the 2004 BMW 745i because the car was fitted in different wheel configurations. One setup uses 245/50R18 at all four corners, while another uses a staggered 19-inch combination with 245/45R19 in front and 275/40R19 in the rear. Those are separate fitment arrangements rather than interchangeable primary sizes.
That distinction matters because the tire choice should match the wheel package already on the car. On a staggered setup, the front and rear sizes work together and should be selected as a pair. Looking only at the year and model is not enough if the 745i has different wheel diameters or wheel widths than expected.
Choosing the Right Tire
What should I consider when choosing a tire for a 2004 BMW 745i?
Start with the correct size and wheel configuration. A 2004 BMW 745i may use 245/50R18 all around or a 19-inch staggered setup with 245/45R19 front and 275/40R19 rear. From there, compare construction, tire series, sidewall style, rim-width compatibility where stated, and any product-specific weight or load-capacity details that matter to your intended use.
A square 18-inch setup usually makes the choice simpler, while the staggered 19-inch arrangement requires closer attention to front and rear positions. It also helps to decide whether the goal is a more understated blackwall performance look or a more styled appearance such as RWL or redline in the 18-inch size.
What sidewall styles are available for 2004 BMW 745i tires?
Sidewall style depends on the tire size chosen for the 2004 BMW 745i. In 245/50R18, available options include RWL and redline treatments. In the 19-inch sizes, 245/45R19 and 275/40R19 are offered in blackwall form across several performance-oriented radial series, giving the larger-wheel setup a more modern and understated appearance.
That means sidewall choice is tied closely to the wheel package already on the car. An owner keeping 18-inch wheels can lean into a more customized visual statement, while a 19-inch staggered setup focuses more on blackwall performance tires. Appearance should still be balanced against correct sizing and wheel compatibility.
What brands offer tires for the 2004 BMW 745i?
Tire options for the 2004 BMW 745i include Pro-Trac, BFGoodrich, and Nitto. Pro-Trac appears in the 245/50R18 size through the Street Pro III line, while BFGoodrich and Nitto cover the 19-inch sizes with series such as g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2.
Brand choice should be considered alongside the actual fitment on the car, not as a separate decision. The 18-inch and 19-inch setups do not share the same assortment, so the first step is always confirming size and wheel position. After that, compare each tire’s series character, sidewall treatment, and wheel-width suitability where stated.
Restoration & Appearance
Which tire should I choose for a period-style 2004 BMW 745i?
A period-style choice for a 2004 BMW 745i usually starts with preserving the wheel diameter and overall tire configuration already appropriate to the car. That may mean 245/50R18 for the square setup or the staggered 245/45R19 front and 275/40R19 rear arrangement. Keeping the proper sizing relationship is more important than chasing a style cue that does not match the wheel package.
Appearance then comes down to how subtle or expressive the finished look should be. The 18-inch size offers RWL and redline choices, while the 19-inch options are blackwall performance radials. For buyers pursuing a truly era-specific presentation, marque references and original vehicle documentation remain the best way to verify visual details.
How does tire construction affect the appearance of a restored 2004 BMW 745i?
On the 2004 BMW 745i, the primary fitments are radial tires, so the construction itself aligns with the car’s modern luxury-sedan character. The visual difference is less about bias-ply versus radial and more about sidewall presentation, wheel diameter, and whether the car uses the 18-inch square setup or the staggered 19-inch arrangement.
That makes the styling decision fairly specific: 18-inch tires can introduce RWL or redline detail, while 19-inch choices stay in blackwall form and emphasize a cleaner, more contemporary appearance. A well-fitted tire that matches the wheel setup usually does more for the finished look than an eye-catching sidewall on the wrong size.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2004 BMW 745i?
Yes, modifications can affect tire fitment on a 2004 BMW 745i. Changes such as aftermarket wheels, altered wheel widths, suspension lowering, or bodywork adjustments can change the space available for 245/50R18, 245/45R19, or 275/40R19 tires. That is especially important on the staggered 19-inch setup, where the rear tire is substantially wider than the front.
A modified car should be checked for more than just rim diameter. Wheel width, offset, steering clearance, and fender clearance all matter before choosing replacement tires. Even when the tire size matches the original configuration, a changed suspension or wheel package can alter how that size behaves once mounted on the vehicle.
What should I inspect before driving a 2004 BMW 745i on new tires?
Before driving a 2004 BMW 745i on new tires, inspect wheel condition, verify that each tire matches the correct size and wheel position, and make sure inflation is set appropriately for the installed tires. It is also smart to look over valve stems, check for visible mounting damage, and confirm that the staggered 19-inch setup has the correct front and rear sizes in place.
A short initial road check can reveal issues such as vibration, rubbing, or uneven clearance that are easier to address early. It also helps to confirm alignment and suspension condition on a car like the 745i, since worn components can affect how evenly new tires wear and how the car tracks at speed.
How should tires on a collector-era 2004 BMW 745i be maintained?
Tires on a low-use 2004 BMW 745i should be inspected regularly for pressure loss, sidewall cracking, bulges, tread wear, and any signs of aging that may be easy to miss when the car spends time parked. Collector-use cars often accumulate fewer miles, so condition and age matter just as much as remaining tread depth.
Storage habits also make a difference. Keeping the car away from prolonged sunlight, excess heat, moisture, and ozone sources can help preserve tire condition between drives. It is wise to check pressures before every outing and give extra attention to staggered 19-inch cars, where front and rear tires differ in size and cannot be rotated front to back.
