The 2017 BMW Alpina B7 blends long-wheelbase 7 Series luxury with the discreet high-speed character that defines Alpina’s approach to grand touring. It is a modern performance sedan, but one that still rewards careful attention to staggered tire fitment because wheel diameter and front-to-rear sizing both matter. This application uses radial tires only, with either a 20-inch setup of 255/40R20 front and 295/35R20 rear or a 21-inch option using 255/35R21 front and 295/30R21 rear. That makes the real decision less about vintage-style construction and more about confirming the exact wheel package, then choosing the right size for road use, handling balance, and appearance.
Which Tire Size Is Right for The 2017 BMW Alpina B7
The 2017 BMW Alpina B7 uses four primary tire sizes because fitment changes by wheel package and by front versus rear position. Two sizes belong to the standard 20-inch staggered setup, while two others belong to the 21-inch option. Before selecting a tire, the first step is confirming wheel diameter and whether the tire is for the front or rear axle, since these sizes are not interchangeable across the vehicle.
255/35R21 is a metric radial size in which 255 is the nominal section width in millimeters, 35 is the aspect ratio, R identifies radial construction, and 21 is the wheel diameter in inches. On the 2017 BMW Alpina B7, this size serves the front position on the 21-inch option and works as part of a staggered setup rather than a square fitment. Its role is tied to the larger wheel package, so selection starts with confirming that the car actually has 21-inch front wheels. Front-axle position and wheel diameter both need to match before comparing tire choices.
295/30R21 is a metric radial size with a 295-millimeter nominal width, a 30-series profile, radial construction, and a 21-inch rim diameter. For the 2017 BMW Alpina B7, this is the rear tire size used with the 21-inch option, pairing with a narrower 255/35R21 front tire in a staggered arrangement. That makes it a rear-specific fitment rather than a general all-around size for the car. Buyers should evaluate it as part of the complete 21-inch package and verify rear wheel size and compatibility before making a replacement choice.
255/40R20 is a metric radial tire size that indicates a 255-millimeter nominal section width, a 40-series aspect ratio, radial construction, and a 20-inch wheel diameter. On the 2017 BMW Alpina B7, this size is used at the front with the 20-inch staggered setup. Available product choice in this size includes a BFGoodrich g-Force Phenom T/A Blackwall, giving buyers at least one clearly modern performance-oriented option. This size should be evaluated as the front half of the 20-inch package, with attention to correct wheel diameter and front-position fitment.
295/35R20 is a metric radial size where 295 denotes nominal width in millimeters, 35 is the aspect ratio, R means radial, and 20 identifies the wheel diameter in inches. The 2017 BMW Alpina B7 uses this size at the rear when equipped with the 20-inch wheel setup, so it belongs to a staggered front-to-rear pairing rather than a uniform tire arrangement. Product choice in this size includes a Nitto NT555 G2 Blackwall, which helps illustrate the performance-oriented character of the fitment. The key practical step is confirming rear 20-inch wheels before comparing specific tire options.
Sub-model fitment on the 2017 BMW Alpina B7 is defined by wheel package and axle position rather than by a simple one-size arrangement. Checking the exact front or rear application, along with whether the car has the 20-inch setup or the 21-inch option, is essential before choosing a tire.
1
2017 BMW Alpina B7 xDrive (21 Inch Option) Front
The 2017 BMW Alpina B7 xDrive (21 Inch Option) Front uses a dedicated radial front tire size within the larger staggered wheel package. That means replacement selection starts with confirming the 21-inch front wheels and matching the tire to the front axle rather than treating it as a universal four-corner size.
The 2017 BMW Alpina B7 xDrive (21 Inch Option) Rear uses its own radial rear size to complete the 21-inch staggered setup. Tire choice here should focus on the rear position specifically, with wheel diameter and the front-to-rear size split both confirmed before installation.
The 2017 BMW Alpina B7 xDrive Front uses the front tire size for the standard 20-inch staggered arrangement. That keeps selection straightforward once the 20-inch wheel package is confirmed, and it also allows comparison among available Blackwall performance-oriented tires in the correct front fitment.
The 2017 BMW Alpina B7 xDrive Rear uses a dedicated rear radial tire size on the 20-inch setup. Choosing correctly means matching the rear axle application and 20-inch wheel diameter, then comparing available tire options within that exact rear size rather than substituting the front fitment.
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 Alpina B7 Tires for Sale
Available product choices for the 2017 BMW Alpina B7 currently center on the 20-inch fitments, including BFGoodrich and Nitto options. These radial tires differ by tire series, sizing detail, Blackwall presentation, load specification, and rim-width compatibility.
Owners researching 2017 BMW Alpina B7 tires usually need to confirm front-versus-rear sizing, 20-inch versus 21-inch wheel fitment, and how to compare the available radial tire options. The questions below focus on size selection, wheel compatibility, product choice, and road-use checks.
Tire Size & Fitment
What tire size fits a 2017 BMW Alpina B7?
The 2017 BMW Alpina B7 uses staggered radial tire sizes, and the exact fitment depends on wheel package. The 20-inch setup uses 255/40R20 in front and 295/35R20 in the rear. The 21-inch option uses 255/35R21 in front and 295/30R21 in the rear.
That means there is not one universal tire size for every 2017 Alpina B7. The first thing to verify is whether the car has 20-inch or 21-inch wheels, and the second is whether the tire being replaced is on the front or rear axle. Matching both details is essential before comparing specific tire choices.
What size rim does a 2017 BMW Alpina B7 use?
A 2017 BMW Alpina B7 uses either 20-inch or 21-inch rims, depending on configuration. The 20-inch setup pairs with 255/40R20 front and 295/35R20 rear tires, while the 21-inch option pairs with 255/35R21 front and 295/30R21 rear tires.
Rim diameter is the first fitment checkpoint because a 20-inch tire cannot be mounted on a 21-inch wheel, and the reverse is also true. Since the car also uses staggered front and rear sizes, checking only the year and model is not enough. Confirm the actual wheel diameter on the vehicle before selecting a replacement tire.
Why does the 2017 BMW Alpina B7 have more than one tire size?
The 2017 BMW Alpina B7 has more than one tire size because it uses a staggered setup and was offered with more than one wheel diameter. Front and rear tires are different widths, and the 20-inch arrangement uses a different pair of sizes than the 21-inch option.
This matters because tire selection is tied to both axle position and wheel package. A buyer replacing one tire should not assume the opposite end of the car uses the same size, and a buyer replacing a full set should confirm the exact wheel setup already on the vehicle. That prevents mismatching front, rear, or rim diameter.
Choosing the Right Tire
What should I consider when choosing a 255/40R20 tire for a 2017 BMW Alpina B7?
Choosing a 255/40R20 tire for a 2017 BMW Alpina B7 starts with confirming that the car has the 20-inch front fitment rather than the 21-inch option. Within that size, the available product range includes a radial Blackwall performance-oriented choice from BFGoodrich in the g-Force Phenom T/A series.
The next comparison points are wheel compatibility, load specification, and the role the tire serves on the car. Since this is a front-position size in a staggered setup, it should be matched to the correct axle and wheel diameter first. Buyers should also compare rim-width suitability against the actual front wheel before making a final selection.
What brands offer tires for the 2017 BMW Alpina B7?
Current product choices for the 2017 BMW Alpina B7 include BFGoodrich and Nitto. BFGoodrich appears in the 255/40R20 front size with the g-Force Phenom T/A series, while Nitto appears in the 295/35R20 rear size with the NT555 G2 series.
Because those products apply to different positions, brand comparison should begin with the exact tire size needed rather than with the name on the sidewall alone. Confirm whether the replacement is for the front or rear axle and whether the car has the 20-inch setup. After that, compare the specific tire series and fitment details within the correct size.
What sidewall styles are available for 2017 BMW Alpina B7 tires?
The available product choices for the 2017 BMW Alpina B7 currently use a Blackwall sidewall style. That applies to the BFGoodrich option in 255/40R20 and the Nitto option in 295/35R20, both of which are radial tires intended for the 20-inch staggered setup.
For a modern Alpina sedan, Blackwall presentation suits the car’s understated performance character and keeps attention on proper size and wheel fitment. Sidewall style should still come after the main checks of front versus rear position and wheel diameter. Once the correct size is confirmed, appearance can be weighed alongside tire series and compatibility details.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2017 BMW Alpina B7?
Yes, modifications can affect tire fitment on a 2017 BMW Alpina B7, especially because the car already uses staggered sizing and more than one wheel diameter. Aftermarket wheels, suspension changes, altered ride height, or body modifications can all change the space available around the tire.
A car that left the factory with one wheel package may no longer match the expected fitment if it has been changed over the years. Checking actual wheel diameter, wheel width, and front-to-rear positioning is important before replacing tires. Clearance at the fender, suspension, and steering components should also be reviewed anytime the setup differs from stock.
What should I inspect before driving a 2017 BMW Alpina B7 on new tires?
Before driving a 2017 BMW Alpina B7 on new tires, inspect the wheel size, make sure each tire is mounted in the correct front or rear position, and confirm inflation is set appropriately for the installed tire. It is also wise to look over the wheels for damage and check valve stems and sealing surfaces.
A short road check should follow to make sure there is no rubbing, vibration, or unexpected contact under steering or suspension movement. Since this car uses a staggered arrangement, a size mix-up can cause problems even when the tire appears close at a glance. Rechecking pressure and visual condition after the first miles is a sensible final step.
What should I check before a longer drive in a 2017 BMW Alpina B7?
Before a longer drive in a 2017 BMW Alpina B7, verify that all four tires are the correct sizes for the car’s wheel package and that front and rear tires have not been mixed. Tire pressure, tread condition, visible cuts, bulges, and signs of uneven wear should all be checked before setting off.
Longer highway use puts more importance on overall tire condition than a short local trip. Age-related cracking, slow air loss, or prior impact damage can matter even when tread still looks usable. It also helps to confirm that the spare strategy, roadside tools, and wheel hardware are appropriate for the actual 20-inch or 21-inch setup on the car.
