The 2015 Bentley Mulsanne represents Bentley’s modern flagship approach to traditional luxury, combining hand-finished presence with the kind of road manners expected from a full-size grand touring sedan. On a car of this caliber, tire choice affects far more than appearance alone, because the Mulsanne uses two radial fitments: 265/45R20 and 265/40R21. That means the first step is confirming which wheel diameter is on the car before comparing tires. Once that is settled, the decision becomes one of matching the proper metric radial size to the vehicle’s actual wheel setup, intended driving use, and any changes made since new.
Which Tire Size Is Right for The 2015 Bentley Mulsanne
The 2015 Bentley Mulsanne uses two primary tire sizes, and the difference comes down to wheel diameter rather than a change from bias-ply to radial construction. Both fitments are radial, but one is for a 20-inch wheel and the other is for a 21-inch wheel, so confirming the actual wheel size on the car is the first and most important step before choosing tires.
A 265/40R21 tire uses a 265-millimeter nominal section width, a 40-series aspect ratio, radial construction, and a 21-inch rim diameter. On a 2015 Bentley Mulsanne, this size belongs to cars equipped with 21-inch wheels, so its role is tied directly to wheel selection rather than to a different vehicle model. The lower-profile format gives this size a distinctly modern metric radial character compared with older numeric systems. Choosing it starts with verifying that the car actually wears 21-inch wheels and that the current wheel and suspension setup remains consistent with this fitment.
A 265/45R20 tire also uses a 265-millimeter nominal section width and radial construction, but its 45-series profile is paired with a 20-inch rim diameter. For the 2015 Bentley Mulsanne, this size serves vehicles fitted with 20-inch wheels, making wheel confirmation the key difference between it and the 21-inch option. Its metric radial format is straightforward for modern fitment work, but it should still be treated as a specific wheel-based application rather than a universal alternative. This is the size to evaluate when the Mulsanne retains or has been set up with 20-inch wheels.
Sub-model fitment is straightforward here because the 2015 Bentley Mulsanne Base is associated with both primary tire sizes. The important check is not trim level, but whether the car is fitted with 20-inch or 21-inch wheels before selecting a tire.
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2015 Bentley Mulsanne Base
The 2015 Bentley Mulsanne Base can use either of the two radial fitments tied to this model year. Tire selection centers on confirming the wheel diameter already on the car, then matching the correct metric size to that setup and checking for any aftermarket wheel or suspension changes.
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.
Frequently Asked Questions
Tire questions for a 2015 Bentley Mulsanne usually come down to size, wheel diameter, and choosing the correct modern radial fitment. The FAQs below focus on 20-inch versus 21-inch applications, practical selection points, and checks to make before road use.
Tire Size & Fitment
What tire size fits a 2015 Bentley Mulsanne?
The 2015 Bentley Mulsanne uses two primary tire sizes: 265/45R20 and 265/40R21. Both are radial fitments, and both are associated with the Mulsanne Base, so the correct choice depends on which wheel diameter is on the car rather than on a different construction type.
The practical next step is to inspect the wheels already installed and confirm whether the car has 20-inch or 21-inch rims. Even though the two sizes are close in overall dimensions, they are not the same fitment, and tire selection should also take into account any wheel changes, suspension modifications, or clearance issues introduced after the car left the factory setup.
What size rim does a 2015 Bentley Mulsanne use?
A 2015 Bentley Mulsanne uses either a 20-inch or 21-inch rim, depending on which tire size is fitted. The 265/45R20 tire goes with a 20-inch wheel, while the 265/40R21 tire goes with a 21-inch wheel.
That makes wheel diameter the first thing to verify before comparing tires. Looking only at the vehicle badge is not enough, because the same Mulsanne Base can be associated with both fitments. Checking the size molded into the current tire sidewall and confirming the actual wheel dimensions helps prevent ordering a tire that matches the car in name but not the wheel on the vehicle.
Does the 2015 Bentley Mulsanne Base use the same tire size?
The 2015 Bentley Mulsanne Base is associated with both 265/45R20 and 265/40R21 radial tire sizes. In other words, the Base designation alone does not narrow the fitment to one single tire size.
That means the deciding factor is the wheel package on the individual car. A Mulsanne that has 20-inch wheels should stay with the 265/45R20 fitment, while a car with 21-inch wheels should use 265/40R21. Since luxury cars are sometimes updated with replacement wheels, it is smart to verify the current setup directly instead of assuming every Base model uses the same tire.
Choosing the Right Tire
What should I consider when choosing a tire for a 2015 Bentley Mulsanne?
Start with the correct primary size for the wheel on the car: 265/45R20 for a 20-inch rim or 265/40R21 for a 21-inch rim. Because both are modern radial sizes, the core decision is less about construction type and more about matching the exact fitment to the vehicle’s current wheel package.
After size is confirmed, compare the tire’s intended use with how the Mulsanne is driven, whether mostly local cruising, regular road use, or longer-distance touring. Wheel condition, alignment, and any changes to ride height or wheel dimensions should be reviewed as well, since a large luxury sedan can be sensitive to setup differences that affect ride quality, clearance, and overall fitment.
How do I choose between the available 2015 Bentley Mulsanne tire sizes?
The two sizes are not alternatives to pick by preference alone; they correspond to different rim diameters. A 2015 Bentley Mulsanne with 20-inch wheels uses 265/45R20, while one with 21-inch wheels uses 265/40R21.
Selection should begin at the wheel, not at the sidewall profile. Once the rim diameter is confirmed, use the tire size intended for that wheel and inspect whether the car still has its original wheel setup or has been changed with aftermarket wheels. That approach keeps the buying decision focused and avoids treating two legitimate fitments as though they are automatically interchangeable on the same wheel.
What rim-fitment details should I compare when choosing 2015 Bentley Mulsanne tires?
The key rim-fitment detail is diameter, because the 2015 Bentley Mulsanne uses either a 20-inch or 21-inch wheel. The tire size must match that diameter exactly, so 265/45R20 belongs on a 20-inch rim and 265/40R21 belongs on a 21-inch rim.
Beyond diameter, it helps to confirm the wheel’s actual width and overall condition, especially if the car has had replacement or aftermarket wheels installed. Luxury sedans with large-diameter wheels can also be sensitive to offset and clearance changes, so checking the full wheel setup before mounting new tires is a better path than relying only on what may have been used previously.
Restoration & Appearance
Does correct tire fitment matter for a 2015 Bentley Mulsanne restoration?
Yes, correct tire fitment still matters on a 2015 Bentley Mulsanne, even though it is a much newer vehicle than a traditional restoration-era classic. The right tire size preserves the intended relationship between the wheel diameter and the tire profile, which is especially important on a flagship luxury car with a very deliberate visual stance.
A restoration-minded owner should begin by confirming whether the car is being returned to its original wheel configuration or preserved as currently equipped. That determines whether 265/45R20 or 265/40R21 belongs on the car. If appearance accuracy is especially important, vehicle-specific sales literature, build information, and marque expertise can help confirm which wheel-and-tire presentation best matches the car.
Which tire should I choose for a period-style 2015 Bentley Mulsanne?
A period-style choice for a 2015 Bentley Mulsanne starts with using the correct modern metric radial size for the wheel on the car. That means 265/45R20 for a 20-inch setup or 265/40R21 for a 21-inch setup, keeping the car within the fitment language of its own era.
Since this is a modern luxury sedan rather than a bias-ply-era car, period-style presentation is more about preserving the proper wheel-and-sidewall proportion than choosing between vintage sidewall treatments. The best approach is to keep the size matched to the wheel diameter already established for the car and avoid substitutions that noticeably change the Mulsanne’s intended visual balance or roadgoing character.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2015 Bentley Mulsanne?
Yes, modifications can affect tire fitment on a 2015 Bentley Mulsanne. Wheel changes, suspension lowering, altered offsets, or non-original wheel widths can all change how a 265/45R20 or 265/40R21 tire sits in the wheel opening and how much clearance is available during steering and suspension movement.
That is why the actual setup on the car should be checked before replacing tires, especially on a vehicle that may have passed through multiple owners. Verifying wheel diameter is only the beginning; clearance around fenders, inner liners, and suspension components deserves attention too. A tire that matches the nominal size still needs to suit the real-world wheel and chassis configuration currently in place.
What should I inspect before driving a 2015 Bentley Mulsanne on new tires?
Before road use, inspect the wheel condition, tire pressure, valve stems, and the basic mounting match between the tire size and the wheel diameter. On a 2015 Bentley Mulsanne, that means making sure a 265/45R20 is on a 20-inch wheel or a 265/40R21 is on a 21-inch wheel.
A short follow-up check after initial driving is also worthwhile. Look for any signs of rubbing, uneven contact, vibration, or air loss, and keep an eye on alignment if the car tracks differently than expected. On a heavy luxury sedan, small issues can show up quickly in ride quality, so early inspection helps catch setup problems before they become tire-wear problems.
How often should tires on a 2015 Bentley Mulsanne be inspected?
Tires on a 2015 Bentley Mulsanne should be inspected regularly, not only by time interval but also before longer drives and after any noticeable change in ride, steering feel, or air pressure. Large modern radial tires deserve routine checks for tread wear, cuts, bulges, cracking, and signs of uneven shoulder wear.
Collector or low-mileage use does not eliminate the need for inspection, because a car that sits can still develop age-related tire issues. It also helps to review pressure and overall condition after storage, especially if the Mulsanne spends long periods parked. Consistent inspections support both ride quality and fitment confidence, whether the car is on 20-inch or 21-inch wheels.
