The 2008 Bentley Arnage represents the final era of Bentley’s hand-built, old-school luxury sedan, combining substantial road presence with the kind of long-distance refinement buyers expect from a flagship British saloon. By this point, the Arnage had become as much a collector sedan as a modern grand tourer. Tire selection centers on two primary radial sizes, 255/45R19 and 255/50R18, both used on the Arnage and tied to different wheel diameters rather than different construction types. That makes the real decision less about bias-ply versus radial and more about confirming which wheel setup is on the car. Once that is settled, attention can shift to proper size matching, ride intent, and overall fitment.
Which Tire Size Is Right for The 2008 Bentley Arnage
The 2008 Bentley Arnage uses two primary tire sizes, and the key difference between them is wheel diameter: one fits an 18-inch rim and the other fits a 19-inch rim. Because Arnage R, RL, and T models can use either size, the first step is confirming which wheels are actually on the car before choosing a tire.
Tire fitment is straightforward across the covered 2008 Bentley Arnage sub-models because Arnage R, RL, and T models all share the same two tire-size possibilities. The important step is not trim identification alone, but confirming whether the car is wearing 18-inch or 19-inch wheels.
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2008 Bentley Arnage R
The 2008 Bentley Arnage R can use either of the two primary radial tire sizes fitted to this model line, depending on the wheel diameter on the car. Tire selection starts with confirming whether the sedan has 18-inch or 19-inch rims, then matching the tire size to that wheel setup.
The 2008 Bentley Arnage RL shares the same basic tire-fitment pattern as the rest of the range, with radial tires used in either an 18-inch or 19-inch wheel configuration. That means the buyer should verify the actual wheel diameter first, then choose the correct size for the car’s present setup.
The 2008 Bentley Arnage T also uses one of two radial tire sizes, with fitment determined by wheel diameter rather than a separate construction type. Choosing correctly comes down to confirming the car’s current 18-inch or 19-inch wheels and avoiding assumptions based on model name alone.
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
These 2008 Bentley Arnage tire FAQs focus on the two correct radial sizes, the difference between the 18-inch and 19-inch wheel setups, and the fitment checks that matter before road use on a large luxury sedan.
Tire Size & Fitment
What tire size fits a 2008 Bentley Arnage?
The 2008 Bentley Arnage uses two primary tire sizes: 255/45R19 and 255/50R18. Both are radial metric sizes, and both are used on the Arnage depending on which wheel diameter is on the car rather than on a change in tire construction.
That means the first job is to confirm whether the car has 18-inch or 19-inch wheels. The two sizes share the same stated overall diameter and section width in this application, but each is matched to a different rim diameter, so choosing by appearance alone can lead to the wrong fitment.
What size rim does a 2008 Bentley Arnage use?
A 2008 Bentley Arnage uses either an 18-inch rim or a 19-inch rim, depending on the wheel setup on the vehicle. The 255/50R18 tire fits the 18-inch wheel, while the 255/45R19 tire fits the 19-inch wheel.
Rim diameter should be verified directly on the wheel or by confirming the tire size already mounted on the car. Even though all Arnage R, RL, and T sub-models can use these same two tire sizes, the tire must match the actual wheel diameter currently installed on the vehicle.
Do all 2008 Bentley Arnage sub-models use the same tire size?
Arnage R, Arnage RL, and Arnage T models all share the same two tire-size possibilities: 255/45R19 and 255/50R18. The fitment pattern is consistent across the covered sub-models, with the difference coming from wheel diameter rather than from a separate tire construction or trim-specific tire type.
That makes wheel confirmation more important than the sub-model badge alone. A buyer looking at a 2008 Bentley Arnage should check whether the car is wearing 18-inch or 19-inch wheels, especially if the vehicle has had wheel changes over time or has been maintained by more than one owner.
Choosing the Right Tire
What should I consider when choosing a 255/45R19 or 255/50R18 tire for a 2008 Bentley Arnage?
Start with the correct size for the wheel diameter on the car: 255/45R19 for a 19-inch rim or 255/50R18 for an 18-inch rim. Both are metric radial sizes used on the 2008 Bentley Arnage, so the main fitment issue is matching the tire to the existing wheel setup.
After that, compare the tire’s intended use with how the Arnage is driven, whether that means occasional collector use, regular road miles, or long-distance touring. It is also smart to confirm wheel condition, suspension health, and clearance before installation, particularly on a heavy luxury sedan where tire and chassis condition work closely together.
How do I choose between the available 2008 Bentley Arnage tire sizes?
You do not choose between 255/45R19 and 255/50R18 as interchangeable options on the same rim. The correct choice depends on whether the 2008 Bentley Arnage has 19-inch wheels or 18-inch wheels, since each tire size is built around a different rim diameter.
If the car still has its existing wheel setup, matching the tire to that wheel is the right path. If the car has changed hands, has aftermarket wheels, or has had a wheel conversion at some point, inspect the wheel markings and current tire size so the replacement tire follows the actual hardware on the vehicle.
What does 255/45R19 mean on a 2008 Bentley Arnage?
In 255/45R19, the 255 is the nominal section width in millimeters, 45 is the aspect ratio, R means radial construction, and 19 is the rim diameter in inches. On a 2008 Bentley Arnage, this is one of the two primary modern metric radial sizes used with the larger wheel option.
Understanding the code helps prevent mix-ups with the 255/50R18 alternative. Both sizes are similar in overall dimensions in this application, but they are not meant for the same wheel diameter, so the practical takeaway is to verify the rim size first and then match the complete tire code.
Restoration & Appearance
Does correct tire fitment matter for a 2008 Bentley Arnage restoration?
Yes, correct tire fitment matters on a 2008 Bentley Arnage restoration because the car uses specific modern radial sizes tied to either an 18-inch or 19-inch wheel. The right size preserves the intended relationship between the wheel, tire sidewall, and body proportions on a large luxury sedan.
A restoration-minded buyer should confirm the wheel diameter actually fitted to the car before replacing tires. If originality is an important goal, it also helps to compare the current wheel-and-tire setup with marque references, period photos, or build documentation so the finished presentation reflects the car’s proper era and equipment.
How does tire construction affect the appearance of a restored 2008 Bentley Arnage?
On a 2008 Bentley Arnage, tire construction is less of an appearance debate than it is on older collector vehicles because both primary fitments are radial sizes. The visual difference comes more from using the correct 18-inch or 19-inch size and maintaining the proper sidewall proportion for the wheel on the car.
That makes dimensional accuracy especially important during cosmetic restoration. A tire that matches the intended size helps the Arnage keep its formal, substantial stance, while an incorrect wheel-and-tire combination can make the sedan look under-tired or overly modified even before any driving impressions come into play.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2008 Bentley Arnage?
Yes, modifications can affect tire fitment on a 2008 Bentley Arnage. Changes such as aftermarket wheels, altered offsets, suspension lowering, or non-original ride-height components can all influence whether a 255/45R19 or 255/50R18 tire has the clearance and wheel match it needs.
A modified Arnage should be checked at the wheel wells, steering range, and suspension travel before replacing tires. Even when the tire size itself is one of the correct factory-style fitments, wheel design and chassis changes can alter how that tire sits in the car compared with an unmodified example.
What should I inspect before driving a 2008 Bentley Arnage on new tires?
Before driving a 2008 Bentley Arnage on new tires, inspect the wheels for damage, confirm the tire size matches the wheel diameter, and check that the tires are seated and inflated properly. It is also wise to look over the suspension and steering components on a car of this size and weight.
A short initial road test should be used to watch for vibration, pulling, rubbing, or any unusual response at parking-lot and road speeds. After that first drive, recheck tire pressure and give the tires a visual inspection so any early fitment or installation issue is caught before extended use.
How should tires on a collector 2008 Bentley Arnage be maintained?
Tires on a collector 2008 Bentley Arnage should be maintained with regular pressure checks, periodic visual inspections, and attention to age as well as tread depth. A low-mile luxury car can still develop cracking, flat spotting, or air-loss issues simply from sitting, even when the tread looks serviceable.
Storage conditions matter just as much as mileage. Keeping the car away from prolonged sunlight, moisture, and ozone sources helps preserve the tires, and moving the vehicle periodically can help avoid long-term set in one spot. Before any longer drive, inspect the sidewalls, tread surface, and overall condition closely.
