The 2008 BMW 650i sits in the E63 and E64 6 Series range as a grand touring BMW built for strong V8 power, long-legged highway driving, and a balance of luxury with sharp road manners. That character makes tire selection more than a basic replacement decision, because wheel setup changes the fitment story. A 2008 BMW 650i uses radial tires in three fitment sizes: 245/45R18 for standard 18-inch applications, or a staggered 19-inch setup with 245/40R19 front and 275/35R19 rear. Available choices center on blackwall performance-oriented radial lines from BFGoodrich and Nitto, so the right pick comes down to confirming wheel diameter, front-to-rear sizing, and how the car is actually equipped today.
Which Tire Size Is Right for The 2008 BMW 650i
Three tire sizes apply to the 2008 BMW 650i, and the first step is confirming whether the car has 18-inch wheels or the staggered 19-inch front-and-rear setup. Standard 18-inch fitment uses one size at all four corners, while the 19-inch arrangement splits front and rear sizes. Once the wheel diameter and axle position are confirmed, the decision becomes choosing among the available radial performance tires in the correct size.
245/45R18 is a modern metric radial size in which 245 is the nominal section width in millimeters, 45 is the aspect ratio, R indicates radial construction, and 18 is the wheel diameter in inches. On the 2008 BMW 650i, this size serves the 18-inch fitment and keeps the car on a square setup rather than a staggered front-and-rear combination. Available choices include BFGoodrich and Nitto blackwall tires across series such as g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2. This size is the right one to evaluate when the car is equipped with 18-inch wheels and uses the same tire size at all four corners.
245/40R19 is a metric radial size with a 245-millimeter nominal section width, a 40-series profile, radial construction, and a 19-inch rim diameter. On the 2008 BMW 650i, this size belongs to the front position when the car is equipped with the staggered 19-inch wheel package. Product choices in this size center on BFGoodrich blackwall performance radials, including the g-Force Sport Comp 2, g-Force Comp 2 AS, and g-Force Phenom T/A series. This is the size to confirm when replacing only the front tires on a 19-inch setup or when matching an existing staggered wheel arrangement.
275/35R19 is a wider metric radial size, with 275 as the nominal section width in millimeters, 35 as the aspect ratio, R for radial construction, and 19 for the wheel diameter. On the 2008 BMW 650i, this size is used at the rear on the staggered 19-inch setup, giving the rear axle a different tire than the front. Available blackwall options include BFGoodrich g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and Nitto NT555 G2. This size should be evaluated specifically for rear replacement on a 19-inch car, with attention to wheel width and matching the existing front-and-rear arrangement.
Fitment for the 2008 BMW 650i is straightforward once the body style and wheel setup are clear. Coupe and Convertible models can use the same 18-inch square fitment or the same staggered 19-inch front-and-rear arrangement, so the key is identifying whether the tire position is all-around, front, or rear.
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2008 BMW 650i Convertible
The 2008 BMW 650i Convertible uses the 245/45R18 radial size when equipped with the 18-inch wheel setup. Tire selection here centers on choosing the right blackwall performance radial for a square fitment with the same size at all four corners.
The 2008 BMW 650i Convertible Front uses 245/40R19 on cars equipped with the staggered 19-inch setup. That makes front tire selection a matter of matching the correct 19-inch front size rather than treating the car as a four-corner same-size application.
The 2008 BMW 650i Convertible Rear uses 275/35R19 on the staggered 19-inch arrangement. Rear replacement should keep that wider axle-specific fitment in mind so the tire matches the existing wheel setup and front-to-rear sizing strategy.
The 2008 BMW 650i Coupe uses 245/45R18 radial tires when fitted with the 18-inch square setup. That keeps the tire decision focused on brand and series choice within one size rather than sorting through front-and-rear staggered sizing.
The 2008 BMW 650i Coupe Front uses 245/40R19 when the car has the staggered 19-inch wheel package. Front replacement should stay with that axle-specific size and be checked against the actual wheel diameter already on the car.
The 2008 BMW 650i Coupe Rear uses 275/35R19 on the 19-inch staggered setup. That wider rear fitment means tire choice should be based on the rear wheel position and not assumed to match the front size.
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 2008 BMW 650i Tires for Sale
Available 2008 BMW 650i tires focus on radial blackwall performance choices in 245/45R18, 245/40R19, and 275/35R19. BFGoodrich and Nitto options span series such as g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2, with rim-width compatibility varying by size.
These FAQs cover the key tire questions for the 2008 BMW 650i, including size by wheel setup, 18-inch versus staggered 19-inch fitment, available brands and series, and the checks that matter before road use.
Tire Size & Fitment
What tire size fits a 2008 BMW 650i?
The 2008 BMW 650i uses three tire sizes depending on wheel setup. Cars with the 18-inch configuration use 245/45R18. Cars with the staggered 19-inch setup use 245/40R19 on the front and 275/35R19 on the rear. All of these are radial tire sizes.
The most important step is confirming what is actually on the car today, because a 650i can be a same-size 18-inch setup or a front-and-rear staggered 19-inch setup. Check the wheel diameter and whether the front and rear tires match before choosing replacements, especially if the car has changed hands or has aftermarket wheels.
What size rim does a 2008 BMW 650i use?
A 2008 BMW 650i uses either 18-inch or 19-inch rims, depending on the tire size fitted to the car. The 245/45R18 size mounts on an 18-inch rim, while both 245/40R19 and 275/35R19 mount on 19-inch rims.
Rim diameter needs to be confirmed before anything else, because the 18-inch and 19-inch fitments are not the same tire setup. Wheel width matters too when comparing products, since the available tires in these sizes carry different approved rim-width ranges. A quick check of the wheel itself and the existing sidewall marking prevents costly fitment mistakes.
Why does the 2008 BMW 650i have more than one tire size?
The 2008 BMW 650i has more than one tire size because it can be equipped with either a square 18-inch setup or a staggered 19-inch setup. In the 19-inch arrangement, the front uses 245/40R19 and the rear uses the wider 275/35R19, so axle position becomes part of the fitment.
That means tire selection starts with identifying both wheel diameter and where the tire will be used on the car. A front 19-inch tire should not be chosen as though it were a rear tire, and an 18-inch car should not be treated like a staggered setup. Matching the actual wheel package keeps dimensions and wheel compatibility aligned.
Choosing the Right Tire
What should I consider when choosing a 245/45R18 tire for a 2008 BMW 650i?
Start with the basics: 245/45R18 is the correct radial size for 18-inch 2008 BMW 650i applications using the square setup. From there, compare brand, tire series, approved rim-width range, and any load information shown for the specific tire. BFGoodrich and Nitto both appear in this size.
The real choice is less about fitment format and more about how the tire matches the car's current wheels and intended use. Some owners want a consistent grand touring street setup, while others prefer a more performance-oriented series. Check the wheel width already on the car and replace all four consistently if the goal is balanced appearance and handling.
What brands offer tires for the 2008 BMW 650i?
BFGoodrich and Nitto offer tires for the 2008 BMW 650i in the applicable sizes. BFGoodrich appears across all three sizes with several g-Force series choices, while Nitto appears in 245/45R18 and 275/35R19 through the NT555 G2 line.
Brand choice should be considered alongside the exact size and wheel setup, not by name alone. A tire that is available in the 18-inch square fitment may not be available in both sizes needed for the staggered 19-inch arrangement. It also helps to compare rim-width compatibility and any load figures shown for the specific product before making a final selection.
What tire series are available for the 2008 BMW 650i?
Available tire series for the 2008 BMW 650i include BFGoodrich g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and Nitto NT555 G2, depending on size. These series appear across the 245/45R18, 245/40R19, and 275/35R19 fitments with blackwall radial construction.
Series selection matters because it helps narrow the tire to the kind of driving and presentation the car owner wants, while still staying within the correct size. The key is to compare the series only after the wheel diameter and front-or-rear position are confirmed. On a staggered 19-inch car, make sure the chosen series is available in both the front and rear sizes.
Restoration & Appearance
Which tire should I choose for a period-style 2008 BMW 650i?
A period-style 2008 BMW 650i tire choice starts with keeping the correct modern radial size for the wheel setup already on the car. That means 245/45R18 for the 18-inch square fitment, or 245/40R19 front and 275/35R19 rear for the staggered 19-inch arrangement. All available choices here use blackwall radial construction.
Because this is a modern grand touring BMW rather than an earlier collector car with wide visual sidewall variation, the main appearance decision is preserving the original wheel-and-tire stance rather than selecting stripes or whitewalls. Staying with the proper diameter and front-to-rear relationship will usually do more for the car's visual balance than changing to a different fitment format.
Does correct tire fitment matter for a 2008 BMW 650i restoration?
Correct tire fitment matters on a 2008 BMW 650i because the car's stance and overall presentation depend on whether it is using the proper 18-inch square setup or the proper staggered 19-inch setup. Using the wrong diameter or mixing the front and rear 19-inch sizes can change the look of the car immediately.
A restoration-oriented approach should begin with confirming the wheel package actually intended for the car, then choosing the matching tire sizes within that setup. On a newer collector car like this, details such as consistent blackwall appearance, matched axle sizing, and proper wheel compatibility usually matter more than chasing a generic replacement based only on section width.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2008 BMW 650i?
Yes, modifications can affect tire fitment on a 2008 BMW 650i. Aftermarket wheels, changed wheel widths, altered offsets, suspension lowering, or body modifications can all change how a 245/45R18, 245/40R19, or 275/35R19 tire sits in the wheelwell and how much clearance it has in operation.
Even when the tire size itself is correct, the full setup still needs to be checked against the car as it sits today. Look at steering clearance up front, rear fender room, and whether the wheel width matches the tire's approved range. Any modified 650i should be measured rather than assumed to match stock dimensions.
What should I inspect before driving a 2008 BMW 650i on new tires?
Before driving a 2008 BMW 650i on new tires, confirm the tire size matches the wheel position, inspect the wheels for damage, and make sure inflation pressure is set correctly for the tire and vehicle setup. It also helps to check for even mounting, valve-stem condition, and any signs of rubbing at full steering lock.
A careful walkaround after installation can prevent avoidable problems. Recheck that the car is not mixing 18-inch and 19-inch assumptions, and make sure a staggered setup still has the correct front and rear sizes in the correct locations. After the first drive, inspect again for air loss, unusual marks, or any contact with suspension or body components.
How often should tires on a 2008 BMW 650i be inspected?
Tires on a 2008 BMW 650i should be inspected regularly, especially if the car is driven seasonally or stored for long periods. Look for uneven wear, sidewall cracking, bulges, cuts, punctures, and slow air loss. Collector-use cars can show tire aging before they show much tread wear.
A monthly pressure and condition check is a sensible routine, with another inspection before longer drives or after the car has been sitting. Pay close attention to staggered 19-inch cars, since front and rear tires are different sizes and may wear differently. Keeping an eye on age and condition matters just as much as watching tread depth on a low-use grand touring coupe or convertible.
