The 2017 BMW 340i GT xDrive blends BMW sport sedan performance with the added space and hatchback practicality of the Gran Turismo body style. Its all-wheel-drive layout and staggered tire arrangement make fitment more specific than a simple one-size replacement search. This model uses radial tires in four primary sizes: 225/50R18 and 255/45R18 on 18-inch wheels, or 225/45R19 and 255/40R19 on 19-inch wheels. Available choices include blackwall performance tires as well as RWL and redline options in the rear sizes. The key is confirming whether the car is on its 18-inch or 19-inch wheel package before comparing tread style, series, and overall appearance.
Which Tire Size Is Right for The 2017 BMW 340i GT xDrive
The 2017 BMW 340i GT xDrive uses four primary tire sizes, and the right choice depends first on wheel diameter and front-versus-rear position. This is a radial-only fitment with either an 18-inch staggered setup or a 19-inch staggered setup, so the first step is confirming which wheel package is on the car. Once that is settled, the decision shifts to brand, tire series, sidewall treatment, and rim-width compatibility within the correct size.
225/45R19 is a metric radial size in which 225 represents nominal section width in millimeters, 45 is the aspect ratio, R identifies radial construction, and 19 is the rim diameter in inches. On the 2017 BMW 340i GT xDrive, this size serves the front position on the 19-inch setup, making it part of a staggered fitment rather than a universal four-corner size. Available choices center on BFGoodrich g-Force series tires in blackwall form, including Comp 2 AS, Sport Comp 2, and Phenom T/A. It is the right size to evaluate when the car has 19-inch front wheels and the owner wants to compare performance-oriented radial options within that package.
225/50R18 is a metric radial size with a 225-millimeter nominal width, a 50-series profile, and an 18-inch rim diameter. For the 2017 BMW 340i GT xDrive, it is the front tire size used with the 18-inch staggered arrangement, so it should be matched to the corresponding rear size rather than treated as a stand-alone fitment. Product choices include BFGoodrich blackwall tires across the g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A lines. This size matters when the car is equipped with 18-inch front wheels and the goal is to stay with the proper front fitment while comparing series and specification differences.
255/40R19 is a metric radial size where 255 indicates nominal section width in millimeters, 40 is the aspect ratio, and 19 is the wheel diameter. On the 2017 BMW 340i GT xDrive, this is the rear tire size for the 19-inch staggered setup, giving the rear axle a wider fitment than the front. Available choices include BFGoodrich g-Force series blackwalls plus Pro-Trac Street Pro III options in RWL and redline sidewall treatments. This is the rear size to review when the car runs 19-inch wheels and the owner wants either a straightforward blackwall performance look or a more distinctive sidewall presentation.
255/45R18 is a metric radial tire size with a 255-millimeter nominal width, a 45-series profile, and an 18-inch rim diameter. For the 2017 BMW 340i GT xDrive, it serves the rear position on the 18-inch staggered setup, so it pairs with a narrower 225/50R18 front tire. Choices in this size span BFGoodrich g-Force models, the Nitto NT555 G2, and Pro-Trac Street Pro III tires with blackwall, RWL, or redline sidewall styling depending on the product. It is the correct rear size to compare when the car has 18-inch wheels and the owner is balancing performance character, appearance, and wheel-width compatibility.
Fitment on the 2017 BMW 340i GT xDrive is straightforward once the wheel package and axle position are identified. The covered sub-model entries separate the front and rear staggered sizes, so checking the exact configuration helps prevent mixing 18-inch and 19-inch fitments.
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2017 BMW 340i GT xDrive Base
The 2017 BMW 340i GT xDrive Base uses the same staggered fitment family as the rest of the covered entries, with one front size and one rear size depending on whether the car has 18-inch or 19-inch wheels. Tire selection starts with confirming the wheel diameter on the car, then matching front and rear sizes within the same package.
The Base Front entry covers the narrower front tire position, with one size for the 18-inch setup and another for the 19-inch setup. That makes front-tire selection mainly a matter of confirming wheel diameter and then choosing among the available radial series that suit the car's intended use.
The Base Rear entry covers the wider rear tire position used in the car's staggered arrangement, again split between 18-inch and 19-inch wheel packages. Rear-tire choice is where sidewall styling becomes more visible, since blackwall, RWL, and redline options appear in the applicable rear sizes.
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 340i GT xDrive Tires for Sale
Available tires for the 2017 BMW 340i GT xDrive span BFGoodrich, Pro-Trac, and Nitto depending on size, with g-Force and Street Pro III series represented. Buyers can compare blackwall performance radials across all sizes, while certain rear sizes also offer RWL and redline sidewall treatments.
Common questions for the 2017 BMW 340i GT xDrive usually center on staggered sizing, 18-inch versus 19-inch wheel fitment, front and rear tire differences, and how to compare available radial tire styles, brands, and sidewall treatments.
Tire Size & Fitment
What tire size fits a 2017 BMW 340i GT xDrive?
The 2017 BMW 340i GT xDrive uses a staggered radial tire setup rather than one uniform size at all four corners. The 18-inch package uses 225/50R18 in front and 255/45R18 in the rear, while the 19-inch package uses 225/45R19 in front and 255/40R19 in the rear.
The most important step is confirming which wheel diameter is actually on the car before choosing tires. Front and rear sizes are different, so replacing only one axle or mixing 18-inch and 19-inch fitments can create avoidable problems with handling balance, wheel compatibility, and overall appearance.
What size rim does a 2017 BMW 340i GT xDrive use?
A 2017 BMW 340i GT xDrive uses either 18-inch or 19-inch rims, depending on the wheel package. The 18-inch setup pairs with 225/50R18 front and 255/45R18 rear tires, while the 19-inch setup pairs with 225/45R19 front and 255/40R19 rear tires.
Rim diameter needs to match the tire size exactly, and this car also uses wider rear tires than front tires. Before ordering replacements, check the wheel markings or current tire sidewalls so the new tires match both the wheel diameter and the front-to-rear staggered arrangement already on the vehicle.
Do all 2017 BMW 340i GT xDrive sub-models use the same tire size?
The covered 2017 BMW 340i GT xDrive sub-model entries share the same overall staggered fitment pattern, but not one single tire size. Front positions use either 225/50R18 or 225/45R19, while rear positions use either 255/45R18 or 255/40R19, depending on the wheel package.
That means sub-model fitment is consistent in layout but still requires a careful check of axle position and wheel diameter. A Base Front entry does not use the same size as a Base Rear entry, so the right replacement depends on whether the tire is going on the front or rear and whether the car has 18-inch or 19-inch wheels.
Choosing the Right Tire
What should I consider when choosing a 2017 BMW 340i GT xDrive tire?
Start with the correct size for the car's wheel package and axle position, since the 2017 BMW 340i GT xDrive uses a staggered setup. After that, compare radial tire series, rim-width compatibility, sidewall style, and any product-specific details such as weight or load capacity where those specifications are available.
A front tire and a rear tire on this BMW do different jobs, so the best choice is usually the one that matches the existing layout and intended use. Owners replacing a full set often compare all-season versus sport-oriented series, while appearance-focused buyers may also pay attention to blackwall, RWL, or redline presentation.
What sidewall styles are available for 2017 BMW 340i GT xDrive tires?
Blackwall is available across all four primary sizes for the 2017 BMW 340i GT xDrive. In the wider rear sizes, 255/40R19 and 255/45R18, there are also RWL and redline sidewall options through the Pro-Trac Street Pro III line.
That gives the car two different visual directions depending on the size and product selected. Blackwall keeps a more understated modern look, while raised white letter or redline treatments add a more customized appearance, so it helps to decide early whether the goal is a subtle factory-inspired presentation or something more expressive.
What brands offer tires for the 2017 BMW 340i GT xDrive?
Tires for the 2017 BMW 340i GT xDrive are available from BFGoodrich across all four fitment sizes, with Pro-Trac appearing in the two wider rear sizes and Nitto available in 255/45R18. Series represented include BFGoodrich g-Force models, Pro-Trac Street Pro III, and the Nitto NT555 G2.
Brand choice is most useful after the correct size has already been confirmed. Some sizes offer only blackwall BFGoodrich options, while certain rear sizes open up more variety in both brand and sidewall treatment, so the range of choices depends on whether the car has 18-inch or 19-inch wheels and which axle is being fitted.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2017 BMW 340i GT xDrive?
Yes, modifications can affect tire fitment on a 2017 BMW 340i GT xDrive even when the tire size itself is correct. Aftermarket wheels, changes in wheel width or offset, suspension lowering, and brake or body modifications can all influence clearance at the fender, strut, or steering components.
A staggered BMW setup leaves less room for guesswork than a square setup, so any change from stock-style wheels deserves a careful check. Measuring the current wheel package and checking full-lock steering and suspension clearance can help prevent rubbing, uneven wear, or interference once the new tires are installed.
What should I inspect before driving a 2017 BMW 340i GT xDrive on new tires?
Before driving on new tires, check that the 2017 BMW 340i GT xDrive has the correct front and rear sizes mounted on the correct wheel diameters. It is also wise to inspect air pressure, valve stems, tread seating, wheel condition, and any visible signs of contact near the fenders or suspension.
A short initial drive followed by a second inspection can catch small issues before they become larger ones. Uneven stance, rubbing noises, vibration, or rapid pressure loss all deserve attention right away, especially on a car with a staggered arrangement where front and rear tires are not interchangeable.
How often should tires on a 2017 BMW 340i GT xDrive be inspected?
Tires on a 2017 BMW 340i GT xDrive should be inspected regularly, not just at replacement time. Frequent visual checks for tread wear, cuts, sidewall damage, uneven shoulder wear, and pressure loss are especially important on staggered setups because front and rear tires often wear differently.
Cars that sit for longer periods still need attention, since age, underinflation, and storage conditions can affect tire condition even when mileage is low. Checking the tires before longer drives, after seasonal storage, and anytime handling feels different is a practical way to catch fitment or condition issues early.
