The 2008 BMW 135i arrived as a compact rear-wheel-drive performance car with the short-wheelbase feel and turbocharged character that made the 1 Series especially appealing to drivers who wanted modern BMW dynamics in a smaller package. Tire fitment matters here because this model uses all-radial sizing, with a standard 205/50R17 setup and an 18-inch staggered sport-package arrangement of 215/40R18 front and 245/35R18 rear. That creates a real choice between standard and staggered fitment, along with differences in available brands, tire series, and sidewall presentation. The right selection starts with confirming the exact wheel setup on the car before comparing appearance, handling priorities, and overall road use.
Which Tire Size Is Right for The 2008 BMW 135i
The 2008 BMW 135i uses three primary tire sizes, and the correct one depends on whether the car has the standard 17-inch setup or the staggered 18-inch sport-package arrangement. Before choosing a tire, confirm both the exact sub-model and the wheel diameter on the car, since fitment changes between standard coupe and convertible applications and the front-to-rear sport-package sizes are not interchangeable.
205/50R17 is a metric radial size in which 205 identifies the nominal section width in millimeters, 50 is the aspect ratio, R designates radial construction, and 17 is the wheel diameter in inches. On the 2008 BMW 135i, this size serves the standard 17-inch wheel setup used on the coupe and convertible. Available choices include BFGoodrich, American Classic, and Vredestein, with blackwall options as well as a wide whitewall variation for a more distinctive look. This size is the right starting point when the car retains its non-sport 17-inch wheel arrangement.
Fit(s): Convertible w/Sport Pkg. Front and Coupe Front
Construction: Radial|Rim: 18 in
215/40R18 is a metric radial size with a 215-millimeter nominal section width, a 40-series profile, and fitment for an 18-inch rim. On the 2008 BMW 135i, this is the front tire size used with the staggered 18-inch sport-package setup rather than the standard square arrangement. The available product in this size is a BFGoodrich g-Force Sport Comp 2 blackwall radial, giving the front position a clearly performance-oriented option. This size should be evaluated only after confirming that the car has the sport-package front wheel and matching rear staggered fitment.
Fit(s): Convertible w/Sport Pkg. Rear and Coupe Rear
Construction: Radial|Rim: 18 in
245/35R18 is a metric radial size where 245 denotes the nominal section width in millimeters, 35 is the aspect ratio, and 18 is the required wheel diameter in inches. On the 2008 BMW 135i, this size is used at the rear of the staggered 18-inch setup, pairing with 215/40R18 fronts. The available choice here is a BFGoodrich g-Force Phenom T/A blackwall radial, which reflects the wider rear fitment used to support the car's sport-oriented layout. This size belongs in the conversation only when the car is running the correct 18-inch rear wheel configuration.
Sub-model fitment on the 2008 BMW 135i is not one-size-fits-all, because standard coupe and convertible versions use a 17-inch tire while the sport-package configuration moves to a staggered 18-inch front and rear setup. Checking the exact sub-model and wheel position is the key first step before comparing tires.
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2008 BMW 135i Convertible
The 2008 BMW 135i Convertible uses the standard 17-inch radial fitment rather than the staggered sport-package arrangement. Tire selection here centers on choosing the right 205/50R17 option, whether the priority is a conventional blackwall performance look or a more distinctive whitewall presentation.
The sport-package convertible uses a dedicated 18-inch front tire size, separate from the rear. That means the front tires should be chosen as part of a staggered setup, with attention to matching the wheel diameter and preserving the intended front-to-rear sizing relationship.
The sport-package convertible rear fitment uses a wider 18-inch radial size than the front. Tire selection should focus on the correct rear application, since this position is part of a staggered arrangement and should be checked against the actual rear wheel width on the car.
The 2008 BMW 135i Coupe uses the same standard 17-inch radial size as the non-sport convertible. That keeps tire choice straightforward, with the real decision shifting to brand, series, sidewall style, and how the car is driven and presented.
The 2008 BMW 135i Coupe front sport-package fitment uses the narrower of the two 18-inch staggered sizes. Choosing the correct front tire means confirming that the coupe has the staggered wheel setup and avoiding any assumption that the rear size belongs on all four corners.
The 2008 BMW 135i Coupe rear sport-package fitment uses the wider 18-inch tire size in the staggered arrangement. Tire choice at this position should account for rear wheel compatibility and maintain the intended relationship between the front and rear sizes already on the car.
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 135i Tires for Sale
Available 2008 BMW 135i tires are all radial, with the broadest selection in 205/50R17 from BFGoodrich, American Classic, and Vredestein. Buyers can compare blackwall and wide whitewall styles, along with series such as g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, Sprint Plus, and American Classic Radial.
These 2008 BMW 135i tire FAQs focus on the main fitment questions owners run into: standard versus staggered sizing, 17-inch versus 18-inch wheels, product selection, appearance choices, and the inspections worth making before regular road use.
Tire Size & Fitment
What tire size fits a 2008 BMW 135i?
The 2008 BMW 135i uses 205/50R17 in standard coupe and convertible form. Sport-package cars use a staggered 18-inch setup with 215/40R18 at the front and 245/35R18 at the rear, so the correct size depends on the exact configuration and wheel position.
The first thing to verify is whether the car has 17-inch standard wheels or 18-inch sport-package wheels. A 205/50R17 setup is a square arrangement, while the 18-inch sport setup uses different front and rear sizes, so checking the actual wheels on the car prevents ordering a tire that belongs to another position.
What size rim does a 2008 BMW 135i use?
The 2008 BMW 135i uses either a 17-inch or 18-inch rim, depending on the setup. The standard 205/50R17 tire fits a 17-inch wheel, while the sport-package 215/40R18 front and 245/35R18 rear sizes both fit 18-inch wheels.
Wheel diameter should be confirmed before comparing tires, especially on cars that may have had wheel changes over time. A 17-inch tire cannot be mounted on an 18-inch wheel, and the staggered 18-inch arrangement also adds a front-to-rear width difference that matters when matching the correct tire to the correct wheel.
Why does the 2008 BMW 135i have more than one tire size?
More than one tire size appears because the 2008 BMW 135i was offered in both a standard 17-inch configuration and a staggered 18-inch sport-package configuration. In the staggered setup, the front and rear tires are intentionally different sizes, which is why both 215/40R18 and 245/35R18 apply.
That means tire selection is tied to the exact wheel package on the car, not just the model name. Owners should check whether the car is a standard coupe or convertible setup or an 18-inch front-and-rear staggered setup, then match each tire to its wheel position before comparing brands or tire series.
Choosing the Right Tire
What should I consider when choosing a 205/50R17 tire for a 2008 BMW 135i?
For a 2008 BMW 135i running 205/50R17, start with the correct size and radial construction, then compare the tire's intended character. In this size, choices include BFGoodrich, American Classic, and Vredestein, with differences in tire series, sidewall style, rim-width specifications, weight, and load details.
The right choice depends on how the car is used and how it should look. A blackwall performance-style tire suits a modern presentation, while a wide whitewall creates a very different appearance, so owners should balance wheel compatibility, visual preference, and the way the car will actually be driven.
What sidewall styles are available for 2008 BMW 135i tires?
Sidewall style depends on the tire size chosen for the 2008 BMW 135i. In 205/50R17, both blackwall and wide whitewall options are available, while the 18-inch sport-package sizes shown here are offered in blackwall form.
That makes sidewall appearance a more significant decision on standard 17-inch cars than on the staggered 18-inch sport setup. Owners focused on preserving a contemporary performance look may lean toward blackwalls, while someone building a more customized or distinctive presentation may want to consider the whitewall option in the 17-inch size.
What brands offer tires for the 2008 BMW 135i?
The 2008 BMW 135i tire selection here includes BFGoodrich, American Classic, and Vredestein. Brand availability varies by size, with the widest mix appearing in 205/50R17, while the two 18-inch sport-package sizes each show a more focused selection.
Brand choice should be evaluated alongside size, sidewall style, tire series, and wheel compatibility rather than in isolation. A buyer comparing 205/50R17 options has more room to weigh appearance and specification differences, while sport-package owners may be choosing from a narrower set tied closely to front or rear fitment.
Restoration & Appearance
Which tire should I choose for a period-style 2008 BMW 135i?
A period-style 2008 BMW 135i tire choice starts with keeping the correct original fitment type for the car's actual wheel setup, either 205/50R17 on standard models or the staggered 18-inch combination on sport-package cars. From there, the visual direction depends on whether the goal is understated modern performance or something more customized.
Among the available options, blackwall tires preserve the most familiar late-2000s performance appearance, while the 205/50R17 wide whitewall creates a deliberately different look. Owners who want strict originality should verify the car's original wheel-and-tire presentation through BMW-specific reference material before choosing a sidewall treatment based mainly on style.
Does correct tire fitment matter for a 2008 BMW 135i restoration?
Correct tire fitment matters on a 2008 BMW 135i restoration because wheel diameter and front-to-rear sizing are part of the car's visual stance as well as its road manners. A standard 17-inch setup presents differently from the staggered 18-inch sport arrangement, and mixing those layouts can change the car's overall appearance.
A restoration-minded buyer should confirm whether the car is being returned to a standard or sport-package presentation before selecting tires. Once that is settled, the remaining choices are mostly about sidewall style, tire series, and brand, rather than trying to force a size from one configuration onto another.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2008 BMW 135i?
Yes, modifications can affect tire fitment on a 2008 BMW 135i. Aftermarket wheels, altered wheel widths, offset changes, suspension lowering, or body modifications can all change whether the standard 205/50R17 setup or the staggered 215/40R18 and 245/35R18 arrangement still has proper clearance.
Any modified car should be checked at the wheel, fender, and steering range before a replacement tire is chosen. Even when the tire size itself is correct for a factory-style setup, changes to the wheel or suspension can create rubbing or clearance issues that would not be present on an unmodified car.
What should I inspect before driving a 2008 BMW 135i on new tires?
Before driving a 2008 BMW 135i on new tires, inspect wheel condition, confirm the correct tire size at each position, and check inflation pressure carefully. It also makes sense to look for any obvious clearance issue at the strut, fender liner, and outer fender, especially on cars with the staggered 18-inch setup.
A short test drive should be followed by another visual check for rubbing, uneven seating, or unexpected air loss. On a car that sees limited mileage, it is also smart to inspect the rest of the chassis for worn suspension parts or alignment issues that could shorten tire life even when the tires themselves are new.
How should tires on a 2008 BMW 135i be maintained?
Tires on a 2008 BMW 135i should be maintained with regular pressure checks, routine visual inspection, and attention to tread wear across the full width of the tire. Owners should also watch for sidewall cracking, bulges, cuts, or gradual air loss, especially on cars that are driven infrequently.
Storage conditions matter on a low-use performance car. Keeping the vehicle away from prolonged sunlight, heat, moisture, and ozone sources can help preserve tire condition, and a car with staggered sizing should always be checked by position so the front and rear tires are evaluated against the correct size and wear pattern.
