The 2003 Avanti II came at the end of a long and unusual American specialty-car story, blending the Avanti name with a far more modern performance-oriented chassis and tire package than earlier generations ever used. For buyers looking at this exact car, the tire decision is less about vintage sizing systems and more about matching its staggered 17-inch fitment correctly. The front uses 235/45R17 and the rear uses 255/50R17, both in radial construction. Available choices include blackwall, redline, and raised white letter styles across BFGoodrich, Nitto, and Pro-Trac offerings. Getting the right front-to-rear setup matters just as much as choosing the appearance and driving character you want.
Which Tire Size Is Right for The 2003 Avanti II
The 2003 Avanti II uses two primary tire sizes, and the difference is tied to position on the car rather than separate trim levels. Both sizes are radial tires for 17-inch rims, with 235/45R17 used at the front and 255/50R17 at the rear. The first step is confirming that your Avanti still has the intended staggered wheel and tire arrangement before comparing brands, sidewall styles, or series.
235/45R17 is a modern metric radial size: 235 identifies the nominal section width in millimeters, 45 is the aspect ratio, R designates radial construction, and 17 is the rim diameter in inches. On the 2003 Avanti II, this size is used at the front and reflects the car's contemporary performance-oriented fitment. Available choices in this size come from BFGoodrich and Nitto, with blackwall sidewalls and tire series such as g-Force Sport Comp 2, g-Force Comp 2 AS, and NT555 G2. This is the size to evaluate when restoring proper front-end fitment and steering clearance on a stock-style setup.
255/50R17 is also a modern metric radial size, with a 255-millimeter nominal section width, a 50-series profile, radial construction, and a 17-inch rim diameter. On the 2003 Avanti II, this size is used at the rear, making it an important part of the car's staggered front-to-rear tire arrangement. Choices include Nitto and Pro-Trac products, and sidewall treatments expand beyond blackwall to include redline and raised white letter. This rear size matters for buyers who want to keep the intended stance while selecting a tire that suits either a subtle or more visually expressive presentation.
Sub-model fitment on the 2003 Avanti II is straightforward once the tire position is understood. The covered Base configuration uses one radial size at the front and a different radial size at the rear, so selecting tires begins with confirming which axle you are replacing.
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2003 Avanti II Base Front
The 2003 Avanti II Base Front uses the smaller of the two primary sizes, a 235/45R17 radial on a 17-inch rim. Tire selection here centers on preserving the intended front fitment while comparing blackwall performance-oriented choices from the available brands and series.
The 2003 Avanti II Base Rear uses 255/50R17, giving the car a wider rear tire than the front. That makes rear tire choice especially important when matching stance, maintaining the staggered setup, and deciding between blackwall, redline, or raised white letter appearance.
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 2003 Avanti II Tires for Sale
Available 2003 Avanti II tires center on the staggered 235/45R17 front and 255/50R17 rear setup, with BFGoodrich, Nitto, and Pro-Trac options. Buyers can compare blackwall, redline, and raised white letter styles, along with differences in tire series and rim-width compatibility.
These FAQs focus on the staggered tire setup used on the 2003 Avanti II, including front and rear sizing, 17-inch rim fitment, product-selection differences, appearance choices, and the checks worth making before road use.
Tire Size & Fitment
What tire size fits a 2003 Avanti II?
The 2003 Avanti II uses a staggered radial tire setup with 235/45R17 at the front and 255/50R17 at the rear. Both sizes mount on 17-inch rims, but they are not the same size front to rear, so the car should not be treated like a single-size application.
That means the first step is confirming whether you are replacing front tires, rear tires, or the full set. It is also smart to verify that the car still has its intended wheel arrangement, because aftermarket wheel changes or prior tire substitutions can affect what belongs on each axle.
What size rim does a 2003 Avanti II use?
The 2003 Avanti II uses 17-inch rims with both of its primary tire sizes. The front 235/45R17 and rear 255/50R17 share the same rim diameter even though the rear tire is wider and carries a taller profile than the front.
Rim diameter is only part of the fitment picture, so wheel width still matters when selecting replacement tires. Before mounting anything new, check the actual wheel dimensions on the car and compare them with the tire's approved rim-width range, especially if the Avanti has been modified or re-wheeled.
Why does the 2003 Avanti II have more than one tire size?
The 2003 Avanti II uses more than one tire size because it has a staggered setup, with one size at the front and a different size at the rear. In this application, 235/45R17 is used on the front axle and 255/50R17 is used on the rear axle.
For the buyer, that changes the selection process. Instead of choosing one size for the whole car, tire replacement has to respect axle position and the wheel setup already in place. Matching the intended front and rear sizes helps preserve the car's stance, appearance, and basic fitment relationship.
Choosing the Right Tire
What should I consider when choosing a 235/45R17 or 255/50R17 tire for a 2003 Avanti II?
Start with the correct axle position, because the 2003 Avanti II uses 235/45R17 in front and 255/50R17 in the rear. After size, compare radial construction details such as rim-width compatibility, tire series, sidewall style, weight, and any stated load figure that applies to the specific product.
The best choice depends on how the car is used and how closely you want to retain its existing presentation. A buyer replacing a pair should also make sure the remaining tires on the opposite axle still complement the setup in age, wear, and overall character.
What sidewall styles are available for 2003 Avanti II tires?
Sidewall styling varies by size on the 2003 Avanti II. The available 235/45R17 front tires are blackwall, while the 255/50R17 rear choices include blackwall, redline, and RWL, which is raised white letter.
That makes sidewall selection part of the car's visual personality, especially at the rear where more appearance variation exists. Owners trying to keep a restrained modern look may lean toward blackwall, while redline or raised white letter options create a more deliberate performance or custom-oriented presentation.
What brands offer tires for the 2003 Avanti II?
Tires for the 2003 Avanti II are available from BFGoodrich, Nitto, and Pro-Trac. BFGoodrich and Nitto appear in the 235/45R17 front size, while Nitto and Pro-Trac appear in the 255/50R17 rear size.
Brand is only one part of the decision, since each size also varies by tire series and sidewall treatment. It helps to narrow the choice by axle position first, then compare the available products within that size for the look and specifications that best suit the car.
Restoration & Appearance
Which tire should I choose for a period-style 2003 Avanti II?
A period-style 2003 Avanti II still begins with the correct staggered radial sizes: 235/45R17 in front and 255/50R17 in the rear. From there, the visual direction comes from the product line and sidewall treatment, with blackwall offering the most understated look and redline or raised white letter creating a more assertive presentation at the rear.
Because this is a specialty car from a modern era, appearance goals can vary widely between stock-looking examples and personalized builds. Keeping the front and rear size relationship intact usually matters more than chasing one specific cosmetic treatment unless the car is being restored to a documented historical configuration.
How does tire construction affect the appearance of a restored 2003 Avanti II?
On the 2003 Avanti II, the primary fitment is already radial, so construction choice does not create the same visual shift seen on older bias-ply-era vehicles. The bigger appearance difference comes from sidewall style and tire series, especially on the 255/50R17 rear size where blackwall, redline, and raised white letter options are available.
For a restoration-oriented owner, that means the tire's profile and sidewall treatment deserve close attention. Even when the size is correct, the visual effect can move the car toward a restrained modern look or a more performance-themed presentation, so choose with the finished stance and trim details in mind.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2003 Avanti II?
Yes, modifications can affect tire fitment on a 2003 Avanti II even when the tire sizes sound correct. The car's original pattern uses 235/45R17 front and 255/50R17 rear, but wheel-width changes, altered offsets, suspension work, or body modifications can change how those sizes sit and clear.
A car with aftermarket wheels should be checked carefully before replacement tires are chosen. Pay attention to wheel dimensions, steering clearance at the front, and room around the rear wheel openings, especially if the suspension height has been changed or the current tires differ from the intended staggered setup.
What should I inspect before driving a 2003 Avanti II on new tires?
Before driving a 2003 Avanti II on new tires, inspect the wheels, valve stems, lug hardware, and the basic condition of the suspension and steering components. It also helps to confirm that the front and rear tires are mounted in the proper positions, since this car uses different sizes on each axle.
After installation, check inflation pressure, look for any sign of rubbing, and recheck the car after the first short drive. A collector or low-use car deserves extra attention because long storage can hide issues such as dry seals, alignment drift, or wheel damage that only becomes obvious once fresh tires are fitted.
How should 235/45R17 and 255/50R17 tires on a collector 2003 Avanti II be maintained?
Collector-car tires on a 2003 Avanti II should be inspected regularly for air loss, sidewall cracking, bulges, cuts, and uneven tread wear. Because the car uses a staggered setup, the front 235/45R17 and rear 255/50R17 tires should be monitored by axle position rather than treated as interchangeable service items.
Storage conditions matter just as much as mileage on a low-use car. Keeping the Avanti away from prolonged sunlight, excess heat, moisture, and ozone sources helps preserve the tires, and a quick condition check before each drive is wise when the car spends extended periods parked between outings.
