The 2004 Avanti II carries one of the most distinctive names in low-volume American grand touring, blending hand-built exclusivity with modernized running gear that separates it from earlier Studebaker-rooted Avantis. For tire selection, that matters because this car uses a staggered radial setup rather than one all-around vintage size. The front uses 235/45R17 and the rear uses 255/50R17, both on 17-inch wheels. Available choices range from blackwall sport radials to redline and raised white letter rear options, giving the car either a contemporary or more nostalgic look. The key is matching the correct front and rear sizes first, then choosing the appearance and tire series that suit the car's intended use.
Which Tire Size Is Right for The 2004 Avanti II
The 2004 Avanti II uses two primary tire sizes, and the difference is tied to position rather than unrelated trim levels. Both are radial tires for 17-inch wheels, with 235/45R17 used at the front and 255/50R17 used at the rear. The first step is confirming which axle you are replacing, then comparing tire series, sidewall style, and wheel-width compatibility within the correct size.
235/45R17 is a modern metric radial size in which 235 is the section width in millimeters, 45 is the aspect ratio, R identifies radial construction, and 17 is the wheel diameter in inches. On the 2004 Avanti II, this size is used at the front, so steering response, clearance, and wheel-width compatibility all matter when choosing among replacements. Available options in this size come from BFGoodrich and Nitto, all in blackwall form, with tire series including g-Force Sport Comp 2, g-Force Comp 2 AS, and NT555 G2. This is the size to evaluate when refreshing the front axle without changing the car's staggered tire layout.
255/50R17 is also a modern metric radial size, with a wider 255-millimeter section width, a 50-series profile, radial construction, and a 17-inch rim diameter. On the 2004 Avanti II, this size belongs at the rear, giving it a distinct role from the front tire rather than functioning as an all-around fitment. Rear-tire choices include a blackwall Nitto NT555 G2 as well as Pro-Trac Street Pro III options in redline and raised white letter form. This size is the one to review when maintaining the car's rear stance and selecting a sidewall look that matches the build style.
Sub-model fitment on the 2004 Avanti II is straightforward, but position still matters because the front and rear do not use the same tire size. Checking whether you are replacing a front or rear tire is the important step before comparing products.
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2004 Avanti II Base Front
The 2004 Avanti II Base Front uses a 235/45R17 radial tire on a 17-inch wheel. That keeps the buying decision focused on front-axle replacement, including wheel-width compatibility and selection among the available blackwall performance-oriented tire series.
The 2004 Avanti II Base Rear uses a 255/50R17 radial tire on a 17-inch wheel. Rear-tire selection is where sidewall presentation becomes more varied, with blackwall, redline, and raised white letter options available depending on the look you want.
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 2004 Avanti II Tires for Sale
Available 2004 Avanti II tires center on two 17-inch radial sizes, with BFGoodrich, Nitto, and Pro-Trac options across sport-oriented tire series. The most visible product differences are front-versus-rear sizing and rear sidewall treatments, including blackwall, redline, and raised white letter styles.
Common 2004 Avanti II tire questions usually come down to the staggered front-and-rear sizing, 17-inch wheel fitment, choosing among radial product lines, and deciding which sidewall style best suits the car's appearance and road use.
Tire Size & Fitment
What tire size fits a 2004 Avanti II?
The 2004 Avanti II uses a staggered tire setup, with 235/45R17 on the front and 255/50R17 on the rear. Both are radial tires mounted on 17-inch wheels, so the car does not use one uniform size at all four corners.
That means the first thing to confirm is which axle needs replacement. Mixing up the front and rear sizes can affect appearance, clearance, and overall setup, so the tire choice should begin with the correct position and then move to brand, series, sidewall style, and wheel-width compatibility within that exact size.
What size rim does a 2004 Avanti II use?
The 2004 Avanti II uses 17-inch rims with both of its primary tire sizes. The front 235/45R17 and rear 255/50R17 are both built around that 17-inch wheel diameter, even though the tires differ in width and profile.
Wheel diameter is only part of the fitment picture, so it is still important to verify actual wheel width before choosing a specific tire. The available products in these sizes do not all share the same rim-width specifications, and that matters when replacing tires on original wheels or on a car that may have aftermarket wheel changes.
Why does the 2004 Avanti II have more than one tire size?
The 2004 Avanti II has more than one tire size because it uses a front-and-rear staggered layout. The front position takes 235/45R17, while the rear uses the wider 255/50R17, so the size difference is built into the car's axle-specific fitment.
For the owner, that means tire buying is less about choosing between two interchangeable sizes and more about matching the correct size to the correct end of the car. It also helps explain why the available product choices are different front to rear, especially when comparing sidewall styles and tire series for appearance or road use.
Choosing the Right Tire
What should I consider when choosing tires for a 2004 Avanti II?
Start with the staggered layout: 235/45R17 for the front and 255/50R17 for the rear, both on 17-inch wheels. After that, the main considerations are tire series, wheel-width compatibility, sidewall style, and whether the car is being kept more contemporary in appearance or given a more nostalgic presentation.
Front choices are blackwall sport radials, while the rear size adds visual options such as redline and raised white letter. It also helps to compare practical details like maximum load figures where available, tire weight, and whether the tire's overall character matches the way the Avanti II is driven and maintained.
What sidewall styles are available for 2004 Avanti II tires?
Sidewall style varies by size on the 2004 Avanti II. The 235/45R17 front options are blackwall, while the 255/50R17 rear size is available in blackwall, redline, and RWL, which is a raised white letter treatment.
That makes sidewall choice part of the car's visual balance, especially at the rear. A blackwall setup keeps the look more understated and modern, while redline or raised white letters can push the car toward a more muscle-era or custom-inspired appearance without changing the required rear tire size.
What brands offer tires for the 2004 Avanti II?
Tires for the 2004 Avanti II are available from BFGoodrich, Nitto, and Pro-Trac, depending on the size and axle position. BFGoodrich and Nitto appear in the 235/45R17 front size, while Nitto and Pro-Trac are offered in the 255/50R17 rear size.
Brand choice should be considered alongside the specific tire series and sidewall treatment rather than as a standalone decision. Since the front and rear sizes do not share the same product mix, many owners will compare brands differently at each axle while still keeping the proper staggered fitment intact.
Restoration & Appearance
Which tire should I choose for a period-style 2004 Avanti II?
A period-style approach to a 2004 Avanti II usually starts by preserving its correct staggered sizing, with 235/45R17 in front and 255/50R17 in the rear. From there, the choice becomes more about sidewall presentation and tire series than about moving to an older sizing convention.
The rear offers the strongest appearance choices, since 255/50R17 is available in blackwall, redline, and raised white letter form. Buyers aiming for a historically grounded presentation should compare those visual cues against the car's individual build history, photos, and marque references rather than assuming any one sidewall treatment is exact.
How does tire construction affect the appearance of a restored 2004 Avanti II?
On the 2004 Avanti II, construction does not create a bias-ply-versus-radial decision because the primary fitment is radial. The appearance difference comes more from profile, sidewall treatment, and tire series than from changing the basic construction type.
That keeps the visual decision centered on whether the car looks best with understated blackwalls or a stronger rear-sidewall statement such as redline or raised white letters. For a restoration-minded owner, maintaining the proper front-and-rear size relationship is just as important to the finished look as the sidewall styling itself.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2004 Avanti II?
Yes, modifications can affect tire fitment on a 2004 Avanti II even when the tire sizes remain 235/45R17 in front and 255/50R17 in the rear. Changes to wheel width, wheel offset, suspension height, alignment settings, or body clearance can all alter how those sizes sit and function on the car.
That is especially important on a staggered setup, since front and rear tires already differ in width and profile. A car with aftermarket wheels or suspension changes should have both axle positions checked for clearance at full steering lock and full suspension movement before settling on a replacement tire.
What should I inspect before driving a 2004 Avanti II on new tires?
Before driving a 2004 Avanti II on new tires, inspect wheel condition, valve stems, lug hardware, and inflation pressure, then confirm that the front 235/45R17 and rear 255/50R17 tires are mounted in the correct positions. It is also smart to look over suspension and steering components for obvious wear.
A short test drive should include attention to rubbing, vibration, pull, and any unusual change in steering feel. Collector and specialty cars can sit for long periods, so it also helps to recheck pressure, look for air loss, and confirm that nothing in the wheel wells contacts the tires under normal driving.
How often should tires on a 2004 Avanti II be inspected?
Tires on a 2004 Avanti II should be inspected regularly, especially if the car is driven infrequently or stored for long stretches. Pressure, tread wear, sidewall condition, and any signs of cracking, bulges, cuts, or uneven wear deserve routine attention on both the front and rear sizes.
A staggered setup makes it important to check each axle as its own fitment rather than assuming wear patterns will match. Owners should also inspect the tires before longer drives, after storage, and any time the car develops vibration, pull, or visible clearance issues around the 17-inch wheel and tire package.
