About This Audi S4 Premium Plus 2018 Build
We love featuring real builds from real owners. This Audi S4 Premium Plus 2018 sits on a set of 20×9 / 20×9-inch Asanti Ab815 wheels, and the result speaks for itself.
The owner chose Asanti for a reason. This brand delivers serious quality and a design language that turns heads at every car meet. We see hundreds of Audi S4 Premium Plus builds come through WheelFront every month, but this one stands out. The combination of the exterior with the Asanti Ab815 creates a look that balances aggression with elegance.
Fitment Breakdown: Asanti Ab815 on the Audi S4 Premium Plus 2018
I walked around this 2018 Audi S4 for twenty minutes just to see how these 20x9 Asanti Ab815 wheels behave. Running a 20-inch diameter on the B9 platform definitely fills the wheel well aggressively. The 35 offset sits right at the edge of the fender without looking like a track car gone wrong. We love how this choice balances the factory body lines with a much bolder stance.
The 9-inch width is a smart move for this specific chassis. It stays flush enough to look custom but avoids the headache of rubbing on the inner fender liner. You get plenty of surface area for grip without sacrificing the daily drive quality. That 35 offset pushes the wheel out just enough to kill that sunken stock look.
I checked the caliper clearance carefully because these stock S4 brakes have some serious meat on them. The spoke design on the Ab815 arcs outward perfectly to clear the face of the factory calipers. You will not need spacers to clear the brakes here. Everything bolts up tight with plenty of room to spare.
The hub bore on these Asantis fits the Audi 66.5mm center perfectly. We always emphasize getting the right hub-centric ring or direct fit to stop those annoying steering wheel vibrations. This setup avoids all that drama. It feels solid and planted at highway speeds.
Looking at the barrel depth, you get a clean, modern profile that complements the S4’s sharp geometry. The spokes reach all the way to the edge of the rim. This visual trick makes the wheel look even larger than a 20-inch spec. It creates a seamless transition from the tire bead to the face of the wheel.
Since this car runs the stock suspension, you have a bit of a gap, but the 20-inch wheel hides it well. If you drop the car later, you will have to watch your fender clearance. For now, the suspension geometry stays within factory specs. You get the look without the alignment nightmares that come with an aggressive slam.
We did notice the rear fitment is tight but safe. You won't scrub your tires on the plastic liner even under heavy compression. It is a precise fitment that respects the engineering Audi put into the B9 platform. This is a textbook example of doing 20s the right way on a German sports sedan.
What We Recommend for Audi S4 Premium Plus 2018 Owners
If you own a B9 S4, stick to a square setup like this one. Staggering wheels on an AWD Audi can mess with your Quattro system and cause major drivetrain headaches. Square setups also let you rotate your tires to keep them even. It is the smarter choice for a daily driver that you actually enjoy pushing.
Aim for an offset between 30 and 35 for that perfect flush look. Anything lower than 30 and you risk hitting the fender lip on bumps. Anything higher than 40 and your wheels will disappear into the wheel wells. 35 is truly the sweet spot for these fenders.
Do not go too crazy with tire stretch. Stick to a 255 or 265 width tire to keep enough sidewall for comfort and rim protection. We see too many guys running undersized tires that leave the rim lip exposed to every pothole in the city. Protect your investment with a tire that fits the rim width properly.
Avoid cheap hub spacers if you can help it. If you choose a wheel that requires a spacer, make sure it is a high-quality, hub-centric unit. Never compromise on your wheel hardware. A wheel flying off at sixty miles per hour is not worth the look.
Think about your alignment after you mount your new wheels. Even a slight change in diameter or offset can shift your scrub radius. A quick alignment check ensures your tires last longer and the car tracks straight. Small details like this separate the amateurs from the pros.
Style and Build Analysis
The Black finish on these Asanti Ab815 wheels transforms the personality of this S4. The stock silver wheels often look a bit muted against the complex curves of the B9 body. This deep, glossy black adds a level of aggression that makes the car look significantly more menacing. It pulls the whole aesthetic together into a cohesive, dark theme.
The spoke design is busy but focused. It has enough geometry to catch the light while you are moving, but it stays dark when parked. The contrast against the paint is striking, especially under streetlights. It looks purposeful rather than just slapped on for attention.
We often see people overdo it with chrome or wild colors, but this is tasteful. The black wheels let the S4’s body lines do the talking. It reminds me of the stealthy builds we see at the biggest European car shows. You get the road presence of a custom car without shouting about it.
The proportions feel right because the wheel design does not dominate the car. It frames the brakes and the tires rather than acting as a separate accessory. We have featured a lot of Audis, but this one nails the balance of form and function. It looks like something that could have rolled out of the factory with a specialized performance package.
Everything feels intentional here. The dark finish draws your eye immediately to the wheel wells, framing the car's stance perfectly. It gives the S4 a low-slung, planted look that makes it feel like it is gripping the pavement. This build proves that less is often more when you choose the right design.
Why We Love This Build
This Audi S4 looks ready for business. The way the Black Asanti wheels disappear into the dark rubber while highlighting the S4's sharp lines is pure class. We love how the 20-inch sizing fills the arches, eliminating that empty space that plagues stock cars. It makes the car look hunkered down and hungry for the next corner.
When the sun hits the finish, the wheels reveal their true detail, adding depth to the entire side profile. It is a build that commands respect without trying too hard. You walk past it, and you have to double-check the stance. It is clean, effective, and perfectly executed for a modern street build. This is how you upgrade an S4 properly.
Full Specs Breakdown
Here is exactly what this owner is running. We break down every detail so you can replicate this build or use it as a starting point for your own setup.
- Car Make & Model: Audi S4 Premium Plus 2018
- Vehicle Color:
- Wheel Brand & Model: Asanti Ab815
- Wheel Size: 20×9 / 20×9
- Offset: 35 / 35
- Wheel Finish: Black
- Tires: Continental Dws06 265/35 27.3″x10.4″ / 265/35 27.3″x10.4″
- Suspension: Stock
Before You Buy: Fitment Checklist
We talk to Audi S4 Premium Plus owners every day. These are the questions we hear most before they pull the trigger on new wheels.
Will 20×9 / 20×9-inch wheels fit my Audi S4 Premium Plus? Yes, but fitment depends on width, offset, and tire size working together. A wrong offset means rubbing. A wrong tire size means poor handling. Always verify all three.
Do I need to modify my fenders? That depends on your offset and suspension. A conservative offset with stock ride height usually fits without modification. Go aggressive and you may need to roll or pull your fenders.
Can I daily-drive this setup? Absolutely. Thousands of Audi S4 Premium Plus owners run 20×9 / 20×9-inch wheels every day. The key is choosing the right tire with enough sidewall to absorb road imperfections.
