About This Audi RS5 B9 Build
We love featuring real builds from real owners. This Blue Audi RS5 B9 sits on a set of 20×10-inch BC Forged RZ21 wheels, and the result speaks for itself.
The owner chose BC Forged for a reason. This brand delivers serious quality and a design language that turns heads at every car meet. We see hundreds of Audi RS5 builds come through WheelFront every month, but this one stands out. The combination of the Blue exterior with the BC Forged RZ21 creates a look that balances aggression with elegance.
Fitment Breakdown: BC Forged RZ21 on the Audi RS5 B9
When I first walked up to this RS5, the stance hit me instantly. Running a 20x10 setup at all four corners changes the entire profile of the B9 chassis. It fills those widened fenders exactly how Audi engineers should have done from the factory.
We spec'd these BC Forged RZ21s with an ET22 offset. That offset pushes the wheel face right out to the edge of the metal. It gives the car an aggressive, planted look without looking like a cartoon.
Clearing those massive front calipers is the biggest hurdle on the RS5 platform. The RZ21 spoke design has plenty of room to clear the factory stoppers easily. We didn't need any spacers to get the clearance we wanted.
The ABT HAS suspension drops the car just enough to kill that unsightly wheel gap. It tightens the handling and makes the tires tuck slightly under the arches. The car sits low, but it stays functional for daily driving.
You have to watch the inner fender liners on the front during full lock. Because we went with a 10-inch width, the tire shoulder gets very close to the plastic lining. Just be mindful of your alignment settings to keep the tires from chewing up the inner arch.
The hub bore fits perfectly on the Audi 66.6mm hub, so there is zero vibration. We hate wobble, and this setup runs smooth as glass at highway speeds. It feels solid, planted, and confident in every corner.
The barrel depth on these 20x10s adds a layer of depth that thin factory wheels just lack. The spokes run all the way to the edge of the rim, making the wheel look larger than it actually is. It is a clean, intentional look that defines the whole project.
What We Recommend for Audi RS5 B9 Owners
If you want to replicate this look, stick to a 20x10 square setup. It keeps the car neutral in the turns and lets you rotate your tires properly. Staggered setups on these AWD platforms often mess with the diff and steering feel.
Aim for an offset between ET20 and ET25 for that flush fitment. Anything higher than ET25 will look sunken, and anything lower will poke too much. Keep it in that sweet spot to maintain the clean, factory-plus aesthetic.
Don't try to squeeze a massive tire width on there if you don't need it. A 275/30/20 tire works best with this 10-inch width. It gives you a tiny bit of protection for the rim edge without looking like a balloon.
Avoid cheap spacers at all costs. If you buy the right offset from the start, you never need to mess with spacers. They only introduce potential failure points and balance issues that you do not want.
Always get a professional four-wheel alignment after you install the wheels. Lowering the car on the ABT kit changes your camber and toe drastically. If you skip this step, you will shred a set of expensive tires in just a few thousand miles.
Style and Build Analysis
The Brushed Clear finish is a masterstroke against that deep blue paint. It catches the sun and creates a metallic pop that dark wheels just cannot match. It looks high-end, sophisticated, and raw all at the same time.
The RZ21 design features a crisp, multi-spoke geometry that suits the modern lines of the B9. It matches the angular nature of the Audi headlights and the front grille. It doesn't look like an aftermarket afterthought; it looks like a design choice from the factory.
Proportions are everything when you modify a car like this. Because the RS5 has such wide, bulging fenders, you need a wheel that carries weight visually. These wheels occupy the space perfectly, grounding the car to the pavement.
I have seen a lot of RS5s, but this one feels cohesive. Many builds go overboard with carbon fiber or aggressive wings that clash with the body. This one relies on the quality of the finish and the perfection of the fitment to stand out.
The Brushed Clear finish feels lighter and more technical than standard silver paint. It shows off the machining lines of the forged aluminum perfectly. When the car moves, the wheels create a beautiful, swirling reflection that draws every eye in the parking lot.
Why We Love This Build
This RS5 is the perfect example of quality over quantity. The blue paint looks deep and liquid, while the Brushed Clear BC Forged wheels act like jewelry for the car. Everywhere we parked, people stopped to take a second look.
We love that the owner kept the body clean and focused on the essentials. The ABT suspension and the 20x10 RZ21 wheels work in perfect harmony to define the car's personality. It is fast, sharp, and looks like it belongs on a mountain pass.
This is the kind of build that makes you want to go for a midnight drive just for the fun of it. It balances daily usability with a high-end, custom look that never goes out of style. You need this setup.
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 RS5 B9
- Vehicle Color: Blue
- Wheel Brand & Model: BC Forged RZ21
- Wheel Size: 20×10
- Offset: ET22
- Wheel Finish: Brushed Clear
- Suspension: ABT HAS
Before You Buy: Fitment Checklist
We talk to Audi RS5 owners every day. These are the questions we hear most before they pull the trigger on new wheels.
Will 20×10-inch wheels fit my Audi RS5? 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 RS5 owners run 20×10-inch wheels every day. The key is choosing the right tire with enough sidewall to absorb road imperfections.
