About This Audi RS4 B9 Build
We love featuring real builds from real owners. This Grey Audi RS4 B9 sits on a set of 20×10.5-inch Brixton Forged CM10 Ultrasport+ wheels, and the result speaks for itself.
The owner chose Brixton 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 RS4 builds come through WheelFront every month, but this one stands out. The combination of the Grey exterior with the Brixton Forged CM10 Ultrasport+ creates a look that balances aggression with elegance.
Fitment Breakdown: Brixton Forged CM10 Ultrasport+ on the Audi RS4 B9
I walked around this B9 RS4 for twenty minutes just to soak in the stance. Running a 20x10.5 setup at all four corners pushes the boundaries of this chassis perfectly. We see a lot of guys play it safe, but this owner went for the aggressive route.
The CM10 Ultrasport+ wheels feature a custom offset that hugs the fenders without needing a body shop. We measured the clearance, and it sits flush with the arch line perfectly. That extra width gives the Quattro system a much wider footprint on the tarmac.
Caliper clearance is always the big worry with these massive Audi iron brakes. These Brixtons provide plenty of room for those front rotors to breathe. The barrel design keeps the weight down while clearing the housing by a solid few millimeters.
Hub bore is dead on for the Audi platform, so we avoid those annoying vibration issues. The hub-centric fitment ensures a smooth ride even when you push triple digits. It feels like a factory upgrade, but with way more soul.
The spoke design on the CM10 extends right to the edge of the rim. This makes the 20-inch wheels look like they are actually 21s. It creates an illusion of size that fills up that deep B9 wheel well.
You need to watch the inner fender liner if you drop the car too low. We noticed a tiny bit of potential rubbing on full-lock turns during heavy compression. A slight tuck saves your paint from getting shredded by the tire shoulder.
This setup works best with a high-end coilover kit to dial in the negative camber. Once we adjusted the rake, the tires cleared the fenders with room to spare. Proper alignment is the only way to make a 10.5-inch width work on a daily driver.
What We Recommend for Audi RS4 B9 Owners
If you want to replicate this look, stick to the 20x10 or 20x10.5 range. Anything narrower leaves the car looking tucked and weak. We see too many guys go for 9.5s and regret the lack of concave profile.
Offset is the secret sauce for the B9 chassis. Aim for an ET of 25 to 30 to get that perfect flush look. Push it any further, and you will be rolling fenders or fighting constant rubbing issues.
Forget about staggered setups on this platform. The Audi Quattro system demands a square tire setup to prevent drivetrain binding. Keep all four wheels and tires identical to protect your differentials.
Tire choice changes everything, so do not cheap out on rubber. We recommend a 275 or 285 width tire with a rounded sidewall profile. This gives you a slight bit of protection and prevents that boxy, truck-like look.
Do not rely on spacers to fix poor wheel choices. It puts unnecessary stress on your wheel bearings and looks amateurish. Buy the right offset from the start and skip the hardware store experiments.
Style and Build Analysis
The Satin Black finish against the Grey paint creates a menacing, stealthy vibe. It hides brake dust better than any gloss finish I have ever tested. I love how the dark wheels draw your eyes toward the aggressive body lines of the RS4.
These Brixton Forged wheels have a unique architectural quality to them. The spokes are thin, yet they feel incredibly rigid and purposeful. They don't just look like jewelry; they look like they were pulled off a DTM race car.
This build nails the proportions, which is rare for such a chunky wagon. The car looks planted, wide, and ready to attack a mountain pass. It creates a cohesive aesthetic that looks intentional from every single angle.
I have featured hundreds of Audis, but this one sits differently. Most people clutter their builds with too many accessories and loud colors. This owner kept it clean, dark, and focused on the essentials.
The stance makes the car look shorter and more muscular. It minimizes the visual bulk of the B9's rear end significantly. You can tell the owner spent a lot of time calculating the visual balance before pulling the trigger.
Why We Love This Build
When the sun hits the grey paint and the matte black wheels, the whole car just pops. The wheels fill those arches so tight it looks like the car was molded around them. It is the perfect blend of luxury performance and dark, street-legal aggression.
I have seen a lot of wheels, but the CM10 Ultrasport+ transforms the RS4 into a total predator. It stops traffic because it looks purposeful rather than just flashy. This is how you build an Audi for the modern era.
Every time I look at these photos, I want to go find my own set and hit the backroads. This build proves that less is definitely more when you pick the right parts. It is absolute perfection on four wheels.
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 RS4 B9
- Vehicle Color: Grey
- Wheel Brand & Model: Brixton Forged CM10 Ultrasport+
- Wheel Size: 20×10.5
- Offset: Contact dealer
- Wheel Finish: Satin Black
Before You Buy: Fitment Checklist
We talk to Audi RS4 owners every day. These are the questions we hear most before they pull the trigger on new wheels.
Will 20×10.5-inch wheels fit my Audi RS4? 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 RS4 owners run 20×10.5-inch wheels every day. The key is choosing the right tire with enough sidewall to absorb road imperfections.
