AC Schnitzer 21" wheel & tyre set AC3 Evo forged silver-anthracite Michelin for BMW M5 F90 sedan (823929076274)

for M5 F90, M5 CS F90
with central locking optics "Gold"
including RDC wheel electronic modules
FA: 10,0 x 21" ET 22 with 275/30 R 21
RA: 10,0 x 21" ET 22 with 285/30 R 21

Scope of delivery
- 4 complete wheels:
AC Schnitzer AC3 “Evo” Lightweight Forged Alloy Wheels with premium tyres - mounted and balanced
- 4 central locking nuts in gold
- special tool for central locking nuts
- 4 pieces RDC wheel electronic module
- vehicle and rim-specific mounting and fastening material
- quality tag
- certificate of authenticity
- care instructions
- homologation certificate

Wheelset development at AC Schnitzer
A few definitions first

Wheel/Complete wheel = Rim including tire Wheelset = 4 wheels xi/xd Wheelsets = special wheelsets for all-wheel drive vehicles (xDrive) Mixed tires = Tires wider on the rear axle than on the front axle All-round tires = Tires the same on the front and rear axle
The wheels play a truly vital and therefore important role: they are the postcard-sized connection between the vehicle and the road. They are largely responsible for the acceleration and propulsion, as well as for the deceleration – i.e., braking – of your vehicle. The wheels therefore play a key role. Anyone who develops and sells wheels bears a great responsibility. We are aware of this responsibility; we have internalized it and implement it in every new development. At AC Schnitzer, we only use high-quality brand-name tires, developed in close cooperation with premium tire manufacturers. On the one hand, the tires must perfectly transfer the engine's power to the road; on the other hand, properties such as braking performance, lateral stability, water drainage in the rain, and straight-line stability are important decision criteria for or against a tire. A set of wide-base tires is always an investment in increased driving safety and dynamics. To maintain driving comfort when using larger wheel dimensions, we at AC Schnitzer have actively opted against run-flat tires and opted for sporty, conventional tires. Conventional tires create less rolling resistance and offer noticeably more comfort. AC Schnitzer specializes in mixed tire configurations, meaning wheel sets where the rear wheels are wider than the front wheels. This makes sense in terms of driving dynamics, as it allows for the transfer of strong drive forces while simultaneously enabling high steering precision. While the wider a tire, the more power you can deliver to the road, the rolling resistance caused by the tire must not be too great. Since this increases with the wider a tire, AC Schnitzer develops balanced wheel dimensions. AC Schnitzer develops special wheel/tire combinations for all-wheel drive vehicles, orienting themselves in these combinations to the vehicle manufacturer's specifications. You can recognize these AC Schnitzer wheel sets by the "xi/xd" designation. Only those wheel dimensions are developed and approved for all-wheel drive vehicles that are just as gentle on the transfer case as standard wheel sets. All AC Schnitzer wheel sets are tuned in multi-stage driving tests on the road and on race tracks. The wheels are only released for sale after successful testing. All AC Schnitzer wheel sets are delivered fully assembled and balanced. They are covered by a two-year manufacturer's warranty. The scope of delivery includes mounting materials such as adapters and wheel bolts, as well as the parts certificate (except for wheel sets marked for export).

Philosophy/Design
The wheels establish a car's connection to the road not only physically, but also visually. "That's why the right proportions of the rims to the body are so important," explains AC Schnitzer Chief Designer Michele Viandante. "Rims that are too small can quickly make a vehicle appear long-legged and unstable." The AC Schnitzer "AC3 Evo" lightweight forged wheels, in contrast, are truly down-to-earth. - Incorporated "SCHMIEDET" lettering - Incorporated AC Schnitzer lettering - Open design in silver/anthracite or anthracite/silver, allowing a direct view of the brakes - Central locking look in gold or gray. The highlight of AC Schnitzer wheel technology and the exclusive development for the BMW M5 is the latest development stage of the AC3 "Evo" lightweight forged wheels with central locking look. Even though the new lightweight forged wheels clearly belong to the AC3 design family, their appearance is particularly technical, thanks to the central locking nut and the no longer visible wheel bolts. The latter "disappear" beneath a special aluminum cover, which is screwed on together with the additional central locking nut. In addition to their sporty appearance, both of these features also serve as an anti-theft device, which is why a special key is included in the scope of delivery. The AC3 "Evo" lightweight forged wheels are available in two color variants: bi-color silver/anthracite or bi-color anthracite/silver. Depending on how extravagant or understated the customer wants their wheel set to be, they can choose between gray or gold for the color of the central locking nut. The AC3 "Evo" lightweight forged wheels have a partially polished and partially painted surface. Regardless of the color, all AC3 lightweight forged wheels feature two elegant, milled logos: "AC Schnitzer" and "SCHMIEDET." The central design element of the AC3 lightweight forged "Evo" wheels is not just a metaphorical one: the visible center locking nut with aluminum cover. This unit eliminates the need for a hub cap for the first time in AC Schnitzer's wheel history. The delicate yet solid spoke matrix with its five triangular struts of the AC3 lightweight forged wheels has been further weight-optimized for the new 21-inch version, and for the first time, this has also been done in the visible area of ??the wheels. Recesses are incorporated into the sidewalls of the spokes, minimizing the spoke wall thickness. The "art of omission" of the AC3 lightweight forged "Evo" wheels has not only led to weight reduction, but also created an even sportier look. - high-quality lightweight forged wheels save up to 25 - 35% weight compared to conventional cast wheels - noticeable reduction of unsprung masses and gyroscopic forces on the car,This results in significantly increased driving dynamics, significantly improved acceleration and deceleration due to lower masses, improved cornering handling, high-quality clear coat to protect the rim against corrosion, resulting in a long service life.

material
Around 97 percent of the melt consists of aluminum, but the remaining three percent of the wrought alloy also plays a role in influencing the desired material properties for the ideal wheel. In addition to the main component, aluminum, the alloy also contains one percent each of magnesium and titanium (which ensures finer grain). The precise composition of the material alloy has a significant influence on the final properties of the wheel. Pure aluminum Around 97 percent of the alloy consists of pure aluminum. The remaining three percent of the wrought alloy is important for the material's properties. Chromium The master alloy AlCr20, which contains the hard metal chromium, improves recrystallization resistance. Master alloy is a mixture of aluminum with other substances; in this case, it is a maximum of 0.25 percent by weight of chromium, which is a very small amount. Magnesium Magnesium, together with pure silicon, increases the strength of the overall alloy. The maximum proportion of these materials is 1.2 and 1.3 percent by weight respectively. Titanium These shiny bars are the master alloy AlTi5B1. It serves to finer the grain structure of the overall alloy. The proportion of the expensive raw material titanium is only 0.1 percent by weight. Silicon: These irregularly shaped lumps are only added to the alloy together with magnesium. This increases the strength. The silicon content is between 0.7 and 1.3 percent by weight. Manganese: The addition of 0.4 to 1.0% manganese makes the alloy tougher. The manganese has a positive effect on recrystallization behavior.

production
Forging – a complex process that must ensure the highest levels of safety. In many steps, the wheel is prepared for its important role in ensuring a long vehicle life. This process guarantees excellent material properties, which are the reason for the low weight of our forged wheels. Forged wheels offer optimal safety for the occupants, even in critical driving situations.

Step 1: The nozzle
A cast block of over 6 m in length manufactured by OTTO FUCHS is the starting material from which a nozzle, which is precisely tailored to the later wheel, is sawn off.

Step 2: Pre-forging
In the first forging stage, the nozzle is pre-forged into a rotationally symmetrical blank with a force of 4,000 tons.

Step 3: Designing
In the second forming stage, the styling is pressed into the pre-forged blank under a 7,000-ton press, which largely gives the wheel its final appearance.

Step 4: Punching
In the final forging stage with 800 tons of pressing force, the future ventilation hole windows and the hub bore are punched out and the burr made of excess material on the outer circumference is secured.

Step 5: Flow pressing
The outer edge of the blank is heated. The entire rim area, from the outer to the inner flange, is rolled out.

Step 6: Finishing
The final step involves finishing: turning, drilling, and deburring. Painting completes this complex process. Source: Material and production: Otto Fuchs KG

Surface silver/anthracite
In this process, the wheel is first primed and then completely painted. The surfaces that will later have a metallic luster are then turned and polished to a high gloss. Finally, a two-coat clear coat is applied, consisting of a polyester primer and an acrylic clear coat.

Test procedures / safety
After their design, the first sample rims are manufactured under real production conditions. These must undergo a multitude of tests. Among other things, their strength is tested. The bending test simulates the "rim lifespan." Every AC Schnitzer rim must survive this lifespan unscathed in order to be produced and sold. Vehicle-specific tests, including test installations with clearance measurements and driving tests on public roads and racetracks, follow. Only after these procedures do our rims receive homologation, i.e., approval for use on public roads. Wheels are safety-critical components. Therefore, they are inspected and tested with the utmost care. This begins with initial chemical material tests and concludes with rigorous endurance tests on test machines: - §30 StVZO wheel guidelines - ECE R124 - Bending tests - 90° impact test - Rolling tests

Scope of delivery
- 4 complete wheels AC Schnitzer AC3 "Evo" lightweight forged wheels with premium tires
- mounted and balanced
- 4 central locking nuts optionally in gold or gray
- Special wrench for central locking nuts
- Vehicle- and wheel-specific assembly and fastening material
- Quality tag
- Certificate of authenticity
- Care instructions
- Report

Uniqueness of the wheelset with the AC3 “Evo” lightweight forged rims
- Weight-optimized rims using forging technology paired with premium tires
- Vehicle-specific tuning through multi-stage driving tests on the road and racetrack
- Rim with integrated lettering: "AC Schnitzer" and "SCHMIEDET"
- Open rim design in silver/anthracite or anthracite/silver, allowing a direct view of the brakes
- Compatible with the standard RDC system - Rim also available separately
- 2-year warranty
- Developed exclusively for BMW vehicles
- Production monitored according to ISO standards
- KDS mount for wheel alignment according to BMW specifications is available

Stock Availability

Due to the amount of bespoke orders it is not always possible for us to keep every item in stock at all times. If you require the item urgently please contact us to check stock before purchase.

Call on 01933 685840

Wheels & Tyres

All wheel & tyre packages are special order and cannot be cancelled or returned once purchased.

All in stock wheel & tyre packages come from Germany and have a 2-3 week lead time which includes tyre fitting.

Can I have these parts fitted?

We offer fitting on all our parts.

If you would like your parts fitting please contact us at 

info@ac-schnitzer.co.uk before you order online.

UK Next Day Delivery

We offer UK next working day delivery on all IN STOCK products. Please note all stock coming from Germany can be subject to 2-3 week lead time. Once in the UK these will be shipped UK next working day.

Any lead times longer than this and we will contact you to let you know.