AC Schnitzer 20" wheel & tyre set AC4 Black Michelin for BMW 3 series G20/G21

AC Schnitzer 20" wheel & tyre set AC4 Black Michelin for BMW 3 series G20/G21

for G20/G21
including RDC wheel electronics modules
- Note: To identify the correct RDC modules, please indicate the chassis number when ordering !
- PHEV on request
- For homologation lowering required
- Note: Rear axle load max. 1340kg / load reduction of the RA for 340i / 340d may be necessary !

Part Nr.: 82413206428


Expert opinion
Overview
for 3 series sedan G20 / Touring G21
- Note: To identify the correct RDC modules, please indicate the chassis number when ordering !
- PHEV on request
- For homologation lowering required
including RDC wheel electronics modules.
- Note: Rear axle load max. 1340kg / load reduction of the RA for 340i / 340d may be necessary !

Wheel set with AC4 Flowforming Wheels

- weight-optimized
- developed exclusively for BMW vehicles
- machined original AC Schnitzer logo
- open design in Black, giving a clear view to the brakes

Uniqueness of the wheel set with the AC4 Flowforming Wheels:
- engineered in Germany
- compatible with standard RDC system
- also available as a rim without tyre
- warranty 2 years
- production monitored according to ISO standard
- Black, optionally also in BiColor Silver/Black
- KDS mount for wheel alignment according to BMW specification is available
- Spacers/mounting package for the best possible position in the wheel arch (to be ordered separately)
- Assembly package vehicle specific

Scope of delivery:
- 4 complete wheels:
4 rims AC4 Flowforming Black – mounted and balanced
- 4 pieces RDC wheel electronics modules
- specific hub cover
- homologation certificate
- vehicle- and rim-specific mounting and fastening material
- 2 years manufacturer's warranty

FA: 8,5 x 20" offset 23 with 235/35 R 20
RA: 9,5 x 20" offset 40 with 265/30 R 20

Scope of delivery
- 4 complete wheels:
- AC4 Flow Forming rims one-piece in Black
- mounted and balanced
- pentagonal hub cover with AC Schnitzer logo
- Optional vehicle- and rim-specific mounting and fastening material
- 4 pieces RDC wheel electronic module
- care instructions
- homologation certificate
- 4 pieces RDC wheel electronic module
EU tyre label
Fuel efficiency FA: Fuel efficiency: E
RA: Fuel efficiency: E
Wet grip FA: Wet grip: A
RA: Wet grip: A
Noise category / level FA: Noise category / level: B / 71
RA: Noise category / level: B / 71
Description
Wheelset development at AC Schnitzer
A few definitions in advance

Wheel/complete wheel = rim incl. tyre
Wheel set = 4 wheels
All-round tyres = same tyre size on the front and the rear axle


The wheels have a really important role: they are the postcard-sized connection between the vehicle and the road. They play a key role in the driving and propulsion as well as the deceleration - i.e. braking - of your vehicle. This gives the wheels a key role. Anyone who develops and sells wheels therefore has a great responsibility. We are aware of this responsibility; we have internalized it and implement it with every new development.

AC Schnitzer only uses high-quality brand tyres, which are developed in close cooperation with premium tyre manufacturers. On the one hand, the tyres have to transfer the power of the engine perfectly to the road, on the other hand, properties such as braking behaviour, lateral control, water drainage in rain and the properties in straight running are important decision criteria for or against a tyre.

A wheel set with wide base tyres is always also an investment in increasing driving safety and dynamics. In order to maintain driving comfort when using larger wheel dimensions, we at AC Schnitzer have actively opted against run-flat tyres and for sporty, conventional tyres. Conventional tires build up less rolling resistance and offer noticeably more comfort.

All AC Schnitzer wheel sets are tuned in multi-stage driving tests in traffic and on race tracks. Only after successful test runs the wheels are released for sale. All AC Schnitzer wheel sets are delivered fully assembled and balanced. They are subject to a two-year manufacturer's warranty. The scope of delivery includes mounting materials such as adapters and wheel bolts as well as the homologation certificate (with the exception of marked wheelsets for export).

Philosophy/Design
Technically modern design combined with a high quality production process, these attributes characterise the AC Schnitzer AC4 Flowforming wheel generation, which is launched in the sizes 8.5J x 20" and 9.5J x 20", in the colour variants BiColor Silver/Black and Black.

The circumferential undercut reflects the high technical standard of the AC4 Flowforming rim. This is because this design element can actually only be realised if it is machined out of a solid material, such as is required in the forging process, as it is located behind the spokes. The undercut of the AC4 Flowforming rims is particularly visible on the BiColor version, as it brings out the high-quality aluminium with its silver surface.

Material
Only high-quality aluminium alloys are used. The material is additionally heat-treated in the production process, which results in higher strength and simultaneous weight reduction.
Material samples during the production process guarantee the constant and high quality of the material.

Manufacture
Due to the production process, the new AC4 Flowforming rims are lighter than conventionally cast alloy rims and this is measurable: the 8.5J x 20" weighs just 11 kg and the 9.5J x 20" rim also weighs only 11.9 kg.

The flowforming process is one of the most advanced manufacturing technologies in wheel industry. In this production process, after the actual aluminium casting, the raw product is further processed by rolling it out. This step serves to compress the metal, which guarantees greater stability and impact resistance of the rim.

On the other hand, the improved stability also allows the design of the wheels to be more filigree, as the wall thicknesses can be significantly thinner compared to conventionally manufactured rims.

Surface Black
In this process, the wheel is first primed, then completely painted. A two-layer clear coat is then applied, consisting of a polyester primer and the matt 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, the strength is tested. The "rim life" is simulated in the bending circumferential test. Every AC Schnitzer rim must withstand this intact in order to be allowed to be produced and sold at all.
This is followed by vehicle-specific tests, including test installations with check of unobstructed movement and driving tests on public roads and on race tracks. Only after these procedures our rims receive their homologation, i.e. the approval to be used in road traffic.

Wheels are safety-relevant components. Therefore, they are checked and tested with the greatest care. This starts with the first chemical material tests and ends with hard testing machine endurance runs:

- § 30 StVZO wheel guideline
- ECE R124
- Bending-rotation tests
- 90° impact test
- unwinding tests

Scope of delivery:
- 4 complete wheels:
4 rims AC4 Flowforming Black – mounted and balanced
- 4 pieces RDC wheel electronics modules
- specific hub cover
- homologation certificate
- vehicle- and rim-specific mounting and fastening material
- 2 years manufacturer's warranty

Uniqueness of the wheel set with the AC4 Flowforming Wheels:

- weight-optimized
- developed exclusively for BMW vehicles
- machined original AC Schnitzer logo
- open design in Black, giving a clear view to the brakes
- engineered in Germany
- compatible with standard RDC system
- also available as a rim without tyre
- warranty 2 years
- production monitored according to ISO standard
- Black, optionally also in BiColor Silver/Black
- KDS mount for wheel alignment according to BMW specification is available
- Spacers/mounting package for the best possible position in the wheel arch (to be ordered separately)
Multimedia & Documents

Step beyond the series to AC Schnitzer and discover custom-designed components for those very special driving moments

  • a BMW becomes your BMW
  • products beyond the standard
  • racetrack-tested and homologated
  • market leader
  • test winner and record holder
  • engineered in Germany

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