BMW F20 F21 Wheel Rim Alloy 18" 7,5J ET:45 M Double Spoke 436 Orbitgrey 7847413

Visual condition of the part

The product shows signs of use visible in the photos.

BMW F20 F21 Wheel Rim Alloy 18" 7,5J ET:45 M Double Spoke 436 Orbitgrey is an original aluminum rim designed for the rear axle of 1-series models, engineered according to demanding BMW standards. Thanks to precisely selected geometric parameters and a robust construction, it provides a functional foundation for building a stable and predictable chassis. This is a solution for users seeking factory fitment and consistent body styling.

Specifications and technical data

• SKU: 7847413-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7847413
• Substitutable numbers: 7847413, 36117847413
• Location on the vehicle: Rear
• Rim diameter: 18"
• Rim width: 7.5
• Offset (ET): 45
• Hole diameter: 120
• Number of holes: 5
• Rim material: Aluminium
• Category: Rims

Purpose and fitment for BMW F20/F21

The rim has been designed as a rear axle component for BMW 1-series F20/F21 generation vehicles, which translates into proper load distribution and compatibility with the factory suspension. The applied mounting parameters and bolt pattern are consistent with typical BMW rear axle architecture, facilitating integration with stock hubs, braking systems, and overall body geometry.

By maintaining the original specification, the rim supports the proper operation of safety systems and driving assistants, such as traction control or electronic stability control, which are sensitive to changes in wheel geometry. This is particularly important for vehicles driven dynamically, where consistent vehicle behavior is of key importance.

Aluminum construction and performance characteristics

The rim is made of aluminum, which allows for a favorable strength-to-weight ratio compared to classic steel rims. A lighter construction helps reduce unsprung mass, which can positively influence suspension response to road irregularities and steering precision. At the same time, adequate rim stiffness is maintained, which is essential at higher speeds and under lateral loads.

The Orbitgrey finish gives the rim a subdued, technical look that complements both light and dark body colors. This type of color scheme is practical for daily use, as it visually masks typical operational dirt while highlighting the body lines and characteristic BMW styling.

Geometric parameters and impact on handling

The rim diameter and width have been selected to work with typical tire sizes used on the BMW F20/F21, ensuring proper tire support and lateral stability. The applied wheel offset is consistent with the factory track width concept, which helps maintain the correct wheel position relative to the wheel arch and suspension components.

The bolt pattern and center bore diameter are adapted to the standard used by BMW, allowing for the trouble-free use of stock mounting bolts and aftermarket solutions compliant with this standard. Such a configuration promotes even force distribution to the hub and minimizes the risk of improper rim seating.

Practical application and operation

As an item from the Wheels category, the Orbitgrey rim can be used both as a replacement for a damaged rear rim and as part of a complete set of summer or winter wheels. It performs well in daily city driving, on long-distance routes, and in more dynamic driving typical of BMW users.

The used condition means the rim has been previously operated, which is important when planning any preparatory work, such as balancing or checking for straightness. For many users, this is a favorable compromise between purchase cost and maintaining the manufacturer's original specification.

Support in selection and additional information

When selecting a rim, it is worth paying attention to the compatibility of mounting parameters with your specific BMW model and the intended use of the vehicle (city, highway, more dynamic driving). Information on part numbers and interchangeable numbers available in the technical specification can also be helpful, facilitating verification of compatibility with a specific equipment version.

If you are planning a comprehensive repair or upgrade of the chassis area in your BMW and need other components from the same group, such as additional rims, wheel sets, or alternative rim designs, check out the available parts in the BMW Wheels category.

If you want to better understand what to look for when buying rims from the secondary market and how to approach their refurbishment, check out the guide Used rims like new: a guide to buying and refurbishing aluminum rims, which discusses key aspects of selecting and refurbishing aluminum wheels.