BMW F20 F21 F22 F23 Wheel Alloy Rim Ferric Grey 18" M Double Spoke 436 ET:52 8J

Visual condition of the part

The product shows signs of use visible in the photos.

BMW F20 F21 F22 F23 Wheel Alloy Rim Ferric Grey 18" M Double Spoke 436 ET:52 8J is an original M-line alloy rim, designed for precise handling and a cohesive look with the factory BMW sports package. The Ferric Grey finish highlights the car's dynamic character, while the M Double Spoke design provides an attractive, sporty appearance while maintaining appropriate durability. This is a solution for drivers who want to maintain factory specifications while improving the aesthetics of their vehicle.

Specifications and technical data

• SKU: 7845871-5
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7845871
• Substitutable numbers: 7845871, 36117845871
• Color: Grey
• Rim diameter: 18"
• Rim width: 8
• Offset (ET): 52
• Hole diameter: 120
• Number of holes: 5
• Rim material: Aluminium
• Category: Rims

Rim design and purpose

The presented rim belongs to the M Double Spoke series, which features a characteristic multi-spoke layout, stylistically matched to BMW models from the F20, F21, F22, and F23 families. This type of rim has been developed for stable handling at higher speeds, predictable cornering behavior, and compatibility with the factory suspension and braking systems of these models.

The grey finish of the rim blends well with both light and dark body colors, creating a cohesive, understated, yet distinctly sporty look. The aluminum construction allows for a reduction in unsprung mass compared to typical steel rims, which translates into better suspension response and more precise steering feedback.

Geometric parameters and fitment

The rim has been designed specifically for the BMW F-series platform, with appropriately selected width, diameter, and mounting parameters. This ensures that the correct suspension geometry is maintained, and the wheel operates in the position intended by the manufacturer relative to the wheel arch and brake components.

• The properly selected rim width promotes stable tire seating and even pressure distribution.
• The rim's mounting parameters are adapted to BMW hubs with five mounting holes.
• The bolt pattern and diameter of the mounting holes ensure correct seating of the rim on the hub without the need for spacers or non-standard bolts.
• The rim offset has been selected to maintain the factory wheel line and avoid collisions with suspension components.

A rim configured in this way allows for trouble-free installation in place of factory rims, while maintaining the handling characteristics intended by the manufacturer.

Material and performance properties

The rim is made of aluminum, which provides a favorable strength-to-weight ratio and good resistance to typical operational loads. An aluminum rim dissipates heat from the braking system better than a steel rim, which is important during dynamic driving and frequent braking.

The grey surface finish is practical for everyday use – brake dust is less visible than on light-colored rims, and at the same time, the rim retains an elegant, sporty character. The M Double Spoke design also facilitates visual inspection of the condition of brake discs and calipers, which is important when servicing the car.

Application in BMW F-series

This rim was developed for BMW F20, F21, F22, and F23 models, which means stylistic consistency with the body line and compatibility with factory tire configurations. The original M design emphasizes the sporty character of versions with the M package, but it will also work well as an visually attractive upgrade for standard variants of these models.

Choosing an original M Double Spoke series rim allows you to maintain compliance with the manufacturer's factory assumptions regarding loads, stiffness, and geometry, which is important for both safety and the durability of suspension components.

Condition and benefits of purchasing a used rim

The rim comes from the Wheels category and is offered as a used item, which allows for a significant cost reduction compared to a new rim while maintaining original BMW specifications. This is a good solution when it is necessary to replace a single rim after mechanical damage or when you are planning a gradual upgrade of a set of wheels.

When purchasing a used alloy rim, it is worth paying attention to the condition of the surface, any signs of wear, and the compatibility of parameters with the other wheels on the car. Detailed technical data, such as diameter, width, mounting parameters, and material, can be found in the specification section – this will allow you to easily compare this rim with your currently used set.

If you are planning a comprehensive repair or upgrade of the wheel and tire area in your BMW and need other items from the same group, such as additional rims, wheel sets, or rims with a different finish, check out the available parts in the BMW Wheels category.

Practical tips before purchase

Before choosing this rim, it is worth verifying the compatibility of the tire size you plan to use with the vehicle manufacturer's recommendations. You should also ensure that the mounting parameters match your car's configuration, which will help avoid problems with seating the wheel on the hub and steering system performance.

For drivers considering purchasing rims from the secondary market or refreshing an existing set, a detailed guide describing the process of selecting and refurbishing alloy rims will be useful – you can find it in the article Used rims like new: a guide to buying and refurbishing alloy rims, which discusses key technical and operational aspects.