Suspension Secrets Solid Rear Control Arm Bushes - BMW F22 M235i/M240i

Suspension Secrets Solid Rear Control Arm Bushes – BMW F22 M235i / M240i

Increase rear axle stability, predictability and cornering grip with Suspension Secrets Solid Rear Control Arm Bushes for the BMW F22 M235i and M240i.

The factory rear control arm bushes use compliant rubber which can flex under heavy cornering loads. As the bushes deflect, rear camber can change dynamically, reducing consistency through the corner and affecting how effectively the tyre maintains contact with the road.

Changes in rear camber can also influence rear toe, which can make the rear axle feel nervous or as though it is “scrabbling” for grip.

Suspension Secrets Solid Rear Control Arm Bushes reduce this unwanted movement, helping the rear suspension maintain more consistent camber and toe under load.

Why Upgrade the Rear Control Arm Bushes?

Reducing compliance in the rear suspension helps the wheel geometry remain closer to the alignment settings chosen during setup.

Potential benefits include:

• Increased rear axle stability
• More consistent rear camber
• Reduced unwanted toe change
• Improved cornering grip
• More predictable handling
• Greater sense of connection to the rear axle
• Improved road and track dynamics
• Better stability during high-load cornering

Key Features

• Designed for BMW F22 M235i and M240i
• Solid rear control arm bush design
• Reduces unwanted suspension deflection
• Helps maintain rear camber under load
• Helps maintain rear toe under load
• Increased rear axle stability
• Improved cornering grip
• More precise handling
• Motorsport-grade Rodoball bearings
• Billet aircraft-grade 6082 T6 aluminium
• Corrosion-resistant 316 stainless steel components
• Motorsport-spec Fluro rod ends
• Designed and manufactured in the UK

The Problem With the Factory Rear Bushes

The OEM rubber bushes are designed partly around comfort and refinement.

Under harder cornering loads, however, they can deform significantly.

This allows the rear suspension arms to move relative to the chassis and can result in dynamic changes to the wheel alignment.

Dynamic Camber Change

As the rear control arm bushes flex, the rear camber angle can change.

This can reduce consistency in the tyre contact patch as cornering loads increase.

Instead of maintaining the geometry set during alignment, the suspension can move away from those settings when the car is being pushed hard.

Dynamic Toe Change

Rear camber and toe behaviour are linked within the suspension geometry.

As the bush deflects and the wheel position changes, rear toe can also move away from its static alignment setting.

This can make the rear axle feel:

• Nervous
• Inconsistent
• Less predictable
• Less stable at the limit

Reduced Rear Suspension Deflection

The Suspension Secrets solid bush solution is designed to reduce this movement.

By minimising unwanted bush deflection, rear camber and toe can remain more consistent as the suspension is loaded.

This creates a more stable and predictable rear axle.

Increased Rear Axle Stability

More consistent geometry can help the rear of the car remain settled through fast corners and direction changes.

Potential benefits include:

• Improved high-speed confidence
• More predictable cornering behaviour
• Better chassis balance
• Greater rear-end stability

Increased Cornering Grip

Keeping the rear wheel geometry more stable helps the tyre maintain a more consistent relationship with the road surface.

When correctly set up, this can contribute to:

• Greater mid-corner grip
• More consistent traction
• Improved tyre utilisation
• Better confidence through loaded corners

Improved Sense of Connection

Reducing rubber compliance creates a more direct relationship between the rear suspension and chassis.

This can give the driver a clearer sense of how much grip is available from the rear axle.

For performance driving, this can make the car feel more precise and easier to understand close to the limit.

More Precise Handling

Because the suspension geometry moves less under load, the car can respond more consistently to driver inputs.

Potential benefits include:

• More predictable corner entry
• Greater mid-corner stability
• Improved rear-end confidence
• Better feedback during direction changes

Motorsport-Grade Rodoball Bearings

Suspension Secrets uses motorsport-grade Rodoball bearings within the bush assemblies.

These are selected to provide precise articulation and durability under demanding suspension loads.

6082 T6 Aluminium Construction

Suspension Secrets components are manufactured from billet aircraft-grade 6082 T6 aluminium.

This provides a strong and lightweight structure suitable for high-load chassis applications.

316 Stainless Steel Components

Corrosion-resistant 316 stainless steel is used throughout the relevant componentry.

This helps improve durability in an exposed suspension environment.

Road & Track Use

These bushes are suitable for performance-focused road cars as well as track builds.

They are particularly well suited to:

• Fast-road M235i/M240i builds
• Clubsport cars
• Trackday vehicles
• Cars running performance geometry
• High-grip tyre setups

NVH Considerations

Because these bushes replace compliant factory rubber components with a solid, motorsport-oriented design, some increase in noise, vibration and harshness may be expected.

This is a performance-focused upgrade intended for drivers who prioritise rear axle precision and geometry stability over factory levels of refinement.

Works Well With Other Suspension Upgrades

Solid rear control arm bushes work particularly well alongside:

• Adjustable rear camber arms
• Adjustable rear toe arms
• Adjustable rear traction arms
• Adjustable rear upper third links
• Coilovers
• Uprated anti-roll bars
• Performance geometry setups

Reducing unwanted bush movement allows these other suspension components to work more consistently.

Professional Installation Recommended

Professional installation is recommended due to the need to remove and replace suspension bush components correctly.

After fitting, the vehicle should receive:

• Suspension inspection
• Fastener checks
• Wheel alignment
• Rear camber setup
• Rear toe setup

Geometry Setup Recommended

A professional geometry setup is strongly recommended after installation.

This ensures the improved suspension stability is matched with correctly configured:

• Rear camber
• Rear toe
• Ride height
• Overall chassis balance

Vehicle Fitment

BMW 2 Series F22

Compatible models:

• BMW M235i F22
• BMW M240i F22

What's Included?

Each kit includes:

• 1 pair Suspension Secrets Solid Rear Control Arm Bushes

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