Suspension Secrets Front Offset Caster Bushes - BMW F22 M235i/M240i

Suspension Secrets Front Offset Caster Bushes – BMW F22 M235i / M240i

Transform the front-end response of your BMW F22 M235i or M240i with Suspension Secrets Front Offset Caster Bushes.

The standard front lower control arm bushes use soft rubber, which can flex significantly under cornering and braking loads. This movement can contribute to vague steering, understeer and reduced stability when braking hard.

Suspension Secrets Front Offset Caster Bushes replace this compliant arrangement with a solid, rose-jointed solution that reduces unwanted movement while also increasing positive caster.

The result is a more accurate and communicative front axle with improved braking stability, stronger steering feel and greater cornering grip.

Why Upgrade to Front Offset Caster Bushes?

These bushes are designed to improve both front axle precision and suspension geometry.

Potential benefits include:

• Increased positive caster
• Improved steering feel
• Increased front-end grip
• Better braking stability
• More accurate steering
• Reduced unwanted suspension deflection
• Greater control over caster settings
• Improved wheel positioning with adjustable top mounts

Key Features

• Designed for BMW F22 M235i and M240i
• Solid front control arm bush design
• Offset rose-joint construction
• Increases positive caster
• Improves steering feel
• Improves braking stability
• Helps increase cornering grip
• Reduces unwanted bush deflection
• Useful with caster-adjustable top mounts
• Helps reposition the front wheel within the arch

The Problem With the Factory Bushes

The factory front lower control arm bushes use soft rubber to provide comfort and refinement.

Under harder driving, this rubber can flex significantly.

This can contribute to:

• Vague steering
• Reduced front-end precision
• Increased understeer
• Dynamic geometry changes
• Instability under heavy braking

Reducing this compliance helps the front suspension remain more consistent under load.

Solid Bush Design

Unlike the original rubber bushes, the Suspension Secrets design does not rely on soft bush compliance.

This helps reduce unwanted control arm movement and creates a more direct connection between the suspension and chassis.

Potential benefits include:

• More accurate steering
• Sharper response
• Improved braking confidence
• Greater chassis precision

Increased Positive Caster

The offset rose-joint design increases positive caster.

Caster has a significant influence on steering feel, high-speed stability and the way front camber changes as steering angle is applied.

Increasing positive caster can provide:

• Stronger steering self-centring
• Improved steering feedback
• Better high-speed stability
• Increased dynamic camber gain
• Greater cornering grip

Dynamic Camber Gain

One of the main performance benefits of positive caster is the additional camber generated as the front wheels turn.

As steering angle increases, positive caster helps create more useful negative camber on the loaded outside front wheel.

This can help improve:

• Front tyre contact
• Cornering grip
• Turn-in response
• Mid-corner confidence
• Resistance to understeer

Improved Steering Feel

Reducing rubber deflection and increasing caster can make the steering feel more communicative and precise.

Potential improvements include:

• Better front tyre feedback
• More accurate steering response
• Greater confidence at speed
• Improved turn-in consistency

Improved Braking Stability

The original control arm bushes can deform when subjected to heavy braking forces.

This can allow the front suspension geometry to move and make the car feel less stable.

The solid bush design reduces this movement, helping maintain more consistent front axle geometry under braking.

Greater Caster Control

These bushes are particularly useful for cars already fitted with caster-adjustable top mounts.

Combining top-mount adjustment with offset caster bushes gives a geometry specialist much greater freedom when configuring the front axle.

This allows caster to be tuned around:

• Road use
• Track use
• Ride height
• Tyre specification
• Driver preference

Helps Correct Wheel Position in the Arch

Running aggressive caster through adjustable top mounts can move the front wheels away from the centre of the wheel arch.

At higher caster settings, this can cause the tyre to contact the inner arch liner when steering.

The offset caster bushes can be used to help reposition the wheel within the arch while retaining the desired caster setting.

Helps Prevent Inner Arch Liner Contact

For cars running aggressive front geometry, wheel clearance can become a limiting factor.

The offset design can help reduce the chance of:

• Tyre-to-liner contact
• Wheel arch rubbing
• Clearance issues at steering lock

This allows more aggressive geometry to be retained without necessarily reducing caster at the top mount.

Ideal for Performance Geometry

These bushes are particularly well suited to:

• Fast-road builds
• Clubsport cars
• Trackday cars
• Cars running adjustable top mounts
• Semi-slick tyre setups
• Aggressive front geometry

Works Well With Camber/Caster Plates

The offset caster bushes complement adjustable camber/caster top mounts particularly well.

Together, they provide much greater control over:

• Front camber
• Front caster
• Wheel position
• Tyre clearance
• Steering response

This makes them a strong option for more developed F22 suspension setups.

Works Well With Other Suspension Upgrades

The bushes also pair well with:

• Coilovers
• Lowering springs
• Adjustable front drop links
• Uprated anti-roll bars
• Adjustable rear arms
• Performance geometry setups

NVH Considerations

Because these bushes use a solid, rose-jointed design rather than compliant factory rubber, some increase in noise, vibration and harshness may be expected.

This is a performance-focused upgrade intended for drivers prioritising steering precision and geometry control over factory levels of refinement.

Professional Installation Recommended

Professional installation is recommended.

After fitting, the car should receive:

• Suspension inspection
• Steering clearance checks
• Wheel alignment
• Caster setup
• Camber setup
• Toe adjustment

Geometry Setup Essential

A professional geometry setup is strongly recommended after installation.

Caster, camber and toe should be configured together to suit:

• Road or track use
• Ride height
• Tyre choice
• Top-mount settings
• Desired handling 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 Front Offset Caster Bushes

Explore More BMW F22 Suspension

BMW 2 Series F22/F23 – Explore suspension, handling and performance upgrades for the M235i, M240i and wider F22/F23 platform.

Suspension Secrets – Browse the wider Suspension Secrets chassis and geometry range.

Bushes – Explore upgraded suspension and chassis bush solutions.

Suspension Arms & Alignment – Browse caster, camber, toe and geometry components.

Suspension & Handling – Explore coilovers, springs, bushes and chassis upgrades.