Suspension Secrets Handling Pack 3 (Track) - BMW F20 M135i/M140i

Suspension Secrets Handling Pack 3 (Track) – BMW F20 M135i / M140i

Transform your BMW F20 M135i or M140i into a fully track-focused chassis with Suspension Secrets Handling Pack 3.

This package is designed for serious trackday and circuit use, particularly cars running semi-slick tyres where the limitations of the standard suspension become much more apparent.

The factory F20 chassis uses a large number of compliant rubber bushes and offers relatively limited geometry adjustment. Under sustained track loads, this can allow unwanted suspension movement and geometry changes that reduce grip, consistency and braking stability.

Handling Pack 3 replaces or upgrades these key areas with adjustable arms, solid bushes, rose-jointed components, uprated anti-roll bars and performance coilovers to create a much more precise suspension system.

Why Choose Handling Pack 3?

Handling Pack 3 is designed for drivers prioritising maximum on-track performance over road comfort.

Key benefits include:

• Extensive suspension geometry adjustment
• Reduced unwanted suspension movement
• Improved mid-corner grip
• Increased stability under heavy braking
• Sharper turn-in
• More precise rear axle control
• Improved chassis response
• Uprated anti-roll bars
• Suitable for semi-slick track tyres
• Designed for dedicated track-focused builds

What's Included?

The Suspension Secrets Handling Pack 3 includes:

• Choice of adjustable coilovers
• Suspension Secrets Adjustable Front Drop Links
• Suspension Secrets Adjustable Rear Drop Links
• Suspension Secrets Adjustable Rear Toe Arms
• Rear Toe Lockout Kit
• Suspension Secrets Off-Centre Caster Control Arm Bushes
• H&R Anti-Roll Bars
• Suspension Secrets Adjustable Rear Camber Arms
• Suspension Secrets Adjustable Rear Upper Third Link Arms
• Suspension Secrets Adjustable Rear Traction Arms
• Suspension Secrets Solid Rear Control Arm Bushes

Together, these components address damping, body control, geometry adjustment and unwanted suspension compliance.

Adjustable Front & Rear Drop Links

Lowering a car changes the operating position of the anti-roll bars and can introduce unwanted preload.

Adjustable drop links allow the anti-roll bars to be set correctly at the new ride height.

This helps improve:

• Left-to-right chassis balance
• Anti-roll bar operation
• Suspension consistency
• Cornering behaviour

Adjustable Rear Toe Arms

Rear toe has a major influence on stability, traction and cornering behaviour.

The adjustable rear toe arms allow significantly greater control over the rear alignment than the factory components.

This makes it possible to tailor rear toe for:

• High-speed stability
• Corner entry
• Mid-corner balance
• Traction
• Tyre management

Rear Toe Lockout Kit

The included rear toe lockout kit removes reliance on the factory eccentric adjustment system.

This helps keep the chosen toe setting more securely in position during demanding track use and allows the adjustable arms to provide the required alignment control.

Off-Centre Caster Control Arm Bushes

The Suspension Secrets off-centre caster bushes alter the front suspension geometry while reducing unwanted bush compliance.

Additional caster can help improve:

• Turn-in response
• Steering feel
• Front-end stability
• Dynamic camber during cornering
• Cornering confidence

This is particularly beneficial on cars running higher-grip tyres.

H&R Anti-Roll Bars

H&R Anti-Roll Bars are included to provide additional control over chassis roll.

Compared with the standard bars, the uprated setup can help:

• Reduce excessive body roll
• Improve response during direction changes
• Increase chassis precision
• Improve cornering balance

Anti-roll bars should be configured as part of the complete suspension setup rather than treated as an isolated modification.

Adjustable Rear Camber Arms

Rear camber becomes increasingly important as cornering loads and tyre grip increase.

The adjustable rear camber arms allow the rear geometry to be configured around:

• Semi-slick tyres
• Ride height
• Track characteristics
• Driver preference
• Desired chassis balance

Correctly configured camber helps maintain a more effective tyre contact patch through loaded corners.

Adjustable Rear Upper Third Links

The adjustable rear upper third links provide additional control over the rear suspension kinematics.

Together with the toe, camber and traction arms, they allow the rear axle to be set up with a much greater degree of precision than the standard suspension.

Adjustable Rear Traction Arms

The adjustable rear traction arms further expand the available rear suspension adjustment.

They help control the position and behaviour of the rear wheel under:

• Acceleration
• Braking
• Cornering
• Suspension compression

This is particularly valuable when setting up a car for repeated high-load circuit driving.

Solid Rear Control Arm Bushes

The factory rubber rear bushes are designed partly around refinement and can deform significantly under track loads.

The solid rear control arm bushes reduce this movement, helping keep the rear suspension geometry more stable.

Potential benefits include:

• Improved rear-end precision
• Better mid-corner stability
• More consistent traction
• Improved braking behaviour
• Greater geometry consistency

Reduced Rubber Compliance

A major objective of Handling Pack 3 is to remove the unwanted movement associated with the standard rubber suspension components.

With more of the suspension located through solid bushes and rose-jointed components, cornering forces are transferred more directly between the tyres and chassis.

This creates a more immediate and predictable suspension response.

Improved Mid-Corner Grip

Keeping the wheel alignment more consistent under load allows the tyres to work more effectively.

When correctly set up, this can provide:

• Greater sustained cornering grip
• More predictable chassis balance
• Improved tyre contact
• Greater confidence at the limit

Improved Heavy-Braking Stability

Heavy braking places substantial longitudinal load through the suspension.

Compliant factory bushes can deform under these forces and allow unwanted alignment changes.

Reducing this movement helps create a more stable platform under hard braking.

Designed for Semi-Slick Tyres

Handling Pack 3 is specifically suited to cars running semi-slick trackday tyres.

Higher-grip tyres place significantly greater loads through the suspension, making geometry control and bush stiffness increasingly important.

This package provides the chassis control required to take better advantage of that additional tyre grip.

Dedicated Track-Focused Package

Handling Pack 3 sits above the road-focused and Clubsport handling packages.

It is intended for:

• Dedicated trackday cars
• Serious circuit builds
• Semi-slick tyre setups
• Time-attack inspired builds
• High-grip performance cars

NVH & Road Use

Because Handling Pack 3 replaces several compliant factory components with solid or rose-jointed alternatives, increased noise, vibration and harshness should be expected.

Compared with Handling Pack 1 and Handling Pack 2, road refinement is given a much lower priority.

This package is intended primarily for track-focused vehicles where chassis precision and consistency are more important than factory comfort levels.

Professional Installation Required

Handling Pack 3 contains multiple adjustable suspension components and should be fitted by an experienced performance workshop.

Correct installation should include:

• Ride-height setup
• Suspension clearance checks
• Anti-roll bar setup
• Droplink adjustment
• Full alignment
• Corner weighting where applicable

Track Geometry Setup Essential

A full performance geometry setup is essential after installation.

The optimum settings will depend on:

• Tyre choice
• Track use
• Ride height
• Coilover specification
• Anti-roll bar setup
• Driver preference
• Desired chassis balance

For serious circuit use, setup should ideally be carried out by a specialist familiar with BMW F20 track geometry.

Vehicle Fitment

BMW 1 Series F20

Compatible models:

• BMW M135i F20
• BMW M140i F20

What's Included?

• Adjustable Front Drop Links
• Adjustable Rear Drop Links
• Adjustable Rear Toe Arms
• Rear Toe Lockout Kit
• Off-Centre Caster Control Arm Bushes
• H&R Anti-Roll Bars
• Adjustable Rear Camber Arms
• Adjustable Rear Upper Third Link Arms
• Adjustable Rear Traction Arms
• Solid Rear Control Arm Bushes

Explore More BMW F20 Suspension

BMW 1 Series F20/F21 – Explore suspension, handling and performance upgrades for the M135i, M140i and wider F20/F21 platform.

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

Suspension Arms & Alignment – Explore adjustable arms, geometry components and track-focused alignment upgrades.

Coilovers – Browse adjustable suspension systems for performance and track use.

Suspension & Handling – Explore coilovers, bushes, anti-roll bars and chassis upgrades.