Suspension Secrets Full Kinematics Kit - BMW F20 M135i/M140i

Suspension Secrets Full Kinematics Kit – BMW F20 M135i / M140i

Unlock significantly greater suspension adjustability and maximise grip on track with the Suspension Secrets Full Kinematics Kit for the BMW F20 M135i and M140i.

Developed extensively through track testing, this comprehensive chassis package replaces several key factory suspension components with fully adjustable arms and uprated bushes. The aim is to give the F20 chassis the geometry control and reduced suspension compliance required for serious track use.

Designed to be installed alongside a suitable set of coilovers, the Full Kinematics Kit provides the core suspension components required to transform an M135i or M140i from a fast road car into a much more focused track setup.

Why Choose the Full Kinematics Kit?

The factory F20 suspension was designed around road comfort and everyday usability, meaning there are limitations to both geometry adjustment and suspension stiffness when the car is pushed hard on circuit.

The Full Kinematics Kit addresses these limitations by providing:

• Increased suspension geometry adjustment
• Reduced unwanted bush deflection
• Improved cornering grip
• Greater stability under heavy braking
• Sharper turn-in
• More consistent rear axle behaviour
• Increased suspension precision
• Track-focused chassis control

What's Included?

The Suspension Secrets Full Kinematics Kit includes:

• 1 pair Suspension Secrets Adjustable Rear Toe Arms
• Rear toe lockout kit
• 1 pair Suspension Secrets Adjustable Rear Camber Arms
• 1 pair Suspension Secrets Adjustable Rear Traction Arms / Trailing Arms
• 1 pair Suspension Secrets Solid Rear Control Arm Bushes
• 1 pair Suspension Secrets Solid Front Offset Caster Bushes
• 1 pair Suspension Secrets Adjustable Rear Upper Third Links

Together, these components provide extensive control over the front and rear suspension geometry.

Designed for Track Use

This is a significantly more focused package than a conventional road suspension upgrade.

The Full Kinematics Kit has been developed for drivers looking to maximise the capability of the F20 chassis on circuit by removing key areas of unwanted compliance and dramatically increasing geometry adjustment.

It is particularly suited to:

• Dedicated track cars
• Serious trackday builds
• High-grip tyre setups
• Motorsport-inspired builds
• Cars running aggressive performance geometry

Adjustable Rear Toe Arms

The adjustable rear toe arms provide greater control over rear wheel toe compared with the factory setup.

Rear toe has an important influence on:

• High-speed stability
• Corner entry
• Rear-end behaviour
• Traction
• Tyre wear

The included rear toe lockout kit removes the unwanted movement associated with the original adjustment mechanism and allows the aftermarket toe arms to provide controlled adjustment.

Adjustable Rear Camber Arms

Rear camber becomes increasingly important as grip levels and cornering speeds increase.

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

• Tyre choice
• Ride height
• Track layout
• Driving style
• Intended handling balance

Correctly configured rear camber can help improve tyre contact and cornering performance.

Adjustable Rear Traction Arms

The included adjustable rear traction arms, also referred to as trailing arms, provide another level of control over rear suspension geometry.

Replacing the factory components allows the rear suspension position to be configured more accurately and helps reduce unwanted movement under acceleration, braking and cornering loads.

Adjustable Rear Upper Third Links

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

Combined with the adjustable toe, camber and traction arms, they allow a much greater proportion of the rear axle geometry to be configured around the requirements of a dedicated track setup.

Solid Rear Control Arm Bushes

The kit replaces key compliant rear control arm bushes with Suspension Secrets solid bush components.

Factory rubber bushes are designed to absorb vibration and improve road comfort, but they can also deform under high suspension loads.

Reducing this compliance helps maintain more consistent suspension geometry during:

• Hard cornering
• Heavy braking
• Acceleration
• Direction changes

This can contribute to a more precise and predictable rear axle.

Solid Front Offset Caster Bushes

At the front of the car, Suspension Secrets Solid Offset Caster Bushes reduce unwanted compliance while also altering the suspension geometry to provide a more performance-focused setup.

Improved caster characteristics can contribute to:

• Stronger turn-in response
• Improved steering feel
• Better front-end stability
• Increased cornering confidence

Reduced Suspension Deflection

One of the key objectives of the Full Kinematics Kit is to remove some of the factory rubber compliance from the suspension system.

Under high cornering and braking loads, soft rubber bushes can deform and allow the wheel alignment to move away from its static settings.

Reducing this movement means the geometry can remain more consistent when the car is being driven hard.

Improved Cornering Grip

With greater control over camber, toe and other suspension parameters, the chassis can be configured to make better use of performance tyres.

When professionally set up, this can provide:

• Greater front and rear grip
• More consistent tyre contact
• Better cornering balance
• Improved mid-corner stability
• More predictable behaviour at the limit

Improved Stability Under Heavy Braking

Suspension bush movement and geometry changes can make a car feel nervous under heavy braking.

By reducing unwanted compliance and providing greater geometry control, the Full Kinematics Kit helps create a more stable and consistent platform during hard braking.

Sharper Turn-In

Reducing deflection in the front suspension allows steering inputs to translate more directly into changes in wheel direction.

Combined with a correctly configured geometry setup, this can provide a noticeably sharper and more immediate front-end response.

Extensive Geometry Adjustment

The combination of adjustable suspension arms gives a specialist significantly greater freedom when configuring the vehicle.

This allows geometry to be tailored around factors including:

• Slick or semi-slick tyres
• Vehicle ride height
• Spring rates
• Track characteristics
• Aero
• Driver preference

For serious track cars, this level of adjustability is essential for extracting maximum performance from the chassis.

Designed to Work With Coilovers

Suspension Secrets designed the Full Kinematics Kit to be installed alongside a suitable performance coilover system.

Coilovers provide control over the spring and damper behaviour, while the kinematics components provide the geometry adjustment and reduced compliance required to make full use of the upgraded suspension.

Together, they create the foundation for a highly capable F20 track chassis.

High-Quality Materials

Suspension Secrets manufactures its components exclusively using materials selected for strength and durability, including:

• 6082 T6 aluminium
• 303 stainless steel
• EN19T steel

These materials are used throughout the Suspension Secrets range to provide reliable components suitable for demanding performance applications.

Designed & Manufactured In-House

Suspension Secrets products are designed, developed and manufactured in-house by their engineering team.

This allows the components to be developed as part of a complete suspension system rather than as unrelated individual upgrades.

Lifetime Warranty

Suspension Secrets states that its products are covered by a lifetime warranty, including the bearings used within the components.

Warranty conditions and exclusions should be checked before purchase.

Track-Focused NVH Considerations

Unlike the road-focused Suspension Secrets Handling Pack 1, this kit deliberately removes some of the compliant rubber components from the suspension.

As a result, customers should expect the potential for increased noise, vibration and harshness compared with the standard suspension.

This is a performance-focused package intended primarily for cars where maximum chassis precision takes priority over factory levels of refinement.

Professional Installation Required

Due to the number of adjustable components included, professional installation is strongly recommended.

The suspension should be installed and configured by a workshop familiar with performance BMW geometry.

Performance Geometry Setup Essential

A full geometry setup is essential after installation.

Simply fitting adjustable arms without correctly configuring them will not deliver the intended performance benefits.

The final alignment should be tailored around:

• Intended track use
• Tyre specification
• Ride height
• Coilover setup
• Driver preference
• Desired chassis balance

Vehicle Fitment

BMW 1 Series F20

Compatible models:

• BMW M135i F20
• BMW M140i F20

What's Included?

• Adjustable Rear Toe Arms – 1 pair
• Rear Toe Lockout Kit
• Adjustable Rear Camber Arms – 1 pair
• Adjustable Rear Traction / Trailing Arms – 1 pair
• Solid Rear Control Arm Bushes – 1 pair
• Solid Front Offset Caster Bushes – 1 pair
• Adjustable Rear Upper Third Links – 1 pair

Explore More BMW F20 Suspension

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