Suspension Secrets Eccentric Rear Control Arm Roll Centre Correction Bushes - BMW 1M

Suspension Secrets Eccentric Rear Control Arm Roll Centre Correction Bushes – BMW 1M

Correct the rear suspension geometry of your lowered BMW E82 1M with Suspension Secrets Eccentric Rear Control Arm Roll Centre Correction Bushes.

Lowering a car changes more than just ride height. One of the less obvious but important effects is a change in roll centre position, which can alter how the chassis feels through corners and affect front-to-rear balance.

Suspension Secrets developed these eccentric bushes to correct the rear roll centre after lowering, helping restore stability, grip and more predictable handling.

Why Roll Centre Matters

The roll centre influences how the chassis reacts to lateral load during cornering.

When the car is lowered, the rear suspension geometry changes and the roll centre can move away from its intended position.

If this change becomes too significant, it can affect:

• Chassis balance
• Rear axle stability
• Cornering predictability
• Weight transfer behaviour
• Overall handling confidence

Correcting the roll centre helps restore a more suitable suspension geometry for the lowered ride height.

Eccentric Offset Design

The bush is designed to replace the OEM solid bush located in the rear hub where the rear lower control arm, often referred to as the coffin arm, attaches to the upright.

Its eccentric design allows the bush to be installed in a specific orientation to reposition the suspension pickup point and correct the rear roll centre.

This provides a geometry correction rather than simply replacing the standard component with a stiffer alternative.

Corrected Rear Roll Centre

With the bush correctly installed, the altered suspension pickup point helps compensate for the geometric changes caused by lowering.

Potential benefits include:

• More stable rear axle behaviour
• Improved chassis balance
• Better consistency through corners
• Increased rear-end confidence
• More predictable handling

Improved Corner Exit Traction

Correcting the rear suspension geometry can help the tyre work more effectively as the car transitions through and out of a corner.

This can contribute to:

• Improved corner-exit traction
• Better rear axle grip
• More confidence when applying throttle
• More consistent rear-end behaviour

The final result will still depend on the complete suspension setup, geometry and tyre choice.

Restored Chassis Balance After Lowering

A lowered car can become less balanced if the suspension geometry is not corrected alongside the ride-height change.

These bushes are designed to help restore the relationship between the front and rear suspension, making the car feel more predictable and controlled.

This is especially useful for:

• Track-focused builds
• Coilover-equipped cars
• Aggressively lowered cars
• Higher-grip tyre setups
• Cars running performance geometry

More Stability at the Apex

By correcting the rear roll centre, the rear axle can behave more consistently when the car is heavily loaded mid-corner.

This can help provide:

• Improved apex stability
• More predictable weight transfer
• Greater confidence at higher cornering loads
• Improved rear grip

UK Designed & Manufactured

Suspension Secrets designs and manufactures these components in the UK.

Construction includes:

• Billet 6082 T6 aircraft-grade aluminium
• Corrosion-resistant 303 stainless steel
• Motorsport-spec Fluro rod ends
• Motorsport-grade Rodoball bearings where applicable

These materials are selected for strength, durability and use in demanding road and track environments.

Key Benefits

• Corrected rear roll centre
• Improved corner-exit traction
• Restored chassis balance after lowering
• Increased rear axle grip
• More stability at the apex
• More predictable handling
• Increased driver confidence
• Designed specifically for lowered BMW 1M applications
• Billet 6082 T6 aluminium construction
• Corrosion-resistant 303 stainless-steel components
• Designed and manufactured in the UK

Ideal for Lowered BMW 1M Builds

These bushes are particularly useful for cars fitted with:

• Lowering springs
• Coilovers
• Track-focused suspension
• Aggressive ride heights
• Performance geometry setups

They are intended to address a geometry issue caused by lowering rather than simply changing stiffness.

Lifetime Warranty

Suspension Secrets states that its suspension products are covered by a lifetime warranty, including applicable bearings, subject to its warranty terms.

Vehicle Fitment

Designed for:

• BMW E82 1M Coupe

The bush replaces the OEM rear hub bush at the rear lower control arm / coffin arm mounting point.

If you are unsure whether this component is suitable for your suspension setup or ride height, please contact The Rosso Corsa Collective before ordering.

Professional Installation & Geometry Setup Recommended

Professional installation is strongly recommended.

Correct orientation of the eccentric bush is essential for the intended roll centre correction.

Following installation, the vehicle should receive a full four-wheel geometry setup so camber, toe and overall rear suspension alignment can be checked and adjusted correctly.

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