ST Coilovers ST XA galvanized steel (with damping adjustment) - BMW 1 Series E81 / E82 / E87

ST XA Coilovers – BMW 1 Series E81 / E82 / E87

Upgrade the suspension of your BMW 1 Series with ST XA Coilovers, combining adjustable ride height with adjustable rebound damping for greater control over both stance and handling.

Developed using KW Automotive suspension technology, the ST XA range gives you more tuning flexibility than the fixed-damping ST X while retaining a road-focused balance of performance and everyday usability.

ST part number:

18220039

Adjustable Rebound Damping

The main advantage of the ST XA over the ST X is adjustable rebound damping.

This allows you to fine-tune the suspension response to suit:

• Daily road driving
• Fast-road use
• Tyre choice
• Driver preference
• Vehicle setup
• Occasional track use

The rebound adjustment changes how quickly the damper extends after compression, allowing the chassis response to be made softer or firmer depending on your requirements.

Adjustable Ride Height

Ride height can also be adjusted through the coilover system.

For BMW E81 / E87 applications, the listed lowering range is approximately:

• Front: 35–65mm
• Rear: 35–65mm

For BMW E82 Coupe applications, the listed lowering range is approximately:

• Front: 30–55mm
• Rear: 25–50mm

The exact approved adjustment range depends on the chassis and vehicle specification, so the supplied installation documentation should always be followed.

Galvanized Steel Construction

ST XA coilovers use galvanized steel struts with additional corrosion protection.

Key features include:

• Galvanized steel construction
• Height-adjustable suspension
• Adjustable rebound damping
• Twin-tube damper design
• Vehicle-specific spring and damper calibration
• TÜV-approved application

Regular cleaning and maintenance of the threaded adjustment areas is recommended, particularly on cars used throughout winter.

Twin-Tube Damper Design

The ST XA uses twin-tube damper construction.

ST designs the XA range to provide a more sporting response while still retaining comfort and usability for road driving.

The added rebound adjustment allows the suspension character to be tailored more closely to the driver than the fixed-damping ST X.

Compatibility – Please Check Carefully

ST part number 18220039 is listed for selected rear-wheel-drive BMW 1 Series E8x applications.

Compatible chassis include:

• BMW 1 Series E81 Hatch
• BMW 1 Series E82 Coupe
• BMW 1 Series E87 Hatch

Published fitment data includes a broad selection of petrol and diesel models, including:

• 116i
• 118i
• 120i
• 125i
• 128i
• 130i
• 135i
• 116d
• 118d
• 120d
• 123d

Exact compatibility depends on chassis, engine, production date and axle loads, so the kit should not be selected purely by model name.

E81 / E87 Fitment Limits

For BMW E81 and E87 applications:

• Maximum front axle load: 920kg
• Maximum rear axle load: 1060kg
• Front lowering: 35–65mm
• Rear lowering: 35–65mm

These applications are rear-wheel drive only.

E82 Coupe Fitment Limits

For BMW E82 Coupe applications:

• Maximum front axle load: 945kg
• Maximum rear axle load: 1070kg
• Front lowering: 30–55mm
• Rear lowering: 25–50mm

Again, this application is for rear-wheel-drive vehicles.

Important Fitment Restrictions

This kit is not suitable for:

• Four-wheel-drive / xDrive models

ST also notes that wheel spacers may be required when using certain original wheel and tyre combinations to provide sufficient clearance between the wheel and suspension components.

Before ordering, please confirm:

• Exact chassis
• Engine variant
• Production year
• Front axle load
• Rear axle load
• Rear-wheel-drive configuration
• Wheel and tyre specification

If you're unsure whether this kit is correct for your BMW, contact The Rosso Corsa Collective with your registration or vehicle details and we can help confirm fitment.

ST X vs ST XA

ST X:

• Adjustable ride height
• Fixed damping

ST XA:

• Adjustable ride height
• Adjustable rebound damping

The ST XA is the better option for drivers who want the ability to fine-tune suspension response rather than relying on a factory-set damping configuration.

Designed for Fast-Road Use

The ST XA is particularly well suited to:

• Daily-driven performance cars
• Fast-road builds
• Lowered road cars
• Drivers wanting adjustable damping
• Occasional track use
• Cars running upgraded wheels and tyres

Product Image & Configuration Note

Product images are generic and are intended for illustration purposes only.

The exact components supplied can vary depending on vehicle application, including:

• Spring configuration
• Damper layout
• Mounting hardware
• Adjustment components

If you have specific fitment requirements or want confirmation of the exact kit configuration, please contact The Rosso Corsa Collective before ordering.

Professional Installation Recommended

Professional installation is recommended.

Following installation, the vehicle should receive a full wheel alignment and geometry setup to ensure correct handling, tyre wear and suspension performance.

Wheel and tyre clearance should also be checked throughout the full steering and suspension range.

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