ST Coilovers ST XTA galvanized steel (adjustable damping with top mounts) - BMW 1 Series E81 / E82 / E87

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

Upgrade the suspension of your BMW 1 Series with ST XTA Coilovers, combining adjustable ride height, adjustable rebound damping and aluminium uniball front top mounts for a more performance-focused road and track setup.

The ST XTA sits above the ST X and ST XA in the range, adding front top mount adjustment to the height and damping control already offered by the XA.

ST part number:

18220839

Adjustable Rebound Damping

The ST XTA features adjustable rebound damping, allowing the suspension response to be tuned around:

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

This gives greater control over how quickly the suspension extends after compression and allows the chassis to be made softer or firmer depending on how the car is being used. ST lists the XTA range as using adjustable damping alongside its height-adjustable suspension system.

Aluminium Uniball Front Top Mounts

A key feature of the ST XTA is the use of aluminium uniball front top mounts.

These provide additional geometry adjustment and allow front camber to be fine-tuned where the vehicle application permits it.

Potential benefits include:

• Increased front camber adjustment
• Improved tyre contact during cornering
• Greater geometry flexibility
• More focused front-end response
• Better suitability for fast-road and track setups

The exact degree of top mount adjustment depends on the vehicle application.

Adjustable Ride Height

Ride height can 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 range depends on chassis and vehicle specification, so the supplied documentation should always be followed during installation.

Galvanized Steel Construction

ST XTA coilovers use galvanized steel damper bodies with additional corrosion protection.

Key features include:

• Galvanized steel struts
• Height-adjustable suspension
• Adjustable rebound damping
• Aluminium uniball front top mounts
• Twin-tube damper construction
• Linear performance springs
• Vehicle-specific suspension calibration

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

Twin-Tube Damper Design

The ST XTA uses a low-friction twin-tube damper design developed using KW Automotive technology.

The system is designed to provide controlled road behaviour while allowing additional tuning through rebound adjustment and front geometry changes.

Compatibility – Please Check Carefully

ST part number 18220839 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 listings for this part number also reference E88 and 1M applications in some markets, but because exact axle loads and approved lowering ranges vary by body style, this page should be treated specifically as the E81 / E82 / E87 application unless fitment is confirmed separately.

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

Some older retailer data lists a 1050kg rear limit and 35–60mm lowering, so the current vehicle-specific documentation should take priority when confirming fitment.

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

ST lists this application specifically for rear-wheel-drive E82 Coupe models.

Important Fitment Restrictions

This kit is not suitable for:

• Four-wheel-drive / xDrive models

ST also notes that wheel spacers may be required with some 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 vs ST XTA

ST X:

• Adjustable ride height
• Fixed damping

ST XA:

• Adjustable ride height
• Adjustable rebound damping

ST XTA:

• Adjustable ride height
• Adjustable rebound damping
• Aluminium uniball front top mounts
• Camber adjustment where applicable

The XTA is the most performance-focused of these three options, providing greater geometry and damping control for drivers who want a more adjustable chassis setup.

Designed for Road & Track Use

The ST XTA is particularly well suited to:

• Fast-road builds
• Track days
• Clubsport-style cars
• Performance daily drivers
• Higher-grip tyre setups
• Drivers wanting additional front camber adjustment
• Cars requiring greater chassis tuning flexibility

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:

• Top mount design
• Camber adjustment range
• Spring configuration
• Damper layout
• Mounting hardware

If you have specific requirements such as top mount adjustment or need 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.

Because the XTA provides front geometry adjustment, camber and toe should be set specifically around the intended road or track use of the vehicle.

Explore More BMW 1 Series Suspension

BMW 1 Series E8x – Explore suspension, braking and performance upgrades for E81, E82, E87 and E88 models.

ST Suspension – Browse ST X, ST XA and ST XTA suspension upgrades.

Coilovers – Explore adjustable suspension systems for road and track use.

Suspension & Handling – Browse suspension, chassis and geometry upgrades.