ST Coilovers ST X galvanized steel (with fixed damping) - BMW 1 Series E81 / E82 / E87
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ST X Coilovers – BMW 1 Series E81 / E82 / E87
Upgrade the suspension of your BMW 1 Series with ST X Coilovers, combining adjustable ride height with factory-set damping for a straightforward fast-road suspension upgrade.
Developed using KW Automotive suspension technology, the ST X range is designed to provide sportier handling, reduced body movement and a lower stance while retaining everyday usability.
ST part number:
13220039
Fixed Damping Setup
The ST X uses factory-set damping rather than user-adjustable damping.
This makes it well suited to drivers who want:
- Improved road handling
- Adjustable ride height
- A lower, more purposeful stance
- A pre-configured damper setup
- No need to manually tune damping settings
ST calibrates the damping to provide a balance between sporty response and everyday road comfort.
Adjustable Ride Height
For E81 and E87 applications, this kit is commonly listed with an approximate lowering range of:
- Front: 35–65mm
- Rear: 35–65mm
For E82 Coupe applications, some application data lists approximately:
- Front: 30–55mm
- Rear: 25–50mm
The exact approved adjustment range can therefore vary by chassis and vehicle specification, so the supplied documentation should always be followed during installation.
Galvanized Steel Construction
ST X coilovers use galvanized steel struts with additional surface protection to improve corrosion resistance.
Key construction features include:
- Galvanized steel damper bodies
- Additional corrosion-resistant coating
- Chrome-plated piston rods
- Twin-tube damper construction
- Adjustable spring platforms
- Application-specific springs
- Bump stops and dust protection
Regular cleaning and maintenance of the threaded adjustment areas is recommended, particularly on vehicles driven year-round.
Twin-Tube Damper Design
The ST X range uses twin-tube damper construction.
The system is designed to deliver sportier handling by helping reduce body roll and improve chassis response while still retaining suitable road comfort for everyday driving.
Compatibility – Please Check Carefully
ST part number 13220039 is listed for selected 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 also associates this part number with certain E88 applications, although E88 Convertible-specific ST listings can use different lowering figures or alternative part numbers depending on application.
Because of this, exact compatibility should always be checked using the vehicle model, production date and axle loads rather than chassis code alone.
Maximum Axle Loads
Commonly published maximum axle loads for this application are:
- Front axle: 920kg
- Rear axle: 1060kg
Some older UK listings state a 1050kg rear limit, so we recommend checking the current ST application data and your vehicle identification plate before ordering.
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 achieve sufficient clearance between the wheel and suspension components.
Before ordering, please confirm:
- Exact BMW model
- Chassis code
- Production year
- Engine variant
- Front axle load
- Rear axle load
- Rear-wheel-drive configuration
- Wheel and tyre specification
If you're unsure whether this is the correct kit for your BMW, contact The Rosso Corsa Collective with your registration or vehicle details and we can help confirm fitment.
Designed for Fast-Road Use
The ST X is particularly well suited to:
- Daily-driven performance cars
- Fast-road builds
- Lowered road cars
- Drivers wanting improved stance
- Drivers wanting height adjustment without damping adjustment
For drivers wanting additional tuning flexibility, the ST XA adds adjustable rebound damping, while the ST XTA range adds further suspension and top-mount adjustment depending on application.
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 shape, damper configuration, mounts and additional hardware.
If you have a specific requirement 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.
Wheel and tyre clearance should also be checked throughout the full steering and suspension range.
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