Recommended with Nitron Suspension
Vehicle Fitment
Listed fitment: BMW M135i and M140i F20 and F21.
Please check the product title, part number and fitment notes before ordering. If you are unsure whether this part fits your vehicle, contact us with your registration or VIN and we will confirm compatibility.
Nitron NTR R1 Coilovers - BMW M135i/M140i F20/F21
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Nitron NTR R1 coilovers for BMW M135i and M140i F20/F21 applications provide linked compression/rebound adjustment in a serviceable damper package. This listing concerns the F20/F21 hatchback generation, not a later F40 M135i or G42 M240i.
Identify the exact F20/F21 build
Nitron's application catalogue identifies M135i and M140i within this suspension family. Confirm the drivetrain, factory damper equipment and current mounting arrangement before ordering. xDrive compatibility or retention of adaptive damping must not be assumed from the engine badge alone.
R1 for road and track setup
A single control changes compression and rebound together, keeping the damping setup process straightforward. Spring specification and ride height still need to suit tyre grip, road mileage, available travel and intended circuit use.
Agree the supplied top mounts, rear spring arrangement and any electronic-damping accessories before ordering. The single product variant does not mean all optional configurations are included. Nitron's rebuildable dampers support later maintenance.
Compare the matching R3
The F20/F21 NTR R3 kit offers independent rebound and high-/low-speed compression. Compare it when those controls will be used methodically rather than selecting solely by price.
Explore M135i suspension or M140i suspension for the wider chassis options. Check compatibility between dampers and any aftermarket arms or mounts, then complete fitting with measured alignment. Confirm current build timing before booking installation.
Product specifications
- Brand
- Nitron Racing
- Product type
- Suspension Coilovers
- Vehicle make
- BMW
- Vehicle model
- M135i and M140i
- Vehicle variant
- F20 and F21
Get in Touch
Have a question about our products or services? Need assistance with your order? We're here to help! Feel free to reach out to us through any of the following channels:
Email:
Drop us an email at sales@nineteen72performance.co.uk and our team will get back to you as soon as possible. We aim to respond to all inquiries within 24 hours.
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Get in Touch
Have a question about our products or services? Need assistance with your order? We're here to help! Feel free to reach out to us through any of the following channels:
Email:
Drop us an email at sales@nineteen72performance.co.uk and our team will get back to you as soon as possible. We aim to respond to all inquiries within 24 hours.
Social Media:
Connect with us on social media for the latest updates, promotions, and automotive inspiration
- Facebook: @Nineteen72Performance
- Instagram: @Nineteen72Performance
- TikTok: @Nineteen72Performance
Feedback:
We value your feedback and suggestions. Let us know how we can serve you better by filling out our Feedback Form.
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Why buy from us?
Recommended with Nitron Suspension
Why buy from us?
Vehicle Fitment
Listed fitment: BMW M135i and M140i F20 and F21.
Please check the product title, part number and fitment notes before ordering. If you are unsure whether this part fits your vehicle, contact us with your registration or VIN and we will confirm compatibility.
Nitron FAQ's
Here's some frequently asked questions about Nitron Suspension
Which Nitron suspension kit is best for road use?
For most road and fast road cars, we’d usually look at the Nitron RoadSport or NTR R1 kits. The RoadSport kit is designed to balance performance, comfort and reliability, while still keeping ride quality sensible for daily driving. The NTR R1 is a step up if you want more adjustment and a more focused road/track setup.
What is the difference between Nitron RoadSport, R1 and R3 coilovers?
The Nitron RoadSport kit is the most road-focused option, using OE top mounts and following the OE rear suspension type, making it a good choice for comfort and everyday use. The NTR R1 gives you easy-to-use 2-way combined damping control and is built for strong road and track performance. The NTR R3 is the more serious option, with independent 3-way damping adjustment, giving separate control of rebound, high-speed compression and low-speed compression for drivers who want to fine-tune the car properly.
Are Nitron coilovers suitable for track use?
Yes, Nitron suspension is very well suited to track use, but the right kit depends on how serious the car is. The NTR R1 is a strong option for fast road and track day use, while the NTR R3 is better suited to more focused builds where you want a larger range of adjustment and more detailed control over the car’s behaviour.
Are Nitron coilovers rebuildable or serviceable?
Yes, one of the big benefits of Nitron suspension is that the shocks are designed to be fully serviceable. Nitron state that their modular shock design allows products to be serviced, with critical components, fluids, gas, seals and bushes replaced to return the product to an “as new” technical condition.
What does Nitron R3 adjustment actually do?
Nitron R3 coilovers give independent 3-way damping adjustment. That means you can adjust rebound separately from high-speed and low-speed compression. In simple terms, it gives much more control over how the car reacts under braking, cornering, kerb strikes, bumps and weight transfer. For most normal road cars it may be more than needed, but for track-focused cars it’s a proper step up.
Do Nitron coilovers need setting up after fitting?
Yes, definitely. Nitron suspension should be installed properly, and after fitting we’d always recommend setting ride height sensibly, checking preload where applicable and carrying out a full alignment. For more serious road and track cars, corner weighting and proper geometry setup are well worth doing so you actually get the benefit from the suspension rather than just fitting it and leaving it.
What is the difference between a divorced rear and a true rear coilover setup?
On some vehicles, the factory rear suspension uses a divorced layout, where the spring and damper are mounted separately. A true rear coilover setup moves the spring onto the damper body, creating a coilover-style rear arrangement. The best option depends on the vehicle, how it’s used and what the suspension kit is designed for. For most road and fast road builds, we’d normally stick with the layout recommended by Nitron for that specific application.
Should I choose a divorced rear or true rear coilover setup?
If the car is mainly used on the road, a divorced rear setup is often the more suitable choice, especially where it follows the original suspension design. A true rear coilover setup can offer more adjustment and can be useful on certain track-focused builds, but it is not always the best option for every car. We’d always recommend choosing the correct Nitron kit for the vehicle rather than assuming true rear is automatically better.
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