BST full carbon swingarm BMW M1000RR Sport (2021-2022)

Pure performance for track and street

Read all about the available finishes and colors in this blog about BST carbon wheels. The same uncompromising carbon philosophy can be found in this swingarm.

This is not a detail upgrade. This is chassis engineering at the highest level. The BST carbon swingarm for the BMW M1000RR is developed for riders who know exactly where performance comes from: control, feedback, and stability under maximum load.

With a weight of just approx. 4.6 kg and extremely high torsional stiffness, this swingarm represents a fundamental improvement to the chassis. Superlight, razor-sharp, and designed to fully unlock the potential of the M1000RR – on the street and on the track.

• Extremely low weight: approx. 4.6 kg (±30% lighter than OEM)
• Drastically lower unsprung mass for a faster response
• Higher torsional stiffness for maximum stability and feedback
• More grip and control when accelerating and braking
• Direct OEM replacement, fully plug & play

An upgrade you cannot see, but can feel immediately

The swingarm plays a key role in how your M1000RR feels as the pace increases. Every movement of the rear wheel, every acceleration force, and every bump is processed through this component. By reducing the weight to approximately 4.6 kg, BST significantly reduces unsprung mass.

Less unsprung mass means the rear wheel can respond more quickly to changes in load and road surface. The result is more mechanical grip, faster acceleration, and a bike that remains calmer when you demand its maximum.

This is not a subtle difference. Especially when accelerating hard out of corners, at high cornering speeds, and when braking hard, you notice that the rear remains more consistent and predictable.

Torsional stiffness: where true control begins

What truly sets this BST swingarm apart is its torsional stiffness. Carbon makes it possible to make the swingarm significantly stiffer laterally than a conventional aluminum construction, without adding weight.

Why is that important? Because unwanted flex in the swingarm directly affects your line, grip, and confidence. The less the swingarm twists, the more accurately forces are transferred to the frame.

In practice, this means:

• More stability when accelerating hard while leaned over
• More consistent feedback from the rear wheel
• Less instability at high speed and under heavy loads

The interaction between swingarm and suspension

An important advantage of a stiffer swingarm is often overlooked: its influence on the suspension. The more stable and consistent the swingarm, the less the rear shock has to compensate for unwanted movement.

The BST carbon swingarm creates a stable platform that allows the suspension to work more effectively. This means you can set up the rear suspension softer without losing grip, or tune it more precisely for track use.

The result:

• Greater suspension adjustment range
• More traction on uneven asphalt
• Calmer handling through long, fast corners

This is precisely why high-end race bikes and WSBK machines rely so heavily on chassis stiffness. The suspension can only excel when the foundation is right.

From prototype to high-performance component

This swingarm is the result of extensive development and testing under extreme loads. BST has thoroughly tested prototypes for torsional, fatigue, and impact loads, far beyond what normal street or track use requires.

The carbon lay-up is specifically tuned to combine maximum strength and stiffness with low weight. The result is a swingarm that is not only lighter than OEM, but structurally stronger and more consistent in performance.

Plug & play, as it should be

Despite the advanced technology, installation remains simple. The BST carbon swingarm is designed as a direct replacement for the original aluminum swingarm.

• Uses OEM rear axle and wheel bearings
• Compatible with original chain tensioners
• OEM brake components retained
• Axle adjustment range identical to the original

The swingarm is delivered ready for installation and fits without extensive modifications. No compromise between performance and ease of use.

BST quality – tested and proven

BST is known for carbon components that are not only lightweight, but also durable and reliable. Every swingarm is individually inspected and tested before leaving the factory.

This is not a fragile racing component, but a fully-fledged upgrade for intensive use.

Q&A – frequently asked questions

Is this swingarm suitable for street use?
Yes. Developed for both track and street use and fully compatible with OEM components.

What will I notice while riding?
More stability, better feedback, and a calmer rear wheel under high loads, especially when accelerating and braking.

Do I need to replace any other parts?
No. The swingarm is a direct OEM replacement.

In short

• Approx. 4.6 kg carbon swingarm
• Lower unsprung mass = more grip and control
• Higher torsional stiffness = more stable handling
• Get more out of your suspension, without compromise
• One of the most significant chassis upgrades for the M1000RR

This is not an accessory. It is a fundamental upgrade to how your BMW M1000RR rides, feels, and performs.