TUNED

MASS

DAMPER

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A complete front axle vibration damping ecosystem for road and gravel bikes.

combining RS Development hardware with 3phos powered configuration software.

Developed by RS Development, the TMD system targets high frequency vibrations at the front axle without adding suspension travel or changing the steering geometry.

Combined with a dedicated configuration tool developed with 3phos, the system can be tuned according to bike type, rider profile, terrain and use case.

THE PROBLEM IS VIBRATION

Rough asphalt, cobblestones and gravel generate high frequency vibrations that travel through the front wheel, fork, handlebar and rider’s upper body. Traditional comfort solutions often add travel, weight or complexity.

The TMD system takes another route. It does not suspend the front end. It reduces selected vibration frequencies directly at the source, helping the bike remain precise while improving comfort and control.

HARDWARE

Two units work symmetrically, one on each fork leg. Inside each unit, a moving mass slides on a precision guide rod between springs and low friction bearings. When the front structure vibrates within the target frequency range, the internal mass moves in opposition and dissipates energy.

  • TWO UNITS PER BIKE

    Balanced damping on both fork legs.

    The TMD system uses one damper unit on each side of the fork, creating a symmetrical response across the front end of the bike. This balanced layout helps control vibration without introducing uneven forces into the fork structure. The result is a calmer front axle feel while preserving the natural precision and stability of the bike.

  • NO ADDED TRAVEL

    The fork remains rigid and precise.

    Unlike suspension based comfort systems, the TMD does not move the wheel through additional travel. The fork keeps its structural rigidity, which means the rider still feels a direct connection to the front tire. Comfort is improved through vibration control, not through fork movement, so the bike remains sharp under braking, cornering and high speed riding.

  • NO GEOMETRY CHANGE

    No change in axle to crown length.

    The system does not alter the core dimensions of the bike. Axle to crown length, steering geometry, stack, trail and handling character remain unchanged. This makes the TMD especially relevant for performance road and gravel platforms where geometry is carefully defined and even small changes can affect the way the bike rides.

  • INTERNAL MOVING MASS

    The system counteracts vibration through tuned mechanical motion.

    Inside each damper unit, a calibrated mass moves against the vibration of the fork structure. When the front wheel is excited by rough asphalt, gravel, cobblestones or repeated surface chatter, the internal mass reacts in opposition to the vibration movement. This counter motion helps dissipate energy before it reaches the handlebar, hands, arms and upper body of the rider.

  • MODULAR SETUP

    Mass and spring combinations allow frequency tuning.

    The TMD system can be adapted through different internal masses and spring rates. By changing these elements, the natural frequency of the damper can be adjusted to suit a specific bike platform, rider profile, surface type or performance target. This modular architecture allows the system to be configured for road, gravel, endurance, pavé or mixed surface use rather than relying on a single generic setup.

“Less vibration. More control. Same geometry.”

SOFTWARE CONFIGURED BY PHYSICS

RS Development worked with 3phos to develop a dedicated configuration tool for the TMD system. Its role is to define the correct damping setup for each bike architecture, rider profile, terrain type and performance objective.

Instead of using a fixed universal configuration, the tool allows the TMD to be tuned with a higher level of precision. It helps determine how the system should behave depending on the vibration characteristics of the bike and the conditions it is designed for.

BIKE TYPE

Road, gravel, endurance or mixed surface platforms

TERRAIN PROFILE

Smooth asphalt, rough road, cobblestones, gravel, pavé or ultra distance use.

RIDER PARAMETERS

Rider weight, position, intensity and comfort target.

USE CASE

Racing, endurance, bikepacking, fast gravel or all road riding.

“The hardware absorbs vibration.
The software makes it specific.”

STRUCTURAL VIBRATION ENGINEERING

The 3phos tool is based on a physics driven approach to tuned mass dampers and particle dampers. It uses structural vibration modelling, multi mode physics, Den Hartog tuning logic and frequency domain analysis to understand how the system should be configured.

MULTI MODE PHYSICS

The system considers the dynamic behavior of the front structure, not only a single simplified vibration peak.

DEN HARTOG TUNING

The configuration logic uses established tuned mass damper principles to define optimal frequency behavior.

FREQUENCY SEPARATION

The tool distinguishes low frequency suspension movement from higher frequency structural vibration.

VALIdated approach

The 3phos material mentions comparison with lab data and a Monte Carlo design space.

DIFFERENTIATION WITHOUT REWRITING THE BIKE

For brands and frame builders, the TMD Front Axle System offers a way to add real performance and comfort while preserving existing fork geometry, stiffness targets and platform identity.

It is scalable, tunable and suitable for a wide range of rider weights, disciplines and markets.

PERFORMANCE UPGRADE

Comfort and control where riders feel it most

CLEAN INTEGRATION

No visible suspension system required

SCALABLE PLATFORM

Adaptable for gravel, endurance and road applications

FROM CONCEPT TO PRODUCT

The Tuned Mass Damper Front Axle System brings a proven engineering principle into performance cycling. It uses physics intelligently instead of adding unnecessary complexity.

The result is a compact, elegant and tunable system ready to be developed into next generation gravel and road platforms.

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DEVELOP THE NEXT BENCHMARK IN COMFORT, CONTROL AND SPEED

RS Development LLC is looking to collaborate with brands, frame builders and technical partners interested in integrating tuned mass damping technology into future cycling platforms.