Simply better in every way.

The new Fulcrum Speed 42 and 57 are Fulcrum’s step into a new era and dimension, the result of the fundamental synergy between form and function: Form, Function, Fulcrum.

The Speed 42 and 57 are the culmination of a process that included over 4000 hours of testing in the wind tunnel, laboratory and the open road. We tested seven versions of the rim, in multiple configurations, in order to obtain the best performance in terms of aerodynamics, rolling resistance, lightness and handling, without compromising safety. An evolution without compromises: the new rims (higher, wider, lighter and more aerodynamic), the new hubs and the new spokes come together in a perfect wheel system that weighs 1,410 grams for the 42 mm version and 1,495 grams for the 57 mm version. The graphics have been completely redesigned too and reflect the new Form Function Fulcrum brand identity, with a minimal and at the same time refined design, which includes new icons that provide all the product’s technical information.
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Simply better
in every way

+2 mm higher
+4 mm wider
+6 ratchet teeth
Up to 85 grams lighter
Up to 17% better handling
Up to 10% better reactivity

The rim
The new Speed are available in two versions, with 42 mm and 57 mm profiles, which replace the previous 40 mm and 55 mm sizes, whilst the inner rim width has been increased from 19 mm to 23 mm. The nose of the rim has also been widened with a radius of 9.5 mm.
The new wider rims, paired with 28 mm tires, provide a level of performance without compromises, with optimum aerodynamic penetration, rolling resistance and comfort. The average aerodynamic advantage, measured in the wind tunnel with a headwind, has been increased by 10% compared to a rim with an inner rim width of 19 mm. Despite the higher profile, handling has been improved considerably. Fulcrum carried out a specific research project to define a formula that would take into account the energy dissipated by the wheel during changes in direction and the flexural deformation based on roll and inclination. The data measured confirmed that the new Speed have seen an improvement of up to 17% compared to the previous generation.
The inner rim channel does not have any holes thanks to our MOMAG assembly technology, which allows for a 2-WAY FIT™ tubeless rim, without the need for tubeless rim tape and the presence of the traditional hook ensures the maximum compatibility with all tube-type and tubeless tires on the market and the maximum safety for riders. The lack of holes in the rim channel allows us to maintain the same stiffness along the whole perimeter and achieve greater resistance to impacts. This is also helped by the nipple holes, which are created in the mold, without having to drill the rim like traditional wheels, which weakens the structure as it cuts the carbon fibre.
The rim is constructed with resins and fibres made to Fulcrum specifications where, unlike previous versions, we use a new composite mix of FF100 high modulus unidirectional fibres for the Speed 42 and 57.
Moreover we use our patented DRSC™ (Directional Rim-Spoke Coupling) system. A specific plastic support is sunk in the carbon, between the nipples and the rim, to provide greater stiffness and durability of the system, distributing the stress of the nipple on a wider area more uniformly and avoiding potential situations of galvanic corrosion. The internal finish of the channel is obtained with C-LUX™ technology, which is polished to ensure an easy and optimal mounting and seating of the tire, while the external rim finish is obtained with the DIMF (Direct Inmold Matt Finish) technology, which has a matt finish. The result is a surface that reveals the precise layup of the underlying fibres, on which the new product graphics are applied by laser directly on the fibre, along with the new ultrathin metal labels.

The spokes

For the Speed 42 and 57 we have used 24 aerodynamic flat spokes Ø 2/1.6/2 mm and 2/1.7/2 mm, designed specifically for this wheel and laced with the Two-to-One™ system, which doubles the spokes in the areas subject to greater mechanical stresses, to prevent the dispersion of energy and contrast the torsional force.
The front wheel therefore has 16 spokes on the disc side and 8 on the other side, whilst the rear wheel is built in the opposite way to contrast the forces developed by the transmission. This specific construction, along with the perfect tensioning of the spokes, provides the wheels with the torsional stiffness required to ensure the maximum transfer of power. Considering the flexural deformation and the torsional deformation based on the translation, rolling and inclination energies, the new Speed achieve a 10% improvement compared to the previous generation.
The spokes are perfectly aligned between the hub and the rim so that they never touch, to improve performance and increase the life of the wheel. This is one of the key points of the Fulcrum product philosophy, which is applied to all the wheels.

The hubs

The hubs have been completely redesigned to house a more precise and lighter freewheel mechanism than the previous version. The size of the flanges has been reduced by 40% and the central body by 10%, compared to the previous generation, giving the wheel greater resistance with lower aerodynamic drag, without compromising torsional stiffness.

The bearings used in the Speed 42 and 57 are cup and cone and use the USB™ system (Ceramic Ultra Smooth Bearings) that provides unparalleled levels of smoothness.

The hub system uses an aircraft grade aluminium axle, which allows it to work with centesimal tolerances guaranteeing performance and durability.
Fulcrum wheels are designed for a specific use and function and therefore do not include additional adapters or spacers to be used with the axle, as can often be found in other products. This ensures an extremely solid system that always works with perfect alignment.

The ratchet system of the freewheel has been reinforced and increased in size so that now it houses 36 teeth. The wheel is available with Campagnolo N3W, Shimano HG and Sram XDR freewheel bodies.

The level of detail required to describe and list all the technologies and benefits of the new Speed 42 and Speed 57 wouldn’t fit in one press release.
What we wanted to do is convey the perfect ride feel that these wheels offer. Lightness, handling, aerodynamics and responsiveness have never been so well balanced, the result of the perfect synergy between form and function.

Tech specs

Speed 42

Tyre Type: 2-Way Fit™ tubeless

Rim Height: 42 mm

Rim width: inner 23 mm

Spokes: Aero, Straight-pull

Bearings: USB™ Ceramic

Weight: 1,410 g

Speed 57

Tyre type: 2-Way Fit™ tubeless

Rim height: 57 mm

Rim width: inner 23 mm

Spokes: Aero, Straight-pull

Bearings: USB™ Ceramic

Weight: 1,495 g

Combo 42/57

Tyre type: 2-Way Fit™ tubeless

Rim height: 42/57 mm

Rim width: inner 23 mm

Spokes: Aero, Straight-pull

Bearings: USB™ Ceramic

Weight: 1,460 g

The start of a new era

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