Fulcrum Speed 40C Wheelset Road 28" Clincher Shimano USB Black

Features technology used in pro tours. The maximum uphill, the maximum downhill – the Fulcrum Speed 40C is the current benchmark for wheels with medium-high rim profiles.

Momag
No drilling in the rim bed: this means a uniform rim throughout without critical points or breakages, and for clincher profiles no rim tape is necessary, which has a positive effect on the weight.
The advantages are immediately apparent: longer rim life, greater strength, the possibility of tightening the spokes and higher stiffness; in terms of performance, this means higher reactivity and better acceleration.

Anti-rotation system
Fulcrum engineers have redesigned the spokes and hub housings to create a strong and solid unit. This way, the spokes never lose their initial tension and the wheel remains responsive and perfectly centred. The spokes also remain in the position developed in the wind tunnel to ensure the best possible aerodynamics.

2:1 Two-To-One
At the moment when the rider pedals with full force, the rotation of the sprocket package causes the spokes on the freewheel to give way and the rim to lose tension. This causes an excessive bending of the whole wheel and inevitably means a loss of energy. Fulcrum has solved this classic problem with its patented Two-to-One Spoke Ratio, which doubles the number of spokes in critical areas.

USB ceramic bearings
The hubs with USB (Ultra Smooth Bearings) ceramic bearings further increase the smoothness of the wheels and reduce weight and maintenance.

Plasma freewheel
The plasma treatment makes the aluminium particularly hard and resistant to abrasion and surface wear. This made it possible to reduce material thicknesses to a minimum, all to the advantage of weight, while maintaining durability and reliability.