Fulcrum Speed 55 DB


The new rim profile characterizing the Speed 55 DB is a further step forwards in the search for the best aerodynamic performance. The model therefore focuses on a demanding and “racing” audience. To improve the rolling resistance (and ultimately the speed) of the wheel/tyre system, we designed this model in the 2-WAY FIT version.

In stock

SKU: 0146726SC21 Categories: ,
The manufacturing process of the carbon fibre rim without holes in the internal channel – a patented construction technology – also allows a stronger and sturdier construction capable of withstanding even the most extreme racing conditions.  The rim with a 19 mm inner width perfectly matches recent trends of using increasingly wider tyres – a choice that further improves the aerodynamic performance of the wheel/tyre system. This data has been validated by intensive wind tunnel studies and trials where new projects are tested on a regular basis. SPEED 55 DB proved to be the best option in terms of aerodynamic penetration indexes in the Fulcrum range and is derived from the profiles developed for the tubular version used by World Tour teams. The SPEED range not only responds in terms of aerodynamic performance. Optimizing performance also requires the wheels to be light and run smooth. The scale stops at 1580 gr and we have chosen to add ceramic USB bearing components.


Tyre Type2-Way fit (for clincher and tubeless)
Tyre Size28″
DisciplineRoad / Triathlon
ASTM Category2
Weight1580 g
Rim MaterialCarbon
Rim Material DetailsFull carbon, “UD” – carbon fiber finishing
Profile HeightDeep Section
Rim HeightFront and rear: 55 mm
Rim Width26.5 mm
Inner Rim Width (Channel)19 mm
Tyre WidthFrom 23 mm to 50 mm
Braking SystemDisc brake
Braking Surface/Brakes OptionsAFS
Front Axle CompatibilityHH12-100
Rear Axle CompatibilityHH12-142
Front Wheel Spokes21, Two-to-one (14 left – 7 right)
Rear Wheel Spokes21, Two-to-one (7 left – 14 right)
Spokes: MaterialStainless steel, double butted
Spokes: ProfileRounded
Front HubCarbon, Oversized Aluminium flange
Rear HubAluminum, Oversized Aluminium flange
BearingsUSB ceramic bearings. Adjustable Cup & Cones system
OthersPlasma treated HG freewheel. Aluminum Axle
Weight Limit120kg (bike, rider, equipment and luggage)
FWB OptionsHG11, Campy, XDr



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