Velocite Helios stiffness data

As promised, here is the stiffness data for the Velocite Helios frame. Three samples were tested by the factory test machines for deflection in the head tube and bottom bracket areas.

The bottom bracket stiffness is constant across sizes, while the head tube stiffness varies according to size. The heaviest frame, size XL, weighs 1115g with bottom bracket guide, full coating of clear lacquer and uncut ISP mast.

The values below represent averages.


Test area

Result (N/mm)

Bottom Bracket


Head Tube



Here are comparative stiffness results for some other frames, as found by Google.



Bottom bracket (N/mm)

Head tube (N/mm)

Cervelo R3 167
Look 595 Ultra 185 120
Look 595 170 100
Look 585 Ultra 180 115
Look 585 165 95
Storck Fascenario 0.8 
Scott Addict SL  86
Specialized Roubaix 85
Cannondale Super Six 93


With these results, please keep in mind that I do not know how they were measured and when.