Dual Box or DualBox is the name for the tubular sidewall inline skating frame, which employs the mechanical properties of the tubular to optimize the performance of a frame or chassis that secures the wheels on an inline skate (a critical component of high performance skates). Designed in 1999 by

Dutch Dutch commonly refers to: * Something of, from, or related to the Netherlands * Dutch people () * Dutch language () Dutch may also refer to: Places * Dutch, West Virginia, a community in the United States * Pennsylvania Dutch Country People E ...

Design Engineer

Diederik Hol Diederik Hol (born 10 April 1972) is a Dutch Design Engineer, designer of the Dual Box inline skate frame and the Narrow Shape Cross-Section (NSX) ice blade, and founder/director of skate company CadoMotus Skating BV. Education and early caree ...

at Mogema, the Dual Box design was devised to optimize the elastic properties of inline skate frames (which the skater interprets as stiffness and feel, and contribute greatly to ride quality and power transmission) via the properties of the tubular sidewalls to enhance rigidity. The Dual Box design successfully eliminates the need for horizontal cross-bracing in inline skate frames, and provided progressive flexural feel for the skater rather than the isolated areas of varying stiffness which were inherent to many, more traditional double-void

extrusion Extrusion is a process used to create objects of a fixed cross-sectional profile by pushing material through a die of the desired cross-section. Its two main advantages over other manufacturing processes are its ability to create very complex c ...

frames. Through a product partnership with the Mogema company, the

Rollerblade Rollerblade is a brand of inline skates owned by Nordica, part of the Tecnica Group of Giavera del Montello, Treviso, Italy. The company was started by Scott Olson (b. 1960), Brennan Olson (b. 1964) and Christopher Middlebrook in Minneapolis a ...

professional racing team debuted the Dual Box frame to the world in 2001 after which time team athletes rode Dual Box frames across the finish line first in numerous Swiss Inline Cup,

World Inline Cup The World Inline Cup is the leading competition in inline speed skating. History In 1999 first attempts in order to establish a racing series with standardized evaluation system and rules were made. The then called ''European Inline Cup'' was manag ...

and World Championship events. During this time the Dual Box became one of the most recognized and successful frame designs in

speed skating Speed skating is a competitive form of ice skating in which the competitors racing, race each other in travelling a certain distance on Ice skate, skates. Types of speed skating are long track speed skating, short track speed skating, and marath ...

, with 45 athletes winning their Gold, Silver and bronze medals at the 2001 World Speed Skating Championship on the frames. Since 2003, the Rollerblade company has produced Dual Box frames under

licence A license (or licence) is an official permission or permit to do, use, or own something (as well as the document of that permission or permit). A license is granted by a party (licensor) to another party (licensee) as an element of an agreeme ...

from Mogema and has specified Dual Box technology in their high-performance skate product lines. Today, following the dissolution of Mogema in 2006, Dual Box designer Diederik Hol's own company CadoMotus produces its own skating frames based on an evolution of the Dual Box tubular sidewall.

References

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External links

CadoMotus website

Swiss Inline Cup (in German)

World Cup of Inline Racing

Fédération Internationale de Roller Sports
Roller skating equipment Roller skates Dutch inventions