.Welcome to GroupJ Engineering’s website.  Here you will find everything you need to convert a steel frame, or round tube carbon frame, bicycle into a world travel bike by adding GroupJ Bicycle Frame Couplings, (BFCs), which allow you to "fold" the bike into a airline legal case for travel.  This site is designed to provide the amateur and professional bike builder with all the tools and information needed for frame conversion or new bike design.  At GroupJ we are all avid cyclist, and are here to make your project a success and your ride experience memorable.  Please Contact Us with any questions.

Please visit our Blog page to see our latest product developments.  Your comments to our blog are most welcome - please share your thoughts.

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