Bicycle designed to fold to a size of an umbrella


Foldable bikes have been in great demand recently for its portability and lightweight, but Italian designer Gianluca Sada has pushed the boundaries of cutting edge bike design by creating a bicycle that can be folded to the size of an umbrella. The Sada Bike is a hubless bike featuring a frame that folds away for maximum portability.

Regular foldable bikes come with large wheels and limited portability, or super compact but with very small wheels – either of which often hinders the biking comfort levels. In an attempt to address this issue, the Sada bike utilizes standard bicycle dimension with 26-inch spokeless wheels that are attached to the frame using an anchoring system that allows you to fold the bike efficiently, using its special package that is like a trendy backpack.

“The starting point of this research is the study of art that starts from an overview of the urban individual mobility to reach, then, the folding bicycle.” explains Gianluca Sada. He adds, “Some studies have been done about characteristics of both components of frame and wheels to analyse their behaviour during the application of loads (interference and FEM analysis). In conclusion, the project may pave the way for a new system of mobility outside the classical schemes, widely accessible and easily transportable. Personal style and extreme versatility give dynamism to the traditional bicycle, the subject increasingly required in this environmentally friendly age.”

The design definitely seems to address the portability issue, but its performance still remains questionable. Why? While traditional bikes get their strength from the tension created in the spokes, the Sada bike puts all the tension on the rims, which simply adds mass to the outside wheel. Still in prototype phase, Gianluca is seeking funding to further develop the design and manufacture a light weight and high performance foldable city bike or to put in the designers words, a bike that is “Elegantly simple, simply innovative”.






Sada Bike


7 Responses to “Bicycle designed to fold to a size of an umbrella”
  1. The frame folds to the size of an umbrella but those wheels are still the same size of more than 2 feet across. Also the gearing on this bike will be excessively low as the effective gear will be for the tiny wheel driving the rear wheel, unless there is some kind of overdrive gear box inside that tiny wheel. This bike was designed around a single parameter with little to no thought given to making an actual useful (as opposed to “ridable”) bicycle.

  2. Andy Clarke says:

    Amazing. How much? And do you need a UK distributor?

  3. Raven says:

    My main concerns with this come from the hubless design. They have none of the traditional bike wheels designed rigidity – how will they stand up to actual city riding? Potholes, kerb bumping, drains, bad surfaces, etc., will put enormous strain on those rims.

    Also, the drivetrain looks extremely close to the ground at the rear. How far can you lean the bike without scraping the drivetrain along the floor? Considering the way all bikes turn, that is an element that really needs to be looked at.

    Overall I do like the design but there are a huge number of possible failure points in this model. If the designer would take advice, I’d say give the prototype to a cycle courier for a month and see how long it lasts, and the condition it’s in when it’s returned :)

  4. Sten says:

    Yes, very nice design with the umbrella but where do you stuff the wheels? Sorry but it´s flawed.

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