
Bicycles are obviously a green solution that do the world no harm, but designers still haven’t managed to create something that will convince people to choose as a daily commuter for short distances (instead of a car). However, the Contortionist Folding Bike from Dominic Hargreaves is set to break the jinx for it is a full size bike with 26-inch wheels and can all be rolled up without being too clunky.
The design student from Royal College of Art London has succeeded in creating a design that could soon be on the production floor for such is the appeal of his innovation. He used pivots in the frame and a lockable universal joint in the front fork which together let the bicycle roll up to the width of a single wheel thus making it ultra-compact.
The material usage is high quality as Dominic has used aluminum frames with chunky mountain bike tires and a unique design scheme where the front and rear wheel are slightly misaligned to make folding easier. Even when folded up the wheels rotate freely making it easy to be carried around.
Another very unique feature is the deduction of chains for an internal hydraulic system that uses oil pumped through tubes in the frame to spin the back wheel.
This design has been shortlisted for the Dyson award and could be soon rolled off the production floor with a $675 price tag as Dominic is already in talks with production partners.
[via Guardian]
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2 Responses to “Contortionist Foldable Bike from Dominic Hargreaves”
I have a Montague Swissbike folding bike. Although it may be a bit heavier, it is a sturdy full-sized bike. This Contortionist doesn’t seem to be sturdy, and there are so many steps in getting the bike folded and unfolded. It’s not practical when you want to just quickly unfold and store your bike, or in turn quickly unfold it and ride. My Swissbike LX is still number one in my eyes.
The video is deceptive because (1) you never see the crank being turned, (2) the left side crank is not shown being removed to fold the frame or attached while deploying the frame for use, (3) the right side crank swings limply while the bike is being folded which implies that there are no hydraulics inside the frame, and (4) the brakes, front and rear, don’t work.
The crank is supposed to use a “hydraulic system” to turn the rear wheel, but I don’t see gear teeth along the inside or side of the rear rim. How is power transferred from the hydraulics to the rim? I would hope that it’s not merely by friction.
There doesn’t seem to be any means of activating the brakes.
Each hinge is a weak point in the frame, and that frame has four hinges. Don’t forget the hinge in the single tine front fork.
That is bike more a design school project than an alpha version prototype of a product.
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