Bicycles

Kwiggle Bike claims world’s most compact folding bike crown

Kwiggle Bike claims world’s mo...
The Kwiggle Bike folds down to a compact package
The Kwiggle Bike folds down to a compact package
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The Kwiggle Bike ready for riding
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The Kwiggle Bike ready for riding
The folding process starts by lowering the seat
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The folding process starts by lowering the seat
The patented hinge is central to the Kwiggle Bike's design
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The patented hinge is central to the Kwiggle Bike's design
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The Kwiggle Bike's frame is folded in half
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The Kwiggle Bike's frame is folded in half
The seat is folded over the handlebars
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The seat is folded over the handlebars
The handlebars and seat are folded down once mode
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The handlebars and seat are folded down once mode
The Kwiggle Bike folds down to a compact package
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The Kwiggle Bike folds down to a compact package
The Kwiggle Bike in compact form
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The Kwiggle Bike in compact form
Removing the pedals completes the process
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Removing the pedals completes the process
The patented hinge that enables the bike's folding capabilities
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The patented hinge that enables the bike's folding capabilities
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Putting the drive cog on the outside of the frame is another feature that allows the Kwiggle Bike to fold
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Putting the drive cog on the outside of the frame is another feature that allows the Kwiggle Bike to fold
The Kwiggle Bike's seat that is meant for leaning rather than sitting
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The Kwiggle Bike's seat that is meant for leaning rather than sitting
The Kwiggle Bike seat and handlebars
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The Kwiggle Bike seat and handlebars
The patented hing at the center of the Kwiggle Bike frame
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The patented hing at the center of the Kwiggle Bike frame
View gallery - 16 images

One of the main goals for anyone designing a folding bike is to make the bike as compact as possible so it's easier to carry and store when not in use. Karstin Bettin from Hannover, Germany has ticked that box with his Kwiggle Bike. Bettin claims the Kwiggle Bike, which is the result of four years of development, is the most compact folding bike in the world.

The Kwiggle Bike, which Bettin is showing at Eurobike 2013, is an exercise in minimalism that makes use of a number of patented design elements that allow it to fold down to a compact package. Chief among these are a special hinge that enables the bike’s contortionist-like folding capabilities and the placement of the drive cog on the outside of the frame, which allows for greater folding capabilities by keeping the chain out of the way.

Even though the Kwiggle does have a seat, this is more for leaning on than sitting on as the bike puts the rider in an upright position. The “wiggle” in Kwiggle comes from the side-to-side movement of the seat as the rider pedals, which Bettin claims provides a more comfortable ride than a rigid seat would. The bike can support riders weighing up to 100 kg (220 lb).

The Kwiggle Bike ready for riding
The Kwiggle Bike ready for riding

Despite the upright “seating” position, Bettin claims it is easy to get the bike up to speeds of 25 km/h (15.5 mph), with each revolution of the pedals translating to 4.5 m (14.7 ft) of development. That’s for the single-speed prototype Bettin has on show at Eurobike, but he is working on a model that would have two to six gears and produce 7.5 m (24 ft) of development for each pedal rotation.

The prototype on show at Eurobike rides on 8-inch wheels and folds down to a size of 50 x 40 x 25 cm (19.6 x 15.7 x 9.8 in), which makes it small enough to fit in hand luggage for carrying on a plane. Constructed from aluminum, Bettin also aims to get the weight down from the prototype’s 8 kg (17.6 lb) to 6 kg for the production model.

Bettin also has a model with larger 14-inch wheels in the works, which will fold down to a maximum size of 55 x 40 x 25 cm (21.6 x 15.7 x 9.8 in), although he is aiming to get it even smaller than this. Bettin points out that the production models will also have brakes, which is something the prototype lacked.

Bettin is hoping to release the Kwiggle Bike before the end of the year. Pricing details are still to be ironed out.

Source: Kwiggle Bike

View gallery - 16 images
11 comments
BigGoofyGuy
I think that is ingenius. I wish I had that when I visit New York City. It would make getting around a whole lot easier.
Freyr Gunnar
I'm curious to know how it fares, because I returned the A-bike after giving it a short ride: It was just too unstable with wheels the same size as the Kwiggle Bike. http://en.wikipedia.org/wiki/A-bike
nehopsa
It is even dangerous to bike around with such small wheels: all it takes is one very small pothole ...and you go flying. It is rough ride, shaky, unstable... I do not think it would be practical even for N.Y. (The potholes there ...I know since I had to lug luggage around after 9/11) ...the wheels are the limiting factors to practicality of a folding bike. I had a 16" and gave up on it. Then I hat two 20" ....and it was still just too shaky and rough. Only Montague paratroopers folding bike with 26" wheels finally made me happy.
Sam Sams
Progress, but what I'm really after is a two-second self-inflating bicycle that has full-size wheels, weighs 500g, and fits in my breast pocket. Alternatively a folding bike that's as clever as a few folding fans and goes in a small pocket. But the ideal solution would be a token I can keep in my wallet that swaps itself out for a bike held in store via teleport whenever needed.
Bash Prompt
It looks absolutely ridiculous. Only a tockley would be caught dead on that thing.
detrbear
I agree that the tiny wheels would be unstable. My Yikebike with a tiny back wheel never feels stable. How about a video of someone actually riding the Kwiggle?
duh3000
I agree with Bash Prompt: ridiculous ! Never mind what who might ride it... without any triangulation in the frame, "the 'wiggle' in Kwiggle" will make it unrideable !
WorldTravel
This will NOT fit as a carry-on on most airlines. Check your airline's website. You will probably be VERRRRY disappointed. I am sick of so many folding bike manufacturers lying & telling that it will fit as a carry-on. The only size that you should count on is 9x14x22 (inches) & some small planes won't even allow that.
Glen Aldridge
Brompton's can be carried on flights. I was amazed to see this 6 foot tall passenger ride up to the terminal, get off his Brompton, proceed to fold it all up, tuck it under his arm & check in for his flight. Walked right through security with it.
unklmurray
The guy that rode up on the Brompton and folded it up and walked through security with it probably had the confidence to make it look like it was the totally natural thing for him to be doing.....most of the time if you go up to the security area showing your intimidation you will get harassed every time,If you walk around scared the cops will pick up on your vibes[we can smell your fear]and will use it to intimidate you.......although I have never flown on a commercial airlines,I fly my own airplane......and so I don't go through security........LOL