Model # 1

This bike is not just a replica, it is a completely re-thinking of Mikael Pedersen's design.
Fons op het Roodt Website
Maker and owner Fons op het Roodt, Industrial designer (NL),
Dutch Pedersen Genootschap member.
Photos and text courtesy © Fons op het Roodt.
In Dutch, when you say "DX11" it sounds like: "I did it myself".
So, the name is just a joke.

I ride it every day (when it's not raining!).
The first time I saw a Pedersen was an article in the German design-magazine FORM back in the nineties. This was my bike! So when I decided to build my own bike for the sitting position it had to be a Pedersen-like.
The start of the bike was my medical and ergonomic interest in the sitting position on a bike.

It's a long story and the short version is that the next best to walking is a straight up position on a bike. By moving the pedals in the design backwards, you address the back forces from the pedal force straight into your body. By doing that there is no lost energy during biking, as long as you stay in the low range of energy-input. Up to 20-23Km/h works fine.

Enlarge photo (61 kb)
It is very true to the original first drawings, when you disregard the saddle. The front-fork is turned 180 degrees. I think it looks just right. (Editors remark)

Stainless steel tubes 12mmx1.5mm
15Kg including umbrella. (Weight was never an issue, ease of building (suchs as welding) is more important for a first model).
Homemade 11 gears in the back [11/32], one sprocket in front [one grip shift].
Combined hydraulic brakes from Magura on one handle, tested on ice for safety.
Rubber suspension in front. The lower triangle of the frame bends during suspension. It has a small travel just for comfort.
26" mountain bike wheels from Shimano with wide slick tires.
Homemade wooden fenders.

The design was entirely made on the sitting position with just the photo in the magazine in mind. I started with stainless steel tubes 12mmx1.5mm and ideas about brakes, gears and suspension.

The theory was that in an upright position you could bike with one hand because you don't need to bring reaction forces to the handle bar. Therefore I looked to solutions for one hand. In practice this works very well.
I didn't want to use the saddle technique of the Pedersen. I think different about it. In my opinion it needs more comfort and more movement sideways. So I used an normally saddle with rubber suspension in the back and polyester flex tubes in front of the saddle. Now the saddle can move and rotate with my hips in any direction but not forwards and backwards.
Adjusting it to my weight and length was the hardest part of all.

There is a future.
For my girlfriend I plan a Pedersen with 20" wheels and electric drive-assistance. To solve the problems of girls-closing the saddle must be lowered during stops so you can walk over it from behind. In that way I hope to overcome the problems of the necessary flex tubes in front of the saddle.

For myself I like to redo my own design in a lightweight-form made from carbon tubes and aircraft aluminum.

Manufactors: Royston (Roy) Sutton and his son, Shaun.

Photos courtesy of © Geoff Butterworth, owner. You might notice the former owner's name, a neighbour of the Suttons, is also stamped in the head badge).


Manufactor Mikael Kemper

Kemper Fahrradtechnik
Not much on the Kemper Pedersen, more to come - I hope.

Inspired by the book (The Competion Bicycle) of Mr Jan Heine we have cloned the Pedersen Racer as ridden by Anders Mellerup.
This bike is actually made as a custom bike, tailored to the customers leg lenghts and in a equipment single speed or 3-speed.

Maker: Jesper Sølling. Note: Jesper Sølling no longer manufacture his Pedersen.

This is a medium size bicycle. As you can see the saddle here is a modern saddle with a nylon-strap and a leather seat. The connection between the rear-end of the saddle and the chainstay is a rod studding.
This bicycle is spray coated.

Photo courtesy Lars Andersen.

Very nice looking model assembled by "Christiania Bicycles".
This is a "Chopper" model, the frontfork is extended.
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Photo courtesy Lars Andersen

Again a "Chopper" assembled by "Christiania Bicycles".
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Photo courtesy Lars Andersen

It's a little bit difficult to see that it has wooden fenders.

Cardan machine

Jesper Sølling has made a few of these machines - without any chain.

Triplet Copenhagen Pedersen

Photo courtesy Jesper Sølling.

Needlees to commenton this - machine. The brakes are not operated by wires, but uses oil to press the brakes.

Knock down Model

Photo courtesy Jesper Sølling.

It's called a knock down model because the frame is assemblet with bolts and not moulded. If you look carefully on this machine, you can see the bolt heads that holds the tubes to the bottom bracket.

Ladies Model

Photo courtesy Jesper Sølling.

He's not happy to make them cause Ladies are not that easy to make :-) As far as I can remember this bicycle Jesper Sølling made for his daugther.

Ladies (in raw format).

Photo courtesy Jesper Sølling.

Manufacturer: Individual Bicycles Ltd. in Cheltenham, England, (30 miles from the original Pedersen factory).




SPECIFICATIONS (above bicycle): Owner Philip Thornton
Frame: Stoved enamel Reynolds 531 lightweight tubing, 26" wheel for a inside leg of 26-31" with a seat suspension adjustment of 5"
Freewheel: Sturmey Archer 5 Speed Hub
Gear levers: Shimano Deore XT / Handlebars: SR 1046
Stem: Shimano AX 100mm
Chain: Sedisport /
Seat and Strap: High quality saddle leather
Suspension: Stainless steel cable and adjuster
Brakes: Weinmann 999.
C.P. levers: Weinmann 135
Hubs: Maillard Normandy L.F.
Rims: Super Champion 58
Tires: Nutrak Marathon
Mudguards: Esge Chromosplatic
Pedals: S.R.
Weight: 28 lbs./12.5 kilos



Erling Andersen, Denmark, made his Pedersens, just for the fun of it.
This is a Mountain-bike model.


Notice the very steep front fork and the short distance between the wheels.
The seat is made the Dursley Pedersen way, although all leather.

Another bike by Erling Andersen:


Photos courtesy Thorfinn ?


The Great American Bicycle Wheeze July/August 1986

Text and Photos by © Jonathan Lloyd. Jonathan Lloyd and cousin Simon Merrony on their way to Gallup, New Mexico.

Jonathan Lloyd outside a Schwinn shop showing the two Cheltenham Pedersens that he and his cousin Simon Merrony used to cross the United States.

Simon Merrony (left) and Jonathan Lloyd (right) with their two Cheltenham Pedersens and the little girl of one of the many generous Americans who made their trip across the United States such a wonderful experience.

An idea of where you're going to be tomorrow and where you came from yesterday.
Simon Merrony desperately looking for ways to lighten up on his load.

My Cheltenham Pedersen
Notice the racing position for the handlebars on the front fork structure.