The frame used a triangulated frame of small diameter tubing rods which were soft soldered together and plated inside and out. The triangle is a very strong and very stabile geometric figure. Mikael Pedersen got the idea from the Whipple-Murphy bridge construction where strength and lightness were desired.
This was what Mikael Pedersen wanted to obtain, lightness, strength and stability.
The frame was made of 14 separate narrow diameter tubing rods, joined in 57 places, making 21 triangles throughout the bicycle. Regardless of the low weight of material of the bicycle it is strong enough to support a man of 14.28 stones (90 kg).
The construction of the frame is so strong that Mikael Pedersen was able to build a bicycle in wood only (Must be a kind of prototype). This special bicycle is displayed at the City Museum of Copenhagen.
The first frames were not adjustable, only the seat (back and forth). Due to customers complains, Mikael Pedersen later altered the construction so the seat could be adjusted vertically.
Later still the bicycle was produced in eight different sizes for men and three different sizes for ladies.
The very first frames that were produced, were lighter than 19.84 pounds (9 kg), lighter than contemporary bicycles. Later fabrications were a bit heavier, actually the frame got more and more heavy in time.