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Moulton ®
Dr. Alex Moulton, noted automobile designer, was also a cyclist and bicycle designer/manufacturer. He was an early pioneer in the development of fully-suspended bicycles. The original Moulton bicycles of the 1960's had 16 x 1 3/8" (ISO 349 mm) wheels. The small wheels reduce unsprung weight, reduce the overall size of the bicycle, and allow luggage to be carried lower, lowering the center of gravity. The 349 mm size was originally a juvenile size, and the fairly wide, low-pressure tires limited the performance of the early Moultons. Later models, currently known as "Alex Moultons" or "AMs" use a slightly larger diameter tire/rim (ISO 369 / 17 x 1 1/4) developed specifically to Moulton's requirements.
Early Moultons used a simple cross frame of large-diameter steel tubing, with a reinforcing strut for the seat tube. The current "AM" series uses a very elaborate "space frame", consisting of a network of many pieces of small-diameter steel tubing, lined together into a truss made up of many small triangles. AM models are designed to separate into two roughly equal-sized pieces for ease of transport. There is also an "APB" model with 406 mm (20") wheels.
