The manufacturer BMB from the USA made a start with a very short and very high stem: The raised position is said to position the arms at a better angle to the handlebars, which provides more control and speed. With very flat steering angles, the stem tilted backwards also helps to prevent the front wheel from bending. The distance between the feet and hands is increased with the BMB stem and this increases the leverage when maneuvering.

An ultra-short stem is also produced by Rulezman, a suspension tuning specialist from Italy. In a YouTube clip lasting over half an hour, Rulezman creator Dave Cerutti explains the physics of a very short stem. This much can be revealed: The concept has advantages, but can only play its trump cards if the bike has longer chainstays and therefore a longer wheelbase than is usual today. 

So it's not just a new stem that's needed, but a new bike for the new geo concept. This could therefore be very interesting for the bike industry.