

An innovative crankset!
The Bemor® crankset is a crankset for riders looking for optimal power transfer and cutting-edge equipment.
By analyzing the cranksets on the market, we discovered that few of them took into account the twisting effect of the cranks under pedaling stress. Competing cranksets focus everything on the vertical rigidity of the cranks. But the first force to which a crankset is subjected is a twisting force. Indeed, the end of the cranks tends to twist under the effect of pedaling. It is no exaggeration to say that during a start, these constraints are enormous. This phenomenon misaligns the foot, reduces the quality of power transfer, and can also destabilize in compressions. In the long run, the cranks undergo a stress effect that reduces their overall rigidity.
Traditional high-end cranksets rely on so-called "hollowtech" technology, i.e. having hollow cranks to reduce weight and maintain maximum rigidity. However, this technology alone does not effectively counteract torsional forces.
At Bemor® we have decided not to close the rear part of the cranks and to reorganize the material thus saved in the form of a honeycomb structure that effectively connects the three remaining faces. This structure is well known among engineering firms for offering an extremely efficient ratio: quantity of material/resistance. This solution increases both vertical rigidity, torsional resistance and lateral rigidity. Even in the event of a fall, the cranks will be much more difficult to twist than with a traditionally designed crankset.
On the edge, the cranks have a triangular shape. The upper and lower walls are oversized at the axle to gradually taper towards the pedal axle. This choice is not only a question of design, because it also offers a gain in lateral rigidity and resistance to torsion.
The open back of the cranks allows them to be manufactured by cold forging. Cold forging is known to significantly increase the mechanical properties of metals. This is called work hardening. During compression, estimated at several tens of tons, the metal takes the desired shape and improves its internal arrangement in the form of oriented fibers. This arrangement within the atoms themselves provides a significant increase in the elastic limit and hardness of the alloy. The gain in mechanical resistance can reach 300% of the basic properties in the best cases.
Finally, since work hardening tends to make materials more brittle, i.e. which do not support deformation well, the cranks undergo a heat treatment intended to reduce fragility and increase the plastic deformation limit of the alloy. This gives the best of both worlds.
About the axle. We decided to stick with a chrome/molybdenum steel alloy for the comfort and dynamism of the bike when going over bumps. The axle is able to twist slightly in order to absorb vibrations and make the feet more stable on the pedals, and a more tolerant general behavior of the bike.
Additional data:
Important notes:
Our components are made from high-end materials to ensure optimal strength and performance for the practice of Race BMX while respecting constraints beyond the official standard in force: NF EN 14781. However, the components are not indestructible, like any other high-end equipment, it is your duty to know your own limits and to ensure the maintenance of your equipment. Our products are guaranteed for 5 years against all hidden defects and manufacturing defects that have escaped our vigilance. If you damage your equipment by using it inappropriately, or by damaging it following a shock, caused by sharp objects, by twisting, compression, a fall, an abnormal impact and other actions beyond the control of Bemor®, the warranty cannot apply.