story at BMW Motorrad is about to change big time from that of a shaft drive to
one of M Endurance Chain. For more than 90 years, the maintenance-free,
environmentally friendly and comfortable shaft drive has been one of BMW
Motorrad's immovable technical cornerstones. With the M Endurance chain, BMW
Motorrad now offers a maintenance-free chain with comparable characteristics
for the first time.
M Endurance chain in 525 pitch is now available initially for the two
4-cylinder models BMW S 1000 RR and S 1000 XR. The M Endurance chain is
available as accessory or directly from the factory as an option. Further BMW
Motorrad models are being prepared for this feature.
previous X-ring chains, the M Endurance chain has a resident permanent
lubricant filling between the rollers and pins, enclosed by X-rings. What is
completely new, however, is that the previously necessary additional lubricant
addition for the rollers and thus the familiar "chain lubrication" is
no longer necessary, nor is any re-tensioning required from time to time due to
the usual wear.
enormous gain in comfort was made possible by using a new coating material for
the rollers: tetrahedrally amorphous carbon (ta-C), also known as industrial
diamond. This coating is characterised by extreme hardness and resistance and
in this respect it is placed between the well-known DLC coating (Diamond Like
Carbon) and pure diamond. In contrast to the metal surfaces used so far, the
coating with the ta-C industrial diamond does not wear off. At the same time,
this type of coating also offers a drastically reduced friction coefficient.
to excellent dry lubrication properties and the elimination of wear, the
tetrahedral amorphous carbon coated rollers of the M Endurance chain offer
maintenance comfort equivalent to that of a shaft drive motorcycle. This
includes all the cleaning work that is unavoidable with a conventional chain
due to splashed lubricant. Accordingly, the M Endurance chain also offers
maximum environmental friendliness.
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