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 .
Like 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 .
This 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 characterized 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 .
Thanks 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 .
The 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 .
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