According to foreign media new atlas, in the past few days, motorcycle riders needed to become half qualified mechanics in order to reliably get to where they were going. In the past few decades, this has changed so much that many riders do not need to install a wrench in their vehicles to pass. But there are still chains. Chains still need occasional cleaning and lubrication, and as they wear and stretch, they still need to adjust their tightness. If these basic maintenance are ignored, it may lead to chain failure, which will become a safety issue. Now, BMW says it has solved these problems, < / P > < p > it is well known that the BMW M endurance chain uses an industrial diamond coating to achieve “extremely high hardness and resistance”. BMW says it doesn’t wear, and it “dramatically” reduces the friction coefficient at the interface between the roller and the sprocket teeth, as well as the friction coefficient with the bushing around the pin shaft of the fixed link, which also gets a & quot; tetrahedral amorphous carbon (ta-C) & quot;, an industrial diamond coating. < / P > < p > there is also a rubber X-shaped sealing ring between the inner and outer chain plates, which is probably to prevent the sand and gravel from entering the road. However, since the M endurance chain does not need viscous lubricating oil, the road sand and gravel will hardly adhere to the chain. < / P > < p > at present, BMW offers them to its S1000RR and s1000xr bicycles at 525 intervals as factory options and after-sales accessories. “More BMW Motorrad models,” the press release said, “are preparing for this feature.”. There is no information on whether the M endurance chain is suitable for non BMW bicycles. < / P > < p > although BMW did not provide official pricing in its press release, the Motorcycles.News The retail price of the chain alone is 286.08 euro (about 2335 yuan), and the retail price of the set including chain wheel and other small parts is 425.59 euro (about 3473.8 yuan). SpaceX beat blue origin and Northrop Grumman to win a $316 million air force contract