XTR on road cassettes, Sure... but is there a reason to?

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Testing out the latest Shimano Di2 XTR derailleur on road cassettes, it works... but is there a use case for it? Also trying out running the derailleur with a single spring, decreasing the chain tension... is there a use case for that?... probably not :P Chapters: 0:00 intro 0:45 Chain length for ro…