Depends on what you mean by help.Does it really help that much on a DH bike?
It just keeps things quiet, calm and controlled......on ANY bike. It really is badass. Just think of any problem or noise you ever had from a chain flopping around......that doesn't exist anymore. And the shimano system is notably better than the sram one (mostly just because of the shifters). That's from a guy who bought nothing but sram derailleurs for about a decade.
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