It's fine. However strong your legs are you will not put down as much stress as the braking force a 50mph 40lb DH bike will. If you don't buy cheap [read crap] cogs and a get a good hub; you'll be fine.
@Tenners started
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It's fine. However strong your legs are you will not put down as much stress as the braking force a 50mph 40lb DH bike will. If you don't buy cheap [read crap] cogs and a get a good hub; you'll be fine.