Poll: The toughest motorcycle race on earth is...

Six laps of a 37.73 mile circuit at speeds approaching 200mph? A 5000 mile marathon over rock, sand and every other surface imaginable? 24 hours of flat out neck and neck racing on a GP circuit? A one day battle against 1500 other offroaders and the fearsome Iron Giant? There's many contenders for the title of 'toughest biking event' from ...

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