Andy is now confirmed as having riddden 541 miles in 24 hours. it's unlikely that any of us will ever have his talent or level of support, but what does his bike tell us?
It's a steel MTB type frame, with a triple and a long cage mech. He rides it for everything, as it has rack fittings, so there is never any riding he does that isn't preparing him for events.
He rides with his knees almost touching, so he needs that low top tube.
The bike is long, so he gets thrown about less.