I'd say it's to do with the fact the wheels are heavily steel reinforced
That begs the question of why didn't they just use spoked wheels? It doesn't weigh much more than a tandem, and the gear will be towed anyway - the wheels don't need to be that strong.
Or maybe it's to do with thin flexy spokes becoming brittle at really low temperatures. A solid wheel is less likely to flex, therefore less likely to break.
That begs the question of why didn't they just use spoked wheels? It doesn't weigh much more than a tandem, and the gear will be towed anyway - the wheels don't need to be that strong.
Or maybe it's to do with thin flexy spokes becoming brittle at really low temperatures. A solid wheel is less likely to flex, therefore less likely to break.