Coincidentally I'm currently Reading Sir Ranulph Fiennes autobiography at the moment, and tbh I can't see her making it to the pole, not least on that bike.
It mentions she will also be walking & kite-skiing.
From what I have read there are parts of the terrain that are only passable on foot, but by harnessing the power of the wind it's possible to make signifficant headway.
I don't see how it's possible to do the whole journey on a bike, unless it was a monster truck sized one lol.