The axle still looks like an unremarkable pedal axle. It seems possible something out there would fit. There's unfortunately no standard. With this thing only in production for two years about ten years ago, it's kind of an esoteric question now
__________________
Genesis 49:16-17
"Well, well!" said Holmes, impatiently. "A good cyclist does not need a high road. The moor is intersected with paths and the moon is at the full."