> What is in the nature of bike-riding that cannot be reduced to text?

You're asking someone to answer this question in a text forum. This is not quite the gotcha you think it is.

The distinction between "knowing" and "putting into language" is a rich source of epistemological debate going back to Plato and is still widely regarded to represent a particularly difficult philosophical conundrum. I don't see how you can make this claim with so much certainty.