The name that can be spoken is not the Eternal Name
You start off with getting yourself into a basic bicycling meditation.
When your breathing is feeling like it is flowing naturally, and your body is relaxed and working smoothly on the bicycle, you can stay there as long as you like — and you can chose to begin the next part of the meditation if and when you're ready.
This meditation uses a name of God — Yod Hay Vav Hay. You know, when you open up a typical bible, and it says "The Lord"? Well, guess what. In the original, it doesn't say "The Lord" in Hebrew. Instead, it's four letters that represents something that could be more accurately translated as "Tao", or "Ultimate Reality". These four letters you can see in the box to your right. These letters are said Yod Hay Vav Hay in Hebrew (rather than wye atch vee atch if it were written in English). These letters don't spell a word you can really pronounce. There are no vowels in it. Try saying the sounds of these consonants anyway. It sounds like breathing in and out. Just think — you are saying a name for ultimate reality with every breath that comes in and out!
So here's how to tie it in to your cycling. You have a choice — you can focus on your breathing for this part of the meditation, or you can focus on your pedaling. If you've done the first part of this meditation, to get you relaxed on the bike, you may have a sense of which focus is working better for you: pedaling or breathing.
If you are focusing on your breathing while pedaling, then before you start your in-breath, that's YOD. Then, as you breathe in, that's HAY. When you are at the peak of the breath, that VAV, and then as you let the breath out again, that's the next HAY. Each breath is another YOD-HAY-VAV-HAY.
As you first get into the regular feeling of each YOD-HAY-VAV-HAY cycle you might be pedaling so slowly you'd think you'd fall right over! You can pick up the pace a bit more once you've worked it through enough times that it is feeling regular and natural. Working it through seated first, before taking it on the bike can help, too.
If you are focusing on your pedaling, than each half rotation of the pedals is one of the letters. I do right foot on YOD coming down, left foot on HAY, then right food on VAV, left foot on HAY again. You may pedal slowly at first as you get used to the focus, but then you can pick up the pace as it feels more comfortable. For me, focusing on the pedaling sends the energy outward. So after I get into the groove of YOD-HAY-VAV-HAY as the pedals go around and around, I visualize a trail of YOD-HAY-VAV-HAY being left behind me as I go along. This is a nice stream of positive energy that anyone can pick up who uses the road or trail behind you — even you, the next time you're on that route!
I've experimented with trying to do the pedal focus while doing the breathing focus. I found that in order to even begin to track it, I have to be at a pace where the pedaling and the breathing are in the rhythm of one complete rotation of the pedals with each breath. Even with this coordination, it's too much for me — there's no way I can really pay attention to traffic at the same time, much less also maintain a meditative consciousness. However, some people are able to do all sorts of things in meditation, so if you try this and it works for you, please let me know about your experience.