Just to clarify, the requirements for biking a Camino are essentially the same as for walking. EXCEPT the required minimum distance is the FINAL 200 kilometers on any recognized / accepted route ending at the Cathedral in Santiago. That is the sole difference.
The requirement to have at least two sellos each day remains the same. So yes, you might be able to do two, consecutive “century” rides. Just make certain you obtain at least two sellos each day. I always recommend getting more than two if it is possible.
For reference, perhaps the most popular starting place for folks desiring to do a short, but qualifying (for the Compostela) bicycle Camino is to start at Ponferrada and follow the
Camino Frances. IIRC this is 229 km.
But, the other reason for starting from Ponferrada is because this small city has excellent train and bus connections. It also has a support infrastructure (shops and markets) to support bicycles. There is even a Decathlon sports superstore with a large bicycle repair shop inside.
There are other starting places to accomplish the minimum 200 km requirement. But, I defer to the other cyclists in the forum for an assist.
In closing, in the I streets of comity and safety, I IMPLORE all bicycle pilgrims to use the parallel road routes INSTEAD of the off road trails that walking pilgrims use. It might be of interest to note in passing that, for much of it’s length, the N-120 carretera is the paved-over original route of the classic
Camino Frances.
During the 1970s and 1980s, the present mostly off-road route was determined and marked to avoid the need for pedestrians using the road. So, while both routes cover the same daily starting and ending places, and while some of the off-road paths ARE the original path, a route that keeps both walking and cycling pilgrims separate almost all the time, is available.
This said, if you are going to cycle the Camino and you intend to share the paths and sendas with walking pilgrims PLEASE, PRETTY PLEASE, use a bell, whistle, or other LOUD signaling device to alert walking pilgrims BEFORE you overtake them.
Thank you.