I have a whole chapter on cycling the Camino in my book - Your Camino on foot, bicycle and horseback. I can't send you all 14 pages but here is some info that might help you to plan.
Guides
The Cycling Pilgrim on the Camino Francés: John Curtin 2007. Advice on bicycles, loading, and kit, prepared by cyclists, with information on means of getting bicycles to and from Spain, and some route suggestions for touring bikes away from the walkers’ route.
The Way of St James: Le Puy to Santiago – A cyclist’s Guide: John Higginson. 1997. Covers the entire French and Spanish route.
http://www.cicerone.co.uk
A Practical Guide for Pilgrims: The Road to Santiago: Millán Bravo Lozano (Everest). A guide for walkers with a section for cyclists with stages, profiles and route descriptions.
3-in-One: Three Great Bike Trails –
Camino Frances, Aragones
and Via de La Plata.
http://www.mundicamino.com
Camino Frances: Road Cycling Guide: In Spanish, but easy to use, the first guide path for cyclists. Mapping at 75 000 ° with GPS integration. The guide is aimed at both bikers and beginners who want to avoid the difficult sections.
Mapswww.bikemap.net/route/139920
http://www.esterbauer.com/ From the Pyrenees to Santiago de Compostela
Jakobs-Radweg (Bike Path). The total length of the
Camino de Santiago – bike trail is 914 km. Variations and excursions are not included.
Forum:
For more information and a good place to ask questions of experienced bikers, join the Yahoo Bike forum:
http://groups.yahoo.com/group/Santiago_Bicicleta/
Camino Frances:
http://homepage.mac.com/verbier7/index.htm
http://www.caminocycle2006.com/
http://www.gaerlan.com/others2/camino/camino.htm
http://caminodesantiagobybike.blogspot.com/
http://www.interam.com/camino/indexeng.htm
Roscoff (France) to Santiago: layte.com/index.html
Uk to Santiago: buchaneers7.wordpress.com/
Via de la Plata:
http://www.viaplata.eu/
Via Podiensis:
http://www.crazyguyonabike.com/
French Routes to Spain: vtt.compostelle.pagesperso-orange.fr/accueil.htm
General bike webs:
http://www.bikeweb.org/ru_camino.htm
General Camino cycle site:
http://www.amigosdelciclismo.com
homepage.mac.com/verbier7/home.htm
http://www.caminhodesantiago.com/bici3.htm
Comparing the daily stages in the diaries above it is possible to plan your 8-, 10- or 12-day cycling camino.
Good luck!