If you want to play with the physics of bikes, take a peek at "Bicycling Science" by David G. Wilson. I haven't gotten far enough into it to see what he says about wheels, but the book is very cool. Sno-Isle libraries has it. You can always interloan it if you can't find it.

There's a physical therapy book about bikes and riders and the kinesiology of the whole shebang, but for the life of me I can't remember the title right now. That would focus more on how the wheel effects the body of the rider.

Off to Amazon to search for the title of the PT book....