My models are currently not available for sale through shapeways. I got rejections on 2 models which I did have successfully ordered in the past when somebody else bought them. This is happening to other designers, too, you can read more about that in the discussion forums. I don't have the resources to fix a model in a timely manner when it suddenly can't be printed any more (this is just a hobby for me) so I decided to remove the option to buy my models directly.
I have kept the download option, so you can still get the STL file from the model pages at shapeways, upload them as your own model (units are in millimeters) and order them there. If the model gets rejected try to fix it yourself, you can get the original SketchUp model files from the individual model page on my website.
I hope that shapeways will one day find a solution to this rejection problem, so that I can be sure all my models stay printable.
Warning: This model is very fragile. There is a protection cage around the bikes to protect them in shipping and initial handling, I broke many before I even tried to separate them. Please read the build instructions on my homepage and look at the pictures to see where to cut through the protection cage.
I have also created a matching bike rack.