It's a great idea, but you can also make it out of royal icing and combine some small parts with fondant or gum paste. Pipe them out let it dry for 1 day and put it together.
Bicycle cake More
Bicycle Cake from cupcakes...I remember when I made the hubby a bike cake!
Bike cycling cake for boys.
Chocolate Bicycle | Flickr - Photo Sharing!
How to royal icing bike on a cake. #taart
Tour de France racing cake with course map.
cycling cake More