When you look at many bike friendly European cites, you will notice that most people bike to work in normal street clothes. To do this, you need a classic bike with fenders and a chain guard. The Schwinn Coffee was perfect for this except I didn't have a way to carry my computer. Instead of choosing the bike basket in the front, I went with a wooden crate in the back. This is perfect for carrying my computer as well as groceries from the farmers market. Here is how I did it.
Step 1: Reinforce Box
I found this box at a Goodwill and was probably intented to be used for decoration because the slats were held on using small staples. The first thing I had to do was to reinforce the slats that were used for attaching to the bike rack. I did this by using some small L brackets and 1/4" X 20 screws.
Next I added a couple more nails to the other slats to keep them from falling off. The two slats that attach to the bike rack really take all of the load.
Step 2: Attach Box to Bike With Hose Clamps.
To attach the box to the bike rack, I used stainless steel hose clamps. These have the advantage of conforming to the odd shapes and wont rust. I used two clamps on each side.
The first picture shows a top view.
The second picture shows the clamps from the bottom.
Step 3: Final Notes
The box works perfect for holding my laptop in a protective case and groceries. There are a couple of minor issues. First, since the box is so big, I need to swing my leg over the top tube rather than over the back tire. This takes a little stretching but you get used to it. I may cut the box down in the future to make this easier. Second the box puts a lot of weight high in the back of the bike. This causes the bike to be a little unstable. Third, there is a bit of a rattle. This is probably caused by the fact that the bike rack has a spring loaded mouse trap thing that is used to hold things down. In the future, I may change to a stronger bike rack. This should minimize the swinging and rattle.
Overall, the box adds a lot of functionality to the bike while still preserving the classic look. I am currently looking for a traditional dynamo light to complete the effect.