Luggage My Brompton

New T Frame Mod

Basil can never have too many bags, right?  I own a slew of Brompton bicycle bags (well, three, and the Brompton “basket”), and have made quite a few, too.  Each has its place, but no one is perfect, and there’s always a new idea to play with.

I started with a T bag frame.

This time around, I wanted bag that was as tall as a Brompton T bag, but smaller, narrower, and closed all around with a zipper. So I took the T bag frame apart, leaving only the center section (which I promptly forgot to photograph just after the destruction).

Then I bent 1/2 inch copper tubing into a more-or-less pear-like shape (well, half a pear, anyway).

Once one side was done, I traced the shape onto cardboard, so that I had a fighting chance of replicating it for the other side of the frame.

This sort of thing is much better done in a workshop rather than on a kitchen floor. I managed to pull a muscle in the process of bracing the tubing, and didn’t get the sides perfectly symmetrical. “Hand made” has its flaws.

Then I stuffed each newly-bent side into the T frame.  The resulting bag frame is not perfect, but it will do.   The frame is not substantially less wide at the top than the original T frame, which is what I had in mind, but it is so at the bottom.  Without tools, I wasn’t able to bend both ends as drastically as I would have preferred.

It will do, though. Now all I need is the bag.

(For those new to Brompton bags, each clips to a luggage block on the Brompton bicycle frame.  In most cases, the luggage slips onto a removable inner frame, like the ones above, which have the mate to the luggage block built into the back side of the lower frame.  This allows one frame to support a variety of bags — and also allows for a a lot of amateur experimentation.)