Brompton is coming out with their own toolkit (dunno when). It looks really nice, but it will likely be a costly little set.
Inspired by the forthcoming Brompton kit, I pieced together an impromptu toolset. Admittedly, it lacks a crescent wrench to remove the front wheel, but it’s a start and I’ll update if/when I figure out where to stash a small adjustable wrench.
First, I snaked a replacement inner tube into the long top tube. The inner tube is curved, mimicking the shape of the top tube so it’s a pretty easy fit. The schrader valve makes for a good handle and the tube comes out without hassles.
It turns out that the Pedros Hex Set plus Screwdrivers fits in the front part of the top tube along with one tire lever. Be sure to put the hex set in first with the fat end pointing towards the head tube. Then use the tire lever as a wedge to hold the wrench in place. (The piece of inner tube or rubber band wrapped around the tire lever provides some padding and stops the duo from falling out when the bike is folded).
The zefal pump that came with my bike is basically worthless–I was never able to get more than a few psi with that thing. So I got a Lezyne Road Drive pump, which I housed in the seat post. (Some inner tube wrapped around the end helps keep it firmly in place).
With tire, levers, hex- & screwdrivers, and a pump, I’m ready for almost anything. Now, how about that crescent wrench?
Update: I simply slid a 5/8″ wrench in with the inner tube and now I’m all set. Also, if you pick up the Lezyne pump, be sure to get the one with the Schrader and Presta (rather than the Presta/Slip fittings that come standars with that pump — both of those fittings are actually Presta). I contacted Lezyne and they sent me a free replacement hose for free, which was super nice of them (great customer service as well).
All of the tools laid out: