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Ikea's UPPTÄCKA briefcase retails for $19.99. This instructable shows how to make a detachable bicycle mount for it with a few bolts and washers and a coathanger. You can hang your briefcase on your bike's rear rack while you ride, and pop it off and go once you arrive.

Step 1: Ingredients

Parts:
UPPTÄCKA briefcase
1 standard wire coathanger 

Mounting hardware: (see step 3 for images)
2 mounting machine screws or bolts around 3/4 inch long and about 3/8ths thick, with nuts
4 lock washers - preferably the spiny kind that grip into whatever the bolt is compressing 
4 large fender washers
2 nylon spacers, about the thickness of your coathanger wire (you could probably substitute a stack of small metal washers instead)

Tools: 
Big pliers for bending coathanger
a drill
screwdriver, for tightening mounting bolts
<p>Great idea! Thanks for the inspiration. I just used your method to make a lunchbox pannier.... http://www.instructables.com/id/Lunchbox-Pannier/#step0</p>
Have you tried orienting the bags the other way, so that the long edge follows the seat stays? I think it would look better though it might not change the performance of them or balance of them in any detectable way.
Yes - a good thought, and one worth trying out. In fact it might make weight distribution a little better. In the current configuration I can definitely feel a difference when turning -- it's significant, but not so bad that it's hard to compensate for. Positioning the bag lengthwise would get the center of gravity closer to the axle, so it would probably help with that. The thing is, the bag is set up to open horizontally, with internal straps that keep the contents from dumping out, so it's easier to get stuff in and out of it while mounted in a relatively horizontal position.
Hey Lightnin9,<br> <br> That looks great !<br> <br> Another option for someone not as skilled as you in coathangery is to use pannier hooks (ebay &pound;6 )<br> <br> <br>
Great idea. I've seen some DIY pages where people just made long (several inches) hooks from flat metal stock, rounded the ends to prevent snagging other items, and bolted them to bags or cannisters.
Woah, awesome! I had no idea such a thing existed. (Might not look quite as nice on the bag, but that doesn't matter so much. This would make installation easier. <br>Thanks for the tip!
great idea, love re purposing even the new. water is a concern but nothing a spray for the day or clear coating wouldnt solve.
Actually it seems to be pretty waterproof - at least when it's been rained on. I'll report again the next time I ride through a deluge. (I think that underneath the fiber looking exterior, there's a hard, non porous plastic shell).
Looks like a big Lego - that's awesome!

About This Instructable

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Bio: I develop tinkering activities that invite people to experience and reflect on creativity and learning through play. Previously I ran the Scratch online community in ... More »
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