Hey S-dog, I saw someone on a ride yesterday with a tiny underseat bag hanging upside down from her stem. It looked like it fit there just fine, no interference anywhere. Guess you just need a med-longish stem for it to work. And since it zipped, nothing could fall out. The velcro straps that would normally go around the seatpost were put around the headset, and the straps that would go on the saddle went around the stem.