Originally Posted by Paul Braithwait
The large diameter down tube has meant that the QR racks will not fit but I will be using a Carradice SQR seat pack which attaches to a bracket which clamps to the seat tube.
I've found when fitting it to a Bike Friday seatpost (28.6mm) I have to slightly widen the metal clips which hold the plastic mount. No biggie, just tap the top with a hammer a few taps. I assume the Swift's seatpost is just as wide if not wider?
I have checked and if I mount it just below the saddle the seat tube will still slide down when the bike is folded and hold the package together enough for me to put it in my car.
Depending on the seat (much worse if you're using a sprung Brooks saddle), you might want to test fit the whole SQR system with the bag first, as I've found that if you mount the plastic block too high, you can't install or remove the seat bag because it will collide with the seat.