Originally Posted by
patk
Ah, the transcend is a thicker bag than the baseline. My baseline is like 8.5" thick. Even packed for 5 days, I measured it for my trip this week and it was only 9" (without expanding). Take a look at the B&R site between the u421 and the U521 and you can see that the 521 is thicker.
So just to confirm, you measured the bag INCLUDING the external frame and it's a true 9" thick? If so, that sounds like the ticket!