Unfortunatly I dont have a Timbuk2 bag to stuff inside of it, A quick test fit allowed me to put a binder (big, hefty 3 ring one) along with a laptop, a hoodie, and a pair of Size 15 shoe's into the metro and I could put it on comftorably.




I dont know If those Pics help you but the top one is a picture of a standard helmut ontop of the Metro bag and the second pic is the citizen ontop of the metro