I just weighed my backpack, 10 lbs. Thats after I drank my 3 bottles of water and ate my lunch.

I carry my:

school book(s)
Folder(s)
lunch
water
2x tubes
mini pump
small toolkit
adjustable wrench
leatherman
clear and tinted safety glasses (bugs to eye = bad)
hammer gel
zip ties
electrical tape
spoke tool
lighter
replacement AAA batteries (for blinky)
replacement lithium 123a something or others (for phenix luxeon headlight)
some change (for payphone, dont have a cell phone)
cable lock (dont need anything heavy duty in my area, plus it gives me versatility since there arent many bike racks were a u lock would work)

So full with lunch and water it could be 15 lbs, and when I buy 2 40oz on the way home it could be 20.

BTW I use an animal bike co. backpack. i dont think they make it anymore. Its pretty much a hobo BMX riders dream (or mine since i cant stand racks/panniers).


But for some people who dont huck and jive while commuting, panniers are perfect for flat gound cruising at speed.

Just like any choice we make its about what we prefer and what makes more sense for our situiation/how you ride. I come from a bmx backround so i like to make use of my ability to hop, jump and slam through shortcuts and obstacles while never slowing down. Thats why i use a backpack