My commuter bike, unladen, is about 27 LBS. Add the rack, pump, lights, tools, spares, etc... and the bike with 'fixed' gear is about 35. Add my panniers with a typical load (lunch, change of clothes, U-locks, rain gear, spare lights, spare spares, etc...) for another 15-20 lbs, for a total of around 50 lbs most days. Then add me at 190, and it hardly seems to matter.

This morning (for the first time evah!) I commuted on my 'sporty' bike, which, naked, weighs under 20 lbs, and is unburdened by rack or panniers, so the total bike weight (lights, pump, water bottle, computer, tools and spares etc...) might be 22-23 lbs.? (I'll have to remember to weigh it when I get home). I wore a backpack at around 12-14lbs (lunch, change of clothes, mini U-lock, some other stuff)? Unfortunately, I'm still about 190. I will admit, my average speed this morning was quite a bit faster than my norm, at about 15.5 MPH, instead of my usual 13.5. Total time today was 72 minutes for 19 miles, instead of closer to 82 minutes for the same. I'm really interested to see what it does for my ride home, which is usually even slower (it's more uphill).