Originally Posted by
MileHighMark
A bike is "too heavy" if you can't carry it up stairs (and you must do so).
A bike is "too heavy" if, with the stock gearing, you're unable to climb the hills on your commuting route.
A bike is "too heavy" if you find that its weight prevents you from completing your commute in the time you have available (yes, that is entirely subjective).
A bike is "too heavy" if you find that its weight prevents you from enjoying your commute, and you commute strictly for "enjoyment."
^^This,
My first commuter was about 33 lbs. It was a great bike that helped eased me into cycling.
I soon wanted a little more performance and began riding for fitness. My bikes each now weigh less than 24 lbs, before racks or fenders. There is no real reason to haul around a bike much heavier than that, IMO.