Originally Posted by Six jours

Bear in mind that a typical spoke weighs about 5 grams, more or less. A typical brass nipple weighs about a gram. So if you went from an "old school" 32 spoke set-up to a cool and up-to-date 20 spoke wheel, you could figure on saving about 84 grams, or about 3 ounces. In other words, the last splash of water left in the bottom of your water bottle.

That's not to try to talk you out of it, but rather to limit your idea of how much benefit you are actually going to see. Of course, if you think a 20 spoke wheel is going to be super keen, then it probably will be, at least for you. Just as long as you're not hoping to see objective improvement, 20 spokes should keep you and your "getting around" bicycle off the ground just fine.