Some reasons why "Fixies" are a vital piece of equipment for life in an urban lifestyleare they are very lighweight and portable. That akes it easier to turn corners or walk down subway stairs carrying the bike on your shoulder. There are a lack of stealable parts unlike a mountain bike with quick release wheels. You are able to lock your bike anywhere without having to worry about it. The coolest part of Fixies are that they are completelty customizeable. There are websites where they give you a blank bike and if you roll over a part with your mouse, a bunch of colors appear and you can choose whatever color combinations you want to make it perfect for your style. You can also go to specialty stores and buy all of the seperate parts and build it yourself if you're that kind of person.