Republic Aristotle Bike
The Republic Aristotle single speed is on this list for those of you who want the freedom of customization. The Republic website has a super-cool 3-D design feature for you to customize your bike and view it in 3-D. Most of us think customization comes with a long wait, however, according to Republic, the bikes go from custom to built in about 5 days. The Aristotle's steel frame is available in a number of sizes, including an extra-small. You will also find a women's version of this single speed.