Giant's Bowery Mashup combines courier features with aerodynamic rims and a flat handlebar for added comfort and speed. Its aluminum frame and chromoly fork provide a light, fast and responsive ride, and the flip/flop rear hub can easily be switched from a track-style fixie to a singlespeed freewheel. And, the Kenda Kriterium tires are 25mm wide, which is narrow enough for low-rolling resistance, yet wide enough for good traction and puncture resistance.