The Premium line of bikes from Pure Fix proudly feature 4130 chromoly frames and forks for a ride that is quick, nimble and forgiving. They're also double butted to bring the weight down a good bit. All bearings are sealed, so your hubs, headset and bottom bracket are protected against the elements. These fixies also rock light, double-walled aluminum rims that are 30mm deep, laced 3-cross, and wrapped with fat slicks. They're fast and tough, so potholes and rough roads are not a concern. The rear flip-flop hub goes from fixed to freewheel in minutes, so ride it fixie or casually coast. Either way, the front brake has your back.