Detroit Bikes is the largest bicycle frame manufacturer in the United States. If you are looking for a quality commuter bike with an American Made frame, you’ve come to the right place. Our US Made frames use a top of the line steel called Chromoly. Chromoly is exceptionally strong, so a frame made out of Chromoly can have very thin-walled tubing. This makes for a lightweight, yet strong and durable ride. Chromoly is also used in aircraft and race cars. Detroit Bikes offers various services to the bicycle industry.