Siren Cycles has started building with titanium, and first up is this hardtail mountain bike frame dubbed Sinatra.
Actually, Sinatra is simply build #1 and is already claimed. The frame is simply called Ti Siren and can be built up pretty much any way you like…like with sliding dropouts as shown here.
The bike is 100% handmade in the U.S.A. from all U.S. materials, and as much of it is as local to their California HQ as possible. Even the cardboard box is sourced from the U.S.
The frame is here is modeled after their John Henry with the curved top tube and hourglass seatstays.
Check more photos after the break…