Salsa Warbird Carbon Frameset 52.5 BlackSalsa Warbird Carbon Frameset 52. 5 Black. Warbird is Salsas gravel race bike built off years of experience racing in some of the nations premier gravel events. Its designed to survive and thrive on anything from the often hazardous B roads that make up much of the Midwest gravel scene to the fire roads that climb to the heavens on the coasts. High modulus carbon frame with rear thru axle dropouts and rear rack compatibility via Rack Lock seat collar