Salsa Warbird Carbon Frameset 52.5 BlackWarbird is Salsa's gravel race bike, built off years of experience racing in some of the nation's premier gravel events. It's 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 (sold separately) Class 5 vibration