Salsa Cowbell Carbon Drop Handlebar - 31.8mm Clamp 42cm Width Carbon BlackSalsa Cowbell Carbon Drop Handlebar Carbon 31. 8mm 42cm Black. Cowbell Carbon blends speed comfort and efficiency for high performance efforts on gravel and paved roads. Designed with gravel racing and riding in mind Cowbell Carbon bars feature a 12 degree flare that puts your hands wrists and arms into a natural comfortable position in the drops. Unidirectional carbon fiber construction with new carbon layup to better accommodate the clamping forces