DT Pro Head® nipples are designed for short spokes with a large angle of deflexion such as e-bikes. Through the spherical contact surface, the nipple aligns automatically with the angle of the spoke, which leads to a homogeneous power transmission. The special shape of the head prevents the nipple of tilting in the rim base, which is a great advantage for wheel building. They are available with or without the patented DT Pro Lock® locking system. Note: brass nipples are not approved for children’s products in the USA. See attached warning!