The 3922X Brake Drum from Accuride Corporation's Gunite brand is a 105-lb. cast-iron brake drum suited for outboard drum mounting. Measuring at 16.50" in brake surface diameter and 7.60" in brake surface width, the brake drum features 10 bolt holes and designed to work with a disc wheel type. Able to replace the Accuride 3922X-018 and several other OEM brake drums, the 3922X is now offered domestically in the U.S.