The ConMet TruCast Brake Drums, Nos. 10030774, 10080275 and 10080287, are designed to ensure optimum braking performance for heavy duty truck and trailer applications. At 116 lbs, the 16.5” by 8.625” version (No. 10080287) is 9 lbs lighter than a standard cast drum and features a maximum GAWR of 23,000 lbs. The 16.5” by 7” drum (No. 10030774), with a maximum GAWR of 27,000 lbs, weighs 106 pounds, and the 16.5" by 7" drum (No. 10080275) has a maximum GAWR of 27,000 and weighs 111 lbs. All three are 100-percent balanced for vibration-free operation and tested to meet FMVSS and OEM standards, according to the company.