Our new line of aluminum and brass option parts for the Element Enduro TrailrunnerKnightrunner will help add weight to beneficial areas of your rig to improve stability and climbing performance while increasing durability. The brass Front Lower Bulkhead adds nearly 40 grams of weight to the lowest part of the front transmission while the solid CNC Machined Aluminum Lower A-Arms adds durability and weight to improve both the looks and performance of your Trailrunner or Knightrunner.