The Hot Racing Traxxas TRX-4 Modular Rear Brass Metal Knuckle is a modular brass add on weight for the Hot Racing TRX-4 steering knuckles portal Gear Cover (steering blocks - HRATRX21HE). This will add weight to your TRX4 where it needs it - down low.

Features:

• CNC machined solid brass
• For more weight use TRXF21HWF
• Adds 47 g to each knuckle