This is an optional Traxxas TRX4M Axle Cover (Blue).
Add high-tech style to your TRX-4M™ with these aluminum axle covers. Made from tough 6061-T6 aluminum, the axle covers look great and add valuable weight to the lowest part of your TRX-4M for improved anti-rollover stability and superior rock-climbing capability. Includes 1.6x12 mm screws (8).
