RPM Rear A-arms for the ARRMA Big Rock, Senton & Granite 4x4s TRA2072X 100% brakes

100% brakes

Optional gyro unit set (MZW446) can be installed

Traxxas EZ-Set one-button setup

The Defender is a premium TRX4 rig with great fit and finish

RPM Rear A-arms for the ARRMA Big Rock, Senton & Granite 4x4s TRA2072X 100% brakesSuper tough RPM rear arms that fit many Arrma 3s and Mega vehicles. RPM A arms for the 4x4 versions of the Granite, Senton & Big Rock are the answer to the questions you didn't know you had. Are you looking for more adjustability? Check! How about better durability? Got that covered too. How about lightweight? Yup, no problem! Adjustability: We've added a second shock mount to both our front and rear A arms to the outside of the stock shock mount,