RPM Rear A-arms for the ARRMA Big Rock, Senton & Granite 4x4s TRA2072X The Defender is a premium

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

Common bearing for steering assemblies and transmissions 5x8x2

The aggressive tread design and lug spacing release dirt and debris

Speed control and receiver are securely screwed to the chassis

100% brakes

RPM Rear A-arms for the ARRMA Big Rock, Senton & Granite 4x4s TRA2072X The Defender is a premiumSuper 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,