Arrma Granite 4x4 V3 550 Mega RTR Monster Truck w/Spektrum SLT3 2.4GHz RadioArrma Granite 4x4 V3 550 Mega RTR Monster Truck. Is one of the best beginner RC cars available on the market. The Arrma Granite Mega comes with a powerful 12T brushed motor and Mega ESC. The Granite is also one of the most durable RC trucks on the market making it great for kids or just people who are trying to learn about the hobby. The Granite is also very upgradable just in case you want to customize and add performance the Granite can accommodate.