... servo 3. 15KG metal throttle servo 4. alloy diff. gear set 5, 98% alloy parts Scale 1:51,Displacement 30.5cc ... (F/R):570mm7,Rear wheel drive8,Rear disc. Brake9,15KG full metal gear throttle servo10,40KG metal gear steering servo11,Upgraded ... dominator exhaust pipe12, CNC alloy diff. gear set13,full terrain tyres sets ( with CNC alloy hub)14,CNC 8mm ...