The XR247 Axle Kit with pre-assembled front and rear trussed axles. These axles feature iIntegrated heavy-duty double-sheer mounting points, integrated trusses, steel internal axle tube inserts, diamond shaped pumpkins, CNC aluminum spools, one piece pinion gear and a 2.91:1 gear ratio. These axles are a welcomed upgrade to many shaft driven crawlers and rock racers out there.