Redcat Racing BS803-027 Ring (43T), Pinion (13T), and Spider Gears
Works with these models ONLY: AFTERSHOCK 3.0,AFTERSHOCK 3.5,AFTERSHOCK 8E,BACKDRAFT 3.5,BACKDRAFT 8E,CALDERA 10E,CALDERA 3.0,CALDERA SC 10E,CALDERA XB 10E,EARTHQUAKE 3.0,EARTHQUAKE 3.5,EARTHQUAKE 8E,GROUND POUNDER