Use for T-REX 550E PRO.
Brand new M1 motor helical pinion with Stainless steel material. This high strength and high rigidity characteristics can help to increase wear resistance and longevity.
Must with 550E PRO Motor Mount(H55B002XXW), 550E PRO Carbon Fiber Main Frame-2.0mm(H55B003XXW), 730MX Brushless Motor(850KV)(HML73M01)

* Motor Pinion Helical Gear 16T x 1
* M4 set screw x 2(M4x4mm)