Instruction:
- Use for T-REX 550E PRO.
- rand 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)A550E PRO Carbon Fiber Main Frame-2.0mm(H55B003XXW)A730MX Brushless Motor(850KV)(HML73M01)

Specification:
- Motor Pinion Helical Gear 16T x 1
- M4 set screw x 2