Main Gear Hub (Strenghthened Upgrade) Suitable for X7 / NX7 Series
The one-way main gear hub adopts the kingsbury-type thrust bearing to fit superior power output.
With excellent bearing efficiency and bearing operation life, becomes the top choice of all serious pilots.
ATTENTION: Very Important!
Use a stick as a tool, squeeze the grease into the bearing, make sure the needles of the one-way bearing is completely surrounded with grease.