4*21.7mmThickenedsteel axles,overall durability increased by 100% compared to the original
21T/17T portal Reduction Gears,Greater torque
The stock one is plastic separation type, easy to loosen, and has poor rigidity. We use Hard-anodized colour,CNC machined PTFE-coated hardened alloy 6061-T6, which has better rigidity and precision,uncorroded,sturdy and durable