LRP release a new optional StockSpec sintered rotor for the X12 Stock Spec motor designed for the usage of 1S LiPo. Art. no.: 50639 Availability:

The new sintered rotor is a tuning option for everyone who uses the successful X12 Stock Spec brushless motor in an 1/12th chassis with 1S LiPo for example. The new 12.25mm sintered 1S StockSpec rotor will boost the efficiency and power performance of your brushless motor to a completely new level!