SUMAX INNOVATION 2207 2450KV Brushless Motor

..... It sheds the heavier construction of the previous 2206 motor in favor of a design with all the modern bells and whistles. This is one of the lightest 2207 motors to cross the bench, coming in just barely under 30g with 40mm of 20ga wire. The build quality is quite good, with tight tolerances, a tight air-gap, and high quality machining. The windings are neat and tight single wire winds. The wire gauge isn't as thick as some of the other single wire winds I've seen, but is fairly typical for the application. There are a couple of concerns that jump out at me related to the weight savings on this motor. The base of this design uses very thin metal where the mount screws are tapped. This increases the likelihood of both the screws stripping out the threads, and the mount points breaking under stress. The other point of concern is the lack of a lip on the flux ring on the bottom side of the bell. With a high torque baseless design motor, this of particular concern. Those points are fairly minor and may not prove to be major issues in practice though, and this motor hits all the other points without issue. The light weight will likely prove an offset to the risks for pilots looking to shave those last few grams from a 2207 build.....
**Quoted from Mini Quad Test Bench