GEPRC SpeedX2 2107.5 1960Kv is a quality motor for powerful 6S freestyle and racing copters. SpeedX2 bets on a less traditional stator size of 21/07.5mm. The bell is therefore a little narrower and higher. Thanks to the narrower, the bell has less inertia and better dynamics. It is advisable to combine high Kv with a lighter propeller. Like all high-end motors, the SpeedX2 uses strong N52H round magnets and 7075 aluminum alloy.