it is triangle shaped part that bolts to the front or rear hub to be used in addition to the Hudy system. It points to how many degrees of caster is in the car.
@FullSendRC804 I just purchased a send hand xray T4 and I'm trying to get everything sorted. It's my very fifst 1/10 scale touring car. I got a Zerun G4 21.5T and a Zerun XR10 Stock. This setup will not work with sensor cable connected. I've tried severing motor direction in the app and still. It does this weird kind of logging jumping motion when I try to give it throttle. This is with no load on the motor. I know I'm asking alot but is there any way I could contact You to send You a video showing what's happening?
@@raindeergames6104 Are the ESC and Motor new or used? It sounds like it might be cogging. If so, you should send it back to Hobbywing for them to check out. You might make sure the sensor cable is plugged in all the way.