Misinformation.


Yes, a 540 will have less torque than a 550....but he didn't ask about torque.

a 4.5T 540 will be faster than a 4.5T 550 running the same gearing and same voltage (assuming that you are not overgeared to the point of overloading the motor)

From novak's own chart....

The 4.5T 540 is a 9000kv motor.
The 4.5T 550 is a 5000kv motor and the 4.5T 550 with the High Torque rotor is 3850kv.

The 540 is nearly 2x faster than the 550 when using the same batteries, same gearing.

Where the caveat comes in, is that you generally have to gear a 540 much lower than a comparable 550 so that it doesn't overheat...even with fans...because it is not suited for heavy 4x4 trucks. The SC104x4 is twice as heavy as the touring cars and 1/10th scale buggies that 4.5T 540s are typically intended for....