Oh that's a downside - what kind of special esc and why will it be required?
You will need a special brushless ESC to run it. Normal brushed ESC's are completly different.
I really don't know if those numbers are any good or not, but if it is like the SS4300, it will perform about like a 19-turn brushed motor.
http://www.rcuniverse.com/magazine/a...article_id=505