Can no one answer this very basic question ?, perhaps I need to explain why I have /or a perspective of the ...I'm sure, a dumb ass Q. I' ve only dealt with motors from 27 turns to the lower no.eg 15 turns 12 turn etc. I have just taken out the drill motor out of my slightly hopped piece of ...t buggy, turned sermi-crawler truck and replaced it with a somewhat ,apparently more torque orientated motor ,being a 55 turn RC4wd branded, and found it to perform like a complete let down.?, and I'm thinking I might not be able to use an esc that I used for a21 to say,.. 15 t motor ,which mind u is not exactly a new one but before I jump the gun and accept that maybe after 7 years its just to old, that maybe it's just wrong for the application, either way it would explain a lot because so far I've replaced everything but the vehicle itself , which I do admit will have to be done but (5 kids !!!? ,my noose is pretty tight),so does a rock crawler motor require a specific ESC for more than 27 turn???? and.... HEY!! new guy 6 gears, BET u have plenty of knowledge as variety is a great teacher. thanks 4 reading from roly down under ..zero flame character.love it all!