Hi!

Thank you very much for all tips!. I always drive without using brakes (I setting hard drag brake in ESC), but there are some corners where you HAVE to use brakes.
I'm sure that my rear axle is centered but I'll check it again.
BTW, I think that it could be a setup/tweak problem because it's very strange that spins always to the same side (under hard braking).

Cheers!