I've used this servo in my 1/8 buggy and now in my 1/10 Yeti (7.5lbs). It has no problem turning the wheels in either vehicle. Speed is actually pretty good too and much better than most rtr servos. It has a nice aluminum heatsink case but so far it hasn't gotten warm at all. I have run it with a Hobbywing sc8 and Castle SV2 and both esc's can power it with no problem from their internal bec. No brownouts or glitching. Servo uses a 25t spline like Futaba, Savox, etc. If the gears continue to hold up to my abusive driving style, then this servo is quite a good deal.