Some brush rock crawler motor specs:-
Voltage 7.2 and all rpm's unloaded.
35 Turn 13,000
45 Turn 9,500
55 Turn 7,700
65 Turn 5,500
If you divide the voltage by rpm, you will get a brushless KV rating.
e.g. 5,500 divided by 7.2 equals about 750KV.
Type D :- 35mm max rpm 10,000
40mm max rpm 8,800
45mm max rpm 7,800
50mm max rpm 7,000
55mm max rpm 6,400
60mm max rpm 5,800
ESC I use the Hobbywing Quicrun 60 Amp for 2-3S lipo.
These have link set up for Lipo and NIMH batteries.
The other link is for Foward/Brake/Reverse.
On boats set to Forward/ Reverse.
This is the only ESC I found that goes straight from Forward into Reverse !!!!