Hey Adam,

16 gauge is the way to go for 12th, just like others have pointed out.

This is some very high quality wire used by the Guys at CRC, Donny Lia and many others.......http://www.tqracing.com/16%20gauge.htm

They also have killer sensor leads for brushless motors, by far the most flexible I have encountered and they have the insulation crimped as well as the wire so they are very durable......http://www.tqracing.com/sensor.htm

These products are also available from CRC at www.teamcrc.com

Mitch