so i was on the new randal website(looks promising) and they were saying that trucks, when given the same baseplate angle, do notturn more or less with hanger width. it just affects the amount the hanger has to travel so a narrow hanger gets a quicker turn but not more turn. its nice to see randal is shaping up.
http://www.randal.com/images/faq/HangerWidthTurnComp.B.1.jpg