Originally Posted by TRF415boy

I beg to differ, the whole point of the short arms isn't in the track width, but in the behaviour of the roll centre during cornering.

Shorter arms mean the roll centre drops faster and more when the suspension is compressed, but also that in a corner it moves sideways more. This changes the amount of grip in a corner and the way the car rolls more than anything else. I would tend to think that a car that doesn't roll much i.e. with very centered masses and low CoG) would need shorter arms to produce the same amount of grip. This is the main reason why the JRXS has such short arms...