hmmmmmm it looks like you could possibly order that crank with a 52 outer and 24 inner, but I would think that would not be such a good idea. With a difference that great in the rings shifting would be a real bear... you'd really be pulling hard to get the chain up from the small ring to the big one and when you shifted down the drop would be so big that you'd probably drop your chain a lot... I'm looking around for the biggest suggested difference between inner and outer rings.