The lack of a road BB30 arm is certainly odd- as Skinny says I would think that you could use the MTB one, although I'd check Q factor before ordering.
Otherwise, again as Skinny goes on to say you might have to use an adapter to run a GXP crankset, but that seems to be a very backward thing to have to do.
Had you considered buying a Power2Max instead?
In other news, I've just placed an order for an Ultegra 6800 Stages.
The lack of a road BB30 arm is certainly odd- as Skinny says I would think that you could use the MTB one, although I'd check Q factor before ordering.
Otherwise, again as Skinny goes on to say you might have to use an adapter to run a GXP crankset, but that seems to be a very backward thing to have to do.
Had you considered buying a Power2Max instead?
In other news, I've just placed an order for an Ultegra 6800 Stages.