Bladed spokes on drive side, regular on other side Yesterday, I checked out a Cannondale Synapse with Mavic Aksium wheels. One strange detail caught my eye - the rear wheel had bladed spokes on the drive side, and regular, cylindrical spokes on the non-drive side.

Is this a feature or did the shopkeeper mess around with the wheels?
Your first, and possibly best, place to start researching is the Cannondale website.  It appears that 2 models of the Synapse, the Synapse Carbon Disc Ultegra and Synapse Carbon Disc Ultegra DI2 come standard with Mavic Aksium Disc wheels.  You could then refer to the Mavic website to get the specs on those.