Progressive aerodynamic technology that gives low drag and high crosswind stability the 40mm deep rim with a 25mm wide profile is elliptical in shape to offer low drag at a very low weight extremely light weighing in at just 555g monobloc full carbon construction can be found throughout the wheel including the rims spokes and hubs the stiffest carbon wheel tyre system on the market the 40 mm deep rim profile lack of spoke drilling and 100 carbon spokes make the wheel feel stiff and respon