Cervelo Aspero-5 Gravel Disc*Please Call To Check For Sizes, Colour & Build* FLAT OUT Our engineers like to joke that, "if it looks fast, it probably is." But theres some truth to that, and spero 5 looks fast standing still. No cables in the wind, tube shapes from our aerodynamically proven library, and a hint of a cut out in the seat tube, all add up to a bike that proves the adage.