This might be the best value aero bike on the market!! This is the same frameset that Biniam Girmay rides in the TDF. We are an authorised Cube Dealer. Here is what Cube have to say..... Rules are rules. A race bike needs to conform in order to qualify for UCI-sanctioned races. But designing a frame that's significantly more slippery through the air, without breaking the rules? That's completely legit. The Litening® AERO C:68X's lightweight carbon chassis – built with our premium C:68X® material – was designed with extensive use of Computer Fluid Dynamics and real-world wind tunnel testing. The result is a significant 30% reduction in drag, in a fully UCI-compliant frame that elegantly integrates fork, stem, handlebar and seatpost. But most of all, it's very, very fast.