A race bike can be UCI-compliant, comfortable, light and very, very slippery through the air too. The Litening C:68X Pro is proof. With its Computer Fluid Dynamics-designed chassis, æro-section Newmen Evolution wheelset and sleekly integrated Shimano Ultegra Di2 gears, you'll not find a more ærodynamically efficient bike in the peloton. A Comfort Flex seatpost and wider tyres keep things comfortable for the long haul. And powerful Shimano Ultegra hydraulic disc brakes ensure you can chase seconds on the descents, too.