Best for Triathlons: BMC Timemachine TMR01 Ultegra Di2

The TMR01 is built for speed. Virtually every component is integrated within the sleek carbon frame (brakes, electronic Di2 system, etc.) to minimize drag. These clean lines are complemented by wind curbs molded to help you slice through the air, whether you're driving the breakaway or sprinting for the finish. [$10,000; bmc-racing.com]