The Soloist name has been around for years, but the latest version is a bit different than what the World Tour Pros of the early 2000s were riding. The current iteration is all about balance for those only looking to have a do-it-all performance machine. Lighter than the S5, more aero than the R5, the Soloist sits right in the middle of those two heavy hitters. It also accommodates both electronic and cable drivetrains, opening up the doors for whatever build your heart desires.