Many features of Cervélo’s top-end aero road bike the S5 have trickled down to the 2014 S3, and geometry is the most important one. The S2, Cervélo’s 2013 mid-level aero road frame, is built upon geometry designed for high-level road cyclists. Many triathletes can match its fit scheme, but situating the bike for triathlon is a challenge. The new S3 inherits the S5’s more conservative geometry. For a given stack height, the reach length is shorter, which not only helps road fit for many riders, but also makes the bike more adaptable for double-duty as a tri bike with clip-on aerobars. Other changes include a broader lower headset bearing, thin seatstays, Cervélo’s bottle-specific downtube shape and internal routing that can be set with either mechanical or electronic drivetrains.