Cervelo R3 started the aero road bike genre, and they’re still very much at the forefront with the R3. The latest evolution of the species is spectacular in terms of raw aggression and savage speed.The S5 is said to be more aero (92g less drag, for an equivalent of 9w savings; wattage savings jump to up to 32w when compared to a non-aero-tubed bike), lighter (by 80g; claimed weight 990g) and stiffer than the S3 it self a market-leading bike and it's the latter property that makes itself felt first.
2012 Cervelo R3 Rival Bike