Specialized updated the Roubaix SL3 for 2011, making it one of the smoothest and fastest bike on the market. The goal of the design was to make sure that jarring and vibration over uneven roads and rough roads will not be experienced by the rider.
To make this possible, the Zertz elastomer inserts were placed mechanically in the seatstays unlike before. This damping gives about 6mm degree of flex. The frame becomes more stiff and durable when the inserts were pressed onto it.
There is a new stay molding with one bladder on each leg with a new shape for the stays. The stays are now 3D and it trickles from the dropouts to the seat tube for additional side-to-side stability.
Overall stiffness is made possible with the one-piece top tube/head tube/down tube mold used on the Tarmac SL3. For power transfer, Specialized used Press-In bearings, which in turn no longer requires internal alloy inserts and a tube junction.
The 2011 Specialized Roubaix SL3 features internal cable routing, weighs less than 1000g and comes in Pro and Expert models.