The beauty on the left is an S3 used in the Olympics by an ITU triathlete. Notice the stub aerobars. This bike looks very similar to the now named S2 (or the SLC-SL of 2008). What is different? That is what the next picture zeroes in on (which is also the S3 in a black and gray frame). The rear triangle incorporates a chain stay which is more aero and beefier than the SLC-SL. Cervelo states that beefy is a side-effect; they are going for aerodynamics. The seat stays are very similar in functional capability to the R series bicycle. So Cervelo states that this bike is as stiff as the SLC-SL (now the S2) but is more aerodynamic and also more comfortable a ride. That is a big deal. We have not test ridden this but Cervelo is pretty good at giving you what they say they will. But we will have some in stock shortly which we will test ride. The S3 is actually slightly heavier than the S2, but the 30 grams or so difference is, according to Cervelo, more than made up for by the superior aerodynamics of the rear triangle.
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