Senior Member
Join Date: Dec 2009
Location: Denver area (Ken Caryl Valley)
Posts: 1,802
Bikes: 2022 Moots RCS, 2014 BMC SLR01 DA Mech, 2020 Santa Cruz Stigmata, Ibis Ripmo, Trek Top Fuel, Specialized Levo SL, Norco Bigfoot VLT
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While I cannot answer that question just yet, I also have a Roubaix frame like your current one. I just pulled the trigger on a 2009 Roubaix S-Works frame and will kit it with Ultegra. I think it will be lighter and stiffer. I don't know how much the Alu-carbon and full carbon frames weigh though I suspect the new full carbon frames are a bit lighter.