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Not a big fan of road bikes, but the new 2015 Specialized Tarmac is gorgeous. The attentions to details is amazing.http://www.bicycling.com/sites/default/files/images/2015-specialized-s-works-tarmac-side.jpghttp://www.bicycling.com/sites/default/files/fck_content/tarmac-head-tube-comparisson.jpegThe bike is a first for Specialized, and perhaps in the bike industry—a single model with distinct frames for every size, each with its own tube dimensions and carbon layup based on specific performance targets. The goal: to have every one of them perform as well as the benchmark 56cm model and improve handling across the range. Many of the differences lie beneath the surface, but others are more noticeable. On the 2012 Tarmac, the down tubes on the 49cm and 61cm frames measured 66cm wide at the head tube. But on the 2015 model, the proportions change significantly—the down tube on the 49cm model is 49.4mm wide; it swells to 62.8mm on the 61cm bike. The frames also come with size-specific forks—three versions that use different steerer diameters, which D'Aluisio says helps create the appropriate steering responsiveness for each size.http://www.bicycling.com/sites/default/files/fck_content/rear-brake-rotor.jpghttp://www.bicycling.com/sites/default/files/fck_content/bottom-bracket-access.jpgArticle here

Edited by Catatonic_Joe

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