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Specialized Tarmac SL8 Pro Ultegra Di2 2026 review: Frame
The SL8 Pro frame utilizes FACT 10r carbon, a layup slightly less extreme than the 12r version found on the S-Works, but capable of offering excellent torsional rigidity. The geometry remains a cornerstone of the sector: available sizes are designed to cover a wide range of heights without forcing excessive compromises in biomechanical positioning. Important technical note: the frame is designed exclusively for electronic groupsets, confirming the direction taken by the high-end market.