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The latest generation of Principia’s trademark elliptical bottom bracket and head tube design. The increased diameter of the idsection of the tubes adds rigidity and strength without increasing weight. The ELLIPSE PROJECT gives you more efficient power transfer and more control when it counts.
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Carbon seat posts are generally light and strong but can be fragile when fitted incorrectly. The pressure that the seat post is subjected to when tightening the seat clamp can be critical and even structurally fatal. Principia’s unique CARBON FRIENDLY SEAT TUBE gently distributes the pressure load over a larger area of the seat post. This clever design feature is safer for both you and your seat post.
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Principia’s SX GEOMETRY adapts the slope of the top tube to the individual frame sizes adding more slope to the smaller frame sizes and less slope to the larger frame sizes. This means that tall riders do not have to use long seat posts that are structurally weak and unaesthetical.
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Imagine a replaceable rear derailleur hanger that allows you to shift gears with the precision and reliability of a fixed non-replaceable rear derailleur hanger. The INTEGRATED SHIFTING PRECISION derailleur hanger is a unique Principia feature which combines the precision and rigidity of a fixed derailleur mount dropout with replaceability. INTEGRATED SHIFTING PRECISION is featured on all Principia models.
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