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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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Traditional frame design uses tubing with identical diameters and wall thicknesses for all frame sizes. Either this makes the smaller frame sizes too heavy or the larger frame sizes insufficiently strong and stiff. Principia’s DESIGN 2 SIZE technology optimizes the tubing specifications for the individual frame sizes ensuring optimum riding characteristics for riders of all sizes.
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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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