PRINCIPIA PROPRIETARY ALUMINUM (PPA)
A modern classic. You might call it a classic Principia frame - some would venture it a classic in its own right - the Principia Aluminum frameset. Immaculate welds, virtual works of art, is the first thing the eye catches. Next, maybe the anodised surface, or stunning paint. But the real beauty of a Principia ppa frame is below the surface. The tube inserted welding - TIW, the visco milling process - VM2 & VM3, the carefully selected tubing for each size - D2S and all the small touches that make a difference: carbon friendly seat tube, UPS hanger, the elegant cable routing, the tapered steerer, the triple sealed head set, the elegantly integrated cable glider, the legendary SX geometry. Everything lines up to match the unbelievable Principia ride with unbelievable elegance and sophistication.
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SX GEOMETRY
SX Differential Slope Geometry varies the amount of slope according to frame size. The smaller frames get a more dramatic slope, while the larger frames feature only a moderate slope. In a sense, the work on the SX slope technology began 4 years ago, when Principia introduced the S6 (6 centimeter slope) technology. What we found was that while the S6 slope was perfect for the smaller sizes, it often produced an unaesthetic and structurally unsound seat post length, on the larger frame sizes. The SX technology is a new, in-dividual approach to sloping frame geometries, ensuring a proper fit for all frame sizes.
*Measuring Conventions
Frames with sloping top tubes have top tube lengths that are measured horizontally, from the head tube to an imaginary, extended seat tube. The amount of slope is measured as the vertical deviation from head tube to seat tube. Standover height is measured at top tube midpoint.
| Frame Size |
Seat Tube Length mm (A) |
Top Tube Length mm (B) |
BB Drop mm (C) |
Chain Stay Length mm (D) |
Wheel Base mm (E) |
Head Tube Length mm (F) |
Seat Tube Angle (G) |
Head Tube Angle (H) |
|---|---|---|---|---|---|---|---|---|
| 51(S) | 480 | 530 | 70 | 406 | 970 | 96 | 74,4 ° | 72,5 ° |
| 53(S/M) | 510 | 542 | 70 | 406 | 975 | 113 | 74,0 ° | 73,0 ° |
| 55(M) | 540 | 554 | 70 | 406 | 987 | 133 | 74,0 ° | 73,0 ° |
| 57(M/L) | 565 | 566 | 70 | 406 | 994 | 152 | 73,5 ° | 73,0 ° |
| 59(L) | 590 | 578 | 70 | 406 | 1001 | 170 | 73,5 ° | 73,5 ° |
| 61(L/XL) | 610 | 590 | 69 | 406 | 1008 | 190 | 73,0 ° | 73,5 ° |
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CARBON FRIENDLY SEATPOST
Carbon seat posts are lightweight and strong. Which is good. They are also susceptible to failure if fitted incorrectly. Which is bad. The main problem is with the traditional clamping method, which exerts very concentrated pressure on the sides of the seat post. Principia’s new, patented, carbon friendly seat tube clamps the post gently, spreading pressure over a larger area. Your carbon seat post will be much happier for it.
IT TAKES MORE THAN A FRAMESET TO MAKE A BIKE
Principia makes framesets only, but obviously no Principia frame will ever be used without being built up as a complete bike first. So, to give an impression of what the complete bikes will look like, we have built up some samples for you to enjoy while browsing the Principia frameset range. Please consult your local authorized Principia dealer for more information on a suitable build for you.
KICK THE TIRES
Want to see one in real life? Pull the brakes and kick the tyres a bit? Find an authorised dealer near you.
