Aluminium Hydroformed Cyclosport. We've brought the care and attention to detail we learned designing our road bikes to our collection of superb cyclosport models. We designed the geometry to achieve a fine balance of pleasure and precision. The Tenor, Triton and Sebelius have all new 6061 series aluminium frames and hyrdoformed tubes dynamically sized to provide strength and flexibility where needed. Longer chain stays help absorb road shock and the tapered 1 1/2 to 1 1/8" head tube combines precision steering and front-end rigidity. The circular and oval tube shapes give you the comfort and rigidity of top performance bikes.