STIFFNESS AND COMFORT - S.E.I. FILM
S.E.I. (Special Elastic Infiltrated) Film, introduced with the development of the first version of the Zero.7 in 2011, is an exclusive viscoelastic material which is placed between the layers of carbon in the frame to improve vibration absorption and shock resistance. Stiffness makes for the efficient use of muscle power, which is why we use ultra-high modulus carbon fiber such as 60TON in the Zero.7. But stiffness doesn’t exactly translate into comfort! S.E.I. Film allows us to preserve the frame’s performance (the speed generated by a certain amount of power) while reducing the effect of vertical stress transmitted by the ground while riding. S.E.I. Film also helps us reduce the frame weight because we can use less lower modulus carbon which would normally be added for elasticity to improve comfort. When compared to a frame made of the same type of c arbon but without S.E.I. Film, Zero.7 has:
- 35% more shock resistance
- 18% lower risk of delamination
- 12% greater capacity to bend without breaking
Additional elements that make the Zero.7 a comfortable bike to ride are the 27.2 mm seatpost diameter and thin seat stays for additional comfort and absorption of vertical stress without wasting the muscle power applied to the pedals.