Designed specifically for professional athletes and for all those riders who are looking for maximum performance, the SL7 is the spearhead of the Carrera podium: weight of the small size is 960 g. and 97N / mm stiffness in the “free frame” lab test!続きを読む »
Designed specifically for professional athletes and for all those riders who are looking for maximum performance, the SL7 is the spearhead of the Carrera podium: weight of the small size is 960 g. and 97N / mm stiffness in the “free frame” lab test!
As universally recognized among the cyclists, lightness and stiffness are frame features that get in their own ways and the only way to keep them together is the correct choice of materials and the geometry of the tubing. For materials, the choice of the carbon fibers is very wide and sometimes confusing.
However, because of stiffness, strength and workability requirements, we had to narrow this down so our engineers selected the carbon fiber T800 and M46J from Toray Industries inc. But working on materials is not enough. In order to get the maximum mechanical performance from the carbon fibers, the moulding process manufacturing must be highly efficient. The carbon layers should be oriented in the right directions and be compacted to form a solid structure without porosity and heterogeneity. To accomplish this task, the use of EPS technology (Expandable Polystyrene Shell) allows the fibers to maintain the perfect orientation when the resin dries and the carbon weft gets solid thanks to temperature and pressure.
The tangible result is a better internal finish of the frame but above all a better quality of the composite material part. As for the geometry, the special rounded shape of the tubes and the cross-sections with a ratio between the two orthogonal dimensions close to “1”, allows to obtain a high moment of inertia which, in combination with composite materials, amplify the stiffness of the tubes and so consequently the stiffness of the entire frame structure. A further contribution to enhance the performance is given by the junctions which is where the tubes exchange the mech stress among themselves.
Let’s talk about the junction between the seat stay and the top tube. The particular “flattened and enlarged” shape of the horizontal tube is a good structural continuity between seat stays and top tube, giving the frame a high torsional stiffness and a high reactivity during the impulse phase. The bottom bracket area is another important example: asymmetric chain stay because of the housing of the crank.
Thanks to FEM (Finite Element Method), it was possible to optimize this area. In addition to purely mechanical aspects of the SL7, there are other considerable technical features, such as cables guide plate which allows the integration of the shifting cables, and the ICRS for the compatibility of electronic as well as mechanical groups. Moreover, tapered head tube (1-1/8" and 1-1/4"), Ø31,6 seatpost, BB Ø41x86,5 Press fit and compatibility for 25mm tires complete the picture and give SL7 the most advanced standard equipment.
Frame: T-800HM-HS 60T Shm XN60 Special Nano UD
Fork: Ff43 Carbon 60hm 60hm 1-1/8" - 1.4"
Assembly system: Monocoque Advanced process Vabm
Integrated headset system: 1-1/8" - 1.4"
Bottom Bracket: Press Fit 86x41
Rear dropouts carbon integrated chainstay
Frame weight: 960g (size S), fork weight: 370g
Comes with a frame, fork, headset and seatpost
For electronic shifting systems and for traditional mechanical shifting systems