Jugi wrote: ↑
Mon Jun 17, 2019 9:01 am
At this time the Tarmac SL6 has arguably one of the best compromises between weight and aero, and if Cannondale can push the envelope higher, I'm all for it. You're referring to the bottom bracket shell being metal? Isn't that the same as on the SuperSix Evo, Izalco Max?
It will be very interesting to see the first in-depth ride reviews, and even more so if they include technical details. In my opinion two things separate the current crop of road bikes - brand popularity/awareness and these technical details. If the Tarmac SL6 is being used as a benchmark, most likely there are multiple things which can be enhanced in terms of aerodynamics and weight. On the flip side, for example cable and hose integration into the head tube means considerably harder installation and maintenance.
I hope Cannondale has done the integration in a user-friendly way. Considering how typical creaking bottom brackets have been on some C'dales, in my opinion they should produce a technically well put together bike. Even if that means making compromises on aero drag and weight. I wouldn't like to spend a considerable amount of time building a bike, only to discover it develops a creak or some other issue requiring regular maintenance or tweaking.
Geometry and ride feel should be spot on. I have always steered clear of the previous SuperSix because I didn't like the looks. The new model is definetly a step towards a better, contemporary design. Hopefully the paint jobs are up to date as well.
hopefully, Cannondale does/did an apple to apple comparison between the supersix and the tarmac. Their own testing shows that the systemsix had a CdA of approximately 0.063 at low and zero degree yaw angles and reducing down to a minimum CdA of approximately 0.055 at ten degrees yaw. The image on the previous page shows that the supersix is approximately 0.075 CdA at zero yaw and increases out to about 0.078 at ten degrees yaw.
when cannondale did their systemsix test, the venge vias they used was running 26mm turbo cottons vs the 23mm rubino pros on the systemsix. That alone immediately skews the results - especially since cannondale claim there is virtually no difference between a GP4000 23mm and 25mm mounted on their knot64 wheels.
If the tarmac they used in the results on the previous page was round bars, 26mm turbo cotton, rim brakes - chances are that a tarmac might be more aero than the supersix if aero road bars, conti tires and discs are added (specialized claim that the tarmac SL6 is slightly more aero for the disc version than rim brakes in their wintunnel test).
either way, a quick calc appears to show that, from cannondale's tests, the systemsix is about 15 watts faster than the new supersix. Tour mag's test only put an allez sprint with zipp 404's at 16 watts slower than the systemsix?