Originally Posted by
Campag4life
Graeme,
I will start and say you may not be wrong about this and if you know the relative spring rate difference, I am all ears. Quite sure that Campy would not divulge the relative difference to anybody...including your facility but I could be wrong.
Errr - you are wrong. You have to bear in mind that whilst we are not part of Campagnolo, we have a very close technical relationship with them & are in fact the only non-Campagnolo owned company in the world, apart from ICC in the Benelux, allowed to accredit mechanics to Campagnolo factory standards - so as Campagnolo's main, factory-appointed Service Centre in the UK, we visit the factory 5 or 6 times a year for technical training and discussion. As a result we are privy to any and all relevant technical information, hence, you can be assured that the technical information we give on a forum like this is as accurate and as full as we are permitted to make it.
Originally Posted by
Campag4life
When I hold an Ultrashifter off the bike in my hands with just the bare inner cable installed....I have a new 2014 Chorus shifters in a box just that way as they come from Campagnolo....and I hit the side button with even a fraction of tension on the cable...there is NO cable drag to let out the 2.x mm of cable slack to effect a shift. The detent wheel rotates without any resistance and any resistance in the cable to rotate the Ultrashift mechanism is imperceptible. So the reality doesn't seem to comport with what you write but you have more experience with these parts than anybody.
In that situation you are correct as you are dealing with a brand new lever and no induced cable tension, so no friction or wear-induced factors in any part of the system, cable, cable guide system or lever.
Long-term test data from the factory (Campagnolo simulate tens of thousands of shifts in the test lab, on multiple examples, plus they have many months of field testing on multiple examples) plus our own long-term xperience working with a lot of systems in the fielde, indicates that what I originally wrote is correct, however.