I don't have experience with eTap yet, but after reading through this thread and the linked thread, I really do find it hard to believe that SRAM knowingly accepts this as part of their design. Crap happens, be it a broken chain or, far more common, simply a dropped chain (SRAM better than anyone should know that). That is a very reasonable and foreseeable scenario that I think a manufacturer could easily be held accountable for in the event something really bad happened as a result of the spokes getting torn out resulting in a horrendous crash. Part of any good system design is trying to foresee the scenarios that might happen and ensuring there's a failsafe in place in case it does. Of course, it's impossible to account for every scenario that might occur, but a chain drop....??? Would it do that on most wheels or do they at least give some warning or caveat saying "may not be compatible with certain wheels so check this first blah blah"? This one is curious to me but thanks for the heads up. I'll be sure to watch for it when the time comes.
Ironically: eTap, with SRAM Casette and Zipp NSW...all the newest equipment of the same company.
I love the way it shifts and the wheels, but as you said a chain drop can always happen.
I wrote them, and the official answer was if the chain snaps broken spokes will be the last of my issues...
Seriously, they actually said that? Well, with them being a US Company, and knowing a little bit about how product liability cases are handled here... good luck to them when they find themselves in court due to someone ending up brain dead after crashing because of it. So, yes, it may be the "least" of your issues (I'm assuming they said "least" and not "last" in their response but doesn't matter either way at that point).... but it could be a VERY big issue for SRAM if and when something like that happens. If McDonalads can be held liable for making their coffee too hot, then SRAM doesn't stand a chance on this one.
Can't post a print screen with the phone but here is the answer, apparently the damage can be far worst
than a couple of shredded spokes
There is no way to have the derailleur adjusted in this manner, as the chain is designed to tension the cage away from the spokes in this high position. We understand that you are trying to eliminate a possible scenario to protect your wheel in case of chain breakage- however, it should be understood that if a chain breaks, the derailleur tension into your spokes in high position is not likely the most serious of issues to consider. When a chain breaks, it's likely that it will not simply fall gracefully away... the primary way a chain breaks is by force in a jam. It is more likely that the high tension of pedal forcing a chain during binding will most probably jam the chain into your derailleur, spinning it up and around your seat stay (if not first breaking the derailleur hangar) and/or or the slack in the chain will get caught wrapped around the cassette, possibly damaging spokes or interior of dropout depending on how the chain becomes wrapped.
Note that these scenarios are both catastrophic, are likely due to extreme mal-adjustment, and are extremely rare. Be sure to never force pedal through any chain jam, on any drivetrain system.
Service and Technical Documents:http://www.sram.com/service
Learn more about The Power of Bicycles: http://www.worldbicyclerelief.org