Art, I agree the chainstay could be shortened. However, when it gets TOO short, shifting issues arise, especially those noisy cross-overs becoming worse as the chainstays get shorter. On the other hand, some of the chainring differences may be possible without rubbing interference. I know I can't run a 54X39 with about a 40cm chainstay without some rub, but a 54X42 is fine...only thing is, on some hills, I'd sure rather have my 39. Shorter chainstays may stiffen the rear end, but, that may impair ride quality to some degree, and it would affect handling.
So far, we've talked about the issues regarding shorter chainstays as: providing sufficient room to fit the wheel, weight distribution/handling, ride quality/stiffness, and chainline/shifting characteristics. Are there other aspects of chainstay length we're forgetting?
Quid quid latine dictum sit altum videtur
(That which is said in Latin sounds profound)
So far, we've talked about the issues regarding shorter chainstays as: providing sufficient room to fit the wheel, weight distribution/handling, ride quality/stiffness, and chainline/shifting characteristics. Are there other aspects of chainstay length we're forgetting?
Quid quid latine dictum sit altum videtur
(That which is said in Latin sounds profound)