Originally Posted by
Atlas Shrugged
Shifting through the down tube may sound simple, but one can't help but imagine contorted hand gymnastics reminiscent of a bicycle-based Rubik's Cube. The elegance of simplicity might be debatable in this case.
It is actually quite easy to do double shifts with down tube shifters.
I simply keep my dominant (left) hand on the handlebar and configure my hand through the top tube to touch each lever appropriately then move the fingers accordingly. Really, it's not a big deal. The front is essentially binary for all it matters in this context and the rear only needs to move 2-3 cogs in the opposite direction. If you have ever rode your bike one handed, you can do it. It's not quite as easy as eating gummy-bears from a top tube gastank bag but is easier than reaching for a water bottle
I use the Ene Ciclo 2x11 and TRP Hy/RD hydraulic disc, fwiw.