Originally Posted by
wgscott
I have a 46/30T White Industries crank with my Shimano (Di2) derailleur, and an 11-36T cassette on one of my wheel-sets. Shimano's derailleurs can handle this. My limited experiences with SRAM leads me to suggest avoiding it. They introduced the 1X because they never quite got the front derailleur thing right.
Get Shimano Di2 Ultegra. You won't regret it.
My 46/30 Sugino crank with SRAM Rival 22 and 11-36 cassette works without a hitch. Following the setup instructions for the yaw FD is critical as it is slightly different from what you may be used to doing with other derailleurs.
With the White crank, you might try 26/42 rings and experiment with cassettes to see what your RD will manage. 11-42 would be close to what you wanted on the low end, but even if you had to go with 11-40 or 11-36 you would be in better shape than with the 1x setups suggested.