Originally Posted by
xroadcharlie
Swapping out the 50/34 chainring to a 46/30 would reduce your climbing effort by about 12% and allow you to climb at about 7 kph at a reasonable 60 rpm. I would not pedal over 50 kph, Just coast.
This might require that the OP buy a subcompact crankset. Not super cheap, but it would be effective (assuming you take the above advice and just coast down fast descents).
You could
probably throw on an 11-34 cassette without any other changes, but it would be a tiny difference.