I am going on cycling tour on the Himalayas through Tibet, Bhutan, India, Nepal and Pakistan on my Araya FED touring bike. Now I am thinking in changing my gear, crank which is SR-SUNTOUR XCT 48-38-28T×170mm w/Guard and my Cassette is SHIMANO CS-HG31-8 11-30T 8 speed, to very low gearing 10 speed. Would Changing to Shimano XT M782 3x10 setup (22.32.40) with an 11.36 cassette, help overcoming for many hours everyday for 3-4 month cycling the Himalayas? I think I have to change derailleurs, chains and more.
Pleas I need some advise from mountain climber cyclists ( I come from very flat country,Denmark) , what groupset would give me the best range and lowest gears for climbing? Thanks beforehand.