That should be plenty of gears for almost any climb in North America. I have a 11-34-tooth climbing cassette on my bike right now for the Mount Washington climb in New Hampshire - but that is 7.6 miles averaging 12 percent with grades that kick up as high as 22 percent. If you are looking at sustained grades of 6 or 8 percent, you should be very comfortable with a 34:32 low end option.
1 Like