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It was
26,39,53
11 13 15 17 20 23 26 30 34
and i changed it to
12 13 15 17 20 23 26 30 34
with a loose 12t cog
i want to buy another 2 cassettes and join them to make
13 14 15 17 20 23 26 30 34
or
13 14 15 18 21 24 28 32 36
53x13 is basically 46x11
and 26x34 is basically 30x42
so 9 speed 53/39/26 & 13-36 is like 11 speed 46/30 & 11-42, except you get 3 straight gears at the top end, 13-14-15 instead of 11-13-15
I have ridden this bike up the steepest street in the world (34.8%)