Originally Posted by
rm -rf
The 13-28 is 13-15-17-19-21-24-28
The 11-28 is 11-13-15-18-21-24-28, so it has bigger jumps in the middle to add the extra 11 cog.
I'd much rather have the closer gears in the 14 mph to 22 mph range on the 50 chainring, instead of the faster top end of the 50-11.
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I have a Campagnolo 13-29 10 speed cassette for hills. On downhills, I'll effectively spin out at about 32-33 mph on the 50-13, instead of reaching 34-36 mph on a 50-12. I don't miss the 50-12.
My 34-29 is great on steeper hills. I can even sit down on 8% grades, at a slow speed, and use fairly light pedal pressure, no mashing needed.
You and I think alike. 50/13 on a road bike is the same (104") as 48/12 on a mountain bike, and that is tall enough for me. The nice thing about the 13-28 (or my mountain bike's 12-28 8-speed, which is the same thing with a 12 added to the top end) is that an 8-tooth drop in front gives one a great 1.5-step "Alpine" gearing pattern. Being old school from the days of 2x5 geartrains, I do not mind needing a double shift to make a fine-grained change in gear ratio.
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069