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The difference between a 50 and 46 big ring is no more than 1 sprocket on the cassette. The difference between a 36 and 34 is even less.
The new 48/32 from Campy works great with the 11-34 12 speed cassette. The low is the same as an old 28/29 on a triple. The 48/11 provides plenty of top gear. If you don't need the 11-12, don't use them. An old 10 speed 13-29 cassette wouldn't have them.
FWIW, I used a 53/39/28 triple with a 12-25 for 5 years, riding in the Colorado mountains. I finally switched to a compact crank when 11 speed came out.
Last edited by Dave; 08-17-2019 at 04:06 PM.
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