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Old 12-29-21, 03:35 PM
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mstateglfr 
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Bikes: '18 class built steel roadbike, '19 Fairlight Secan, '88 Schwinn Premis , Black Mountain Cycles Monstercross V4, '89 Novara Trionfo

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Originally Posted by SoSmellyAir
According to Lennard Zinn (at VeloNews.com), who seems to know what he is talking about, 10 speed crank and chain rings work just fine with an 11 speed cassette and RD.

Technical FAQ: 10- and 11-speed drivetrain component compatibility - VeloNews.com

My 11 speed road bike came with 10/11 speed FSA chain rings, which I replaced with Shimano 105 10 speed chain rings; front shifting improved slightly.
2 weeks ago I zwifted for a total of 4 hours on 11sp shifting with chainrings from the 80s that were also unramped.
Front shifting was fine. Not suggesting it should be done, but it is clearly possible
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