If that's 50/28 and the chainstays are 42cm per Domane 4 geometry chart, the Park tool formula says chain s/b 54 inches editted
https://www.parktool.com/blog/repair-help/chain-length-sizing
@dubtap started
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If that's 50/28 and the chainstays are 42cm per Domane 4 geometry chart, the Park tool formula says chain s/b 54 inches editted
https://www.parktool.com/blog/repair-help/chain-length-sizing