Swap - rear mech di2 rd-r8170 12 speed (mine) for rd-r8070 (yours) - because I'm a wally and bought the wrong one brand new

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Grifffff

Might have a new 8070 in my box. If I do I’ll be up for selling. No need in swap.
Will. Check tomorrow.

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andyfallsoff in reply to @Grifffff

Hi - any chance you were able to check?

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