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Posted by @Alban
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
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I want to swap my 1x GRX set up for a 2x one, so I need a derailleur (810 I think), cassette and chainset/BB. I've got a front mech/shifter. I'm wondering about using a mtb double to get some lower gearing than what the GRX offers with 46-30. Something like 26/40 maybe.
I can buy the mech and chainset on merlin new for £125 in total, but thought I'd see if there was a swap or some used parts out there.
Once I've found everything, I will have an 812 derailleur, 11-46 XT cassette (which despite specs I've found to work great), some SRAM 1x cranks and matching BB. Or if you're interested in a swap, even better.