Gravel Frame / Chainline Question (DUB Wide?)

I’m trying to use spares in my parts drawer to build up a winter/rainy-day/spare/loaner gravel frame. I’m looking at the BXT gravel frame (are links allowed? If so – [https://www.ebay.com/itm/225402442592?hash=item347b085360:g:p7EAAOSwMOFj4LOJ](https://www.ebay.com/itm/225402442592?hash=item347b085360:g:p7EAAOSwMOFj4LOJ)), but having a hard time figuring out if my parts will fit it. Specifically, my crank sets are SRAM DUB Wide Rival 1 cranks. SRAM says these are meant for frames requiring a 55mm chainline (vs 52mm standard), but I don’t know what spec to look at to figure out if it will work? I reached out to BXT and they said they don’t know, which was a bit concerning (and on that note, also wondering if there’s another frame I should be looking at for this instead, at roughly the same price point – I already have a nice gravel bike, this is for taking out in the winter on yucky salty roads, or loaning to friends, and so on, don’t want to spend a fortune on it).

If it will work, or if the chainline doesn’t really matter or isn’t actually a frame variable, I’m also wondering what BB would work. Frame lists BSA 68, and from what I understand DUB vs DUB wide doesn’t necessarily need a different bottom bracket, just spacers? So would this SRAM BSA 68 DUB Wide BB work? https://planetcyclery.com/sram-dub-wide-english-bottom-bracket-english-bsa-68mm-road-black

Or does that require a different frame? Would the non-Wide version of that same BB be more appropriate for the BXT frame, just using spacers for the appropriate width?

The rest of the drivetrain parts, if it matters, are long cage SRAM Rival 1 rear derailleur, and a couple different 11sp cassettes (11-42, 11-46).

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Any experience here with the BXT? Good enough or stay away?

Thanks!

by darthalal