Would anyone have a pair of cheap non-boost 27.5″ Mavic Crossmax/Deemax type wheels they would be willing to part with. Even better if you were prepared to swap them for my 29″ non-boost Mavic Crossmax SLRs. 

They are for my Frankenbike gravel rig so don’t need to be perfect

Let me know what you have in the first instance and we can take it from there.

Other brands of 27.5″ wheels may be of interest but need to have old school 9mm QR centers, disc mount and HD driver.