Originally Posted by
avhed
Availability
That's not a problem of triplet wheels specifically, lots of things are harder to come by these days.
P.S. Especially in the world of rim-brake 650B, rims have come and gone out of production before you know it, so I learned to buy spares long before I need them. It's also good to be flexible on the make/model if you can match the ERD to something else.