Originally Posted by
Pop N Wood
This. I have a bag full of these presta nuts designed for schrader holes. I think they come standard issue on Continental tubes.
I have no idea how well they work, I've never tried running presta tubes in a schrader hole.

Yeah, those are the ones. I bought the new Shrader wheelset as backup wheels; older 26” rim brake mtb wheels are hard to find or obscenely expensive. I’ll see how they work, but thankfully I found some reasonably priced NOS rims and will lace them up first.
John