Originally Posted by
robow
Not really, Mavic 719 rims for example are drilled large enough to accept a schrader valve but come with a plastic insert that can be added/removed at will making the rims acceptable for a Presta valve as well.
I did not realize that, which goes to show how observant I am since I have that rim. The OP will likely have a choice as well as I think the Alex Adventure rims that come on the disc Trucker are drilled for Schrader. So presumably there an adapter.
For what it's worth, while I prefer Presta, I have never felt the need to change my rims from how they came. Rims drilled for Presta valves get Presta, and rims drilled for Schrader valves get Schrader. Carry a spare and it won't matter. There's also a Presta to Schrader adapter you can put on your valve stem if you want to pump up your tire from a gas station air compressor. I have one on my tire at all times, but I also keep a Presta pump handy, so the adapter has never been necessary.