Originally Posted by
Milton Keynes
So what I did was screw one of the flat Presta nuts all the way down on the stem before inserting it through the hole, then another one on the outside like normal. Is there any issue in doing this, if even temporarily? I think this is a better solution than not putting anything on the inside part of the stem. I run 90 PSI in my tires so I would be afraid the stems would blow out if I didn't have anything holding them back.
No issues. They were actually designed with the collar for just this purpose, and you actually only need one on the outside of the rim. As mentioned above you can order Schrader hole adapters for cheap if you like that solution better. I like the rubber ones better as they offer a little more protection against cutting the base of the valve stem.