Originally Posted by
shipwreck
I guess I read it as he just does not have any tubes in presta. It's definitely possible to drill and the rims are not to skinny, but still might be better to just get some tubes when shopping for cables and such.
Don't use a drill to widen presta holes for schrader. Buy one of these:
https://www.amazon.com/General-Tools...eywords=reamer
They're at your local hardware store for a few bucks. You'll have much more control and get a cleaner hole. Follow up with some 800 grit sandpaper rolled into a little tube and polish the inside of the hole.
That said, I'm a fan of presta valves and if the wheels are already set up with presta, why switch?