I have a road bike here with 622-16 wheels and Schrader valves. As I needed to replace a tube, I found that most options in the 622-23 size use Presta valves. I read around a bit and found people suggesting rim hole reducers as in Can I use a Presta tube in a Schrader rim? among other places.
This didn't sound too hard, so I went ahead and ordered Presta tubes along with these Mavic reducers.
Now that I have all parts in front of me, things are not as foolproof as I thought they would be. For one, the reducers are not symmetrical and can be inserted into the rim from either side. However, neither side feels like the clear choice. Rather, relying on the fixing nut of the valve alone seems not to be bad. Let me illustrate.
From the outside the reducer fits snugly, but on the inside it creates a bulge that the tube needs to wrap around.
Finally, I could just forgo the hole reducer. The valve comes with a nut that fits the drilled hole snugly. Is this sufficient to prevent the tube hernia mentioned in Can I use a Presta tube in a Schrader rim? ?
What's my best option here? Do I have to get another set of grommets or should I just stick to Schrader valves in this rim even though the choices are few?