Hi all,

I've been getting a bunch of flats on my commuter bike, and I believe the reason is the rim is drilled for schrader valves, but the tubes I use are all presta valve. I believe the "sharp edge: of the valve hole tends to "cut" into the tube at high pressures around the valve stem.

How do I solve this?

I have a bunch of those little "valve stem nuts" laying around that come with a lot of tubes, that I could apply to the valve stem on the inside of the rim? Would that prevent the rubber from getting "cut" if I put a nut on the bottom of the valve stem BEFORE putting it into the tire? Or would that lead to more problems?

Or should I use something like this: https://www.amazon.com/Wheels-Manufa..._&dpSrc=detail

Or this: https://www.amazon.com/Schrader-Pres..._&dpSrc=detail

Thanks!