Velotubes Presta Valve Core - 10 Pack

I was told by a bike mechanic to replace the valve cores anytime I add sealant to my mountain bike. I didn't take that advice at first and then my valve cores would get gummed up and bent and leak air when I unscrewed them to add air or get sticky and stuck so I couldn't add air. I just replaced one with this product and I easily added air to my tire and went for a ride the next day. Everything seems to be good. No issues. Now I plan to keep these on hand at all times and replace them more frequently instead of waste time with bent or sticky ones. I also always plan to keep one in my pack when I go for rides.

Perfect fit and quality of this valve is what I’d expect an artist using a high end cnc machine would create! Super easy to install and BAM, back up and riding again after a random valve failure I had just riding around my yard testing my compression on my suspension.I have 2 of these in my small saddle bag incase myself or someone else needs ones. Great price for the pack! Again the fit and finish is second to none. I could look at these all day as they’re so perfect.

Works like they should, good open airflow, no leak closed.

My tubeless tires stems get clogged. These were perfect for changing out

I had a leaving tube it was leaking at the steam. I didn't realize you could change the valve steams on a presta valve but it worked like a charm and stopped the leak. Cheap fix

I had an innertube that was only about two or three years old with a faulty Presta valve core.I put an extremely small amount of silicone on the valve and it really didn’t help.So I tried these new Presta valve cores and it was an absolute night and day difference in quality.It doesn’t leak it opens up easily when pumping air and seals properly.So far I would 100% recommend these.

It works.

After reading many review I have bought the Presta Valve core and it was great experience to see the precisely done Valve core. The tread is smooth and the dimensions are correct, no burrs. As a forment quality control engineer I was satisfied.