Velotubes Presta Valve Core - 10 Pack

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 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.

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

They work they way they should. No complaints but no compliments either. Good to have a few spares on you

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.

Got these for my tubeless set up

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.

Used one to fix a slow leak i couldn't isolate in a tubeless tire (with plenty of Stans). Had changed tires already and didn't fix it so i thought i would try the valve core. Fixed it. They also appear to be very solidly made, good value.