Presta Valve Core(12 Pack) and 12 Anodized Alloy Presta Valve Caps for Tubeless Road & MTB Bike Works w/Stan's, Vittoria, Continental, Kenda & More. No-Leak Replacement Presta and Schrader Valve Cor

These have worked great for me. I have these clog pretty regularly from tire sealant. These have lasted as long as any others. The metal caps are a nice bonus. I will say as others that the red caps are more of a pink color.

These valve cores work great and they are super easy to install, really like the quality and fit of the anodized valve caps!

I run tubeless on my mountain bikes with valve stems that use removable valve cores, and this 12 pack is perfect for when I do maintenance. However I only gave this 4 stars because the "red" valve caps aren't red, they're more like a pinkish color that doesn't match any red items I have on the bike.

Replacement for my tubeless valves at a great price.

These cores work perfectly in Stan's valve stems in Derby rims with HRII/DHRII tires. Details added to give background of the application here. I actually ordered this for the aluminum caps since my plastic ones are often cracked and am very happy with the caps also. My goal is to help keep dirt out of the valves to reduce migration of grit into the valve core seal.Will buy again.

Replaced two leaky valve cores with these, easy installation, holds air perfectly fine for the past couple months.

I use the valve caps on the MTBs, valve cores are great, had to replace them over time as the o-rings deteriorate or the Stans gum them up and I can't seem to clean 'cleanly'.

These come in clutch if you’ve ever over torqued the brass stopper or bent it.