Muc Off 1051 Black Tubeless Presta Valves, 44mm - Premium No Leak Bicycle Valves with Integrated Valve Core Removal Tool

great fit

Pretty cool

I love Muc-Off! However, this set came with a faulty valve core. After numerous attempts to seat my tire ( I wasted two Co2 cartridges, 3 ounces of sealant ) I realized the valve core was not allowing the air to enter the tire! Put in an old valve core and the tire pressured right up! This turned out to be a costly replacement for me.

The valve core is garbage. you cant inflate the tire cause the core doesnt allow air to pass through. Replaced core with old core and it works just fine.

I usually use 45mm stems for my wheels but needed 10mm more with these stems. This seems to be because that lock ring is thicker than the standard ring. I ended up needing the 60mm stems. The product seems pretty good and am only rating it a 4 because its about twice as expensive as it needs to be.

I tried fitting up my 27.5 MTB wheels using Stand tape and valves since theyre kinda the OG of the tubeless market. I could not get the stupid things to seal at all! Either tire just leaked and leaked from the valve stem - I went through 2 packs and not a single one would seal even with sealant! It would seal after a bit, but the second I touched it to even just check my air pressure, it sprung a leak again. I was just about ready to just give up on tubeless, but I figured what the heck, Ill try stripping the wheel down and rebuilding it with Muc Off rim tape and seals and OH MY HECKING GOODNESS!!!! The rim tape was much better than stans as well, but these valves are head and shoulders above the Stans valves! How these are better than Stans: - With these valves, you get all aluminum construction including a color matching cap as well as a back plate of aluminum that goes behind the inner seal. This allows the clamping force of the nut to simply squish on the seal rather than trying to pull the valve out of the seal (glaring at you Stans). - Another things these have is 3 different seal shapes that you can chose from to match your specific rim shape (Stans only has a small round seal thats not interchangeable or replaceable). I went with the rectangle(ish) one for my MTB rim. - These valves also have a small O-ring that goes in between the nut and the rim, which provides yet another sealing surface. Stans did not have this and this is where I would ALWAYS get leaks with Stans. I mounted both of my tires up (front and rear) with Muc Off rim tape and these valves and tried to inflate them. On my front, I didnt even need my air bomb to seat the tire! I needed it on the rear (or probably could have gotten it with another layer of rim tape, but whatever - no biggie). To my surprise, once seated, BOTH wheels hold air for several minutes with no significant drop in tire pressure even without sealant! Obviously, there are some little pinholes in there that will be sealed up properly once I put in my sealant, but the Stans setup was a fight just to inflate enough to set the bead! Needless to say, Stans is junk in my experience/opinion and I will be sticking with Muc Off from now on!

Looks great. Works great.

These valves are more expensive than others but versatile. The optional attachments for various interior wheel shapes helps ensure you avoid air leaks.

Very high quality aluminum valve, nice to have a couple options for the inner rim seals, and a handy core remover built into the dust cap. Used these for my 1st tubeless setup on a road bike, and the seals here worked perfectly, got a nice blast of air into the tire with the core removed, just went very smooth, and they look great too!

I have had no issues or of these valve stems. Converted to tubeless with no issues or leaks of any kind around the stem or seal.