Blovess Yueton 10pcs Copper Presta to Schrader Converter Car Valve Adapter Bicycle Bike Tube Pump Air Compressor Tools

These worked perfectly. Unscrew the Presta top, put this product on, fill the tire to desired amount with Shrader tire inflater. Then you can remove them without leaking air, or just leave them on. This product saved me lots of time fiddling with the Presta connection and my small little emergency bike pump.I was skeptical after reading reviews for similar products and seeing reports of those products leaking or being too deep so that it was difficult to depress the valve core. No such problems here. Simple, simple, simple and a good product. I'm not sure what I'll do with the rest of the converters, since you really only need one, but I'll toss a couple in the adventure bag and the rest in my tire valve drawer...

Great product for the money. Worked perfectly. Just remember to unscrew the Presta valve before screwing it on. I did not leave it on the valve since I just need to use it intermittently with the electric compressor. Minor problem was only 9 were in the pack which had been cut with a razor. This could easily have happened in opening the original box. But I only needed one, so I am still up 8 from what I need.

ok

On one of my tires, it's a real crap-shoot whether or not my thumb-lever compression Shrader pump attachment will push in deep enough to open the Presta valve. So I take this adapter off and twiddle the lockdown nut on the Presta and try it again and maybe it works. Is it possible that this adapter might be a millimeter or two too TALL or something?

It's great to have a couple extra valve adapters, so this was a good deal. I put a couple in each car, a couple in my seat bag, and a couple in the garage. Now I don't have to go hunting for an adapter every time I need to fill the tires. They screw on easy and seal just fine. They work as well as any other adapter I've used.

BIG PROBLEM W THESE.... based on the previous positive reviews i have to guess that they are now making them slightly smaller to save $$. They are not large enough to accommodate the top of the presta vale seem (the locking ‘knob’). Assuming that they were ok I forced me over the presta valve - it was tight enough that it pulled the stem of the presta vale out with it when i removed it again. SCKS big time... cost me an $8 the pls 20 minutes to change the tube out.

Did not function for the designed function. It allowed air to enter the tube of my road bike, but it did not allow for a reading of the current tire pressure. I just had to guess.

These work well as adapters for presta valve tires to a Schrader pump. Just remember to loosen the nut on the presta valve before you use it. I do not know if it is absolutely necessary to re-tighten the presta valve if you are going to leave the adapter in place on the tire. I would definitely use a valve cap if you are going to leave it on the tire.