AstroAI Brass Presta Valve Adapter, Convert Presta to Schrader Valve Adaptor for Bikes, Inflate Tire by Standard Pump or Air Compressor (4 Pack)

Very well made and priced nicely.

A simple adapter but the machining quality and finish is excellent.I have tested it using my high precision pressure gauge and consistently I was only loosing 0.1 psi every time it got disconnected from the tire valve. This a little as you can loose from a standard valve connector without using specialized and expensive "zero loss" valve connector.

Nice to have some sturdy adapters since most compressor air hoses want to are oriented toward Shrader valves.

Bought a couple new bikes and upgraded another wheelset. Bought these adapters for those. Works great. Highly recommend.

I have a garden cart that that my Mom bought 40+ yrs ago. When I was clearing out the shed I saw the old cart with its 2 huge bike style wheels of course the tires were flat and wouldn't hold air I figured it would be great to use to haul out the old junk in the shed and across a large yard to my truck. Well got new inner tubes on Amazon they arrived and got them on the rims only to find the valves are the newer tiny type and all the air pumps and compressor I have only fit that old standard valve. Amazon to the rescue again the adaptors came next day 4 in a pack ( so I put taped 1 on all the pumps ) works great super inexpensive and really heavy well made brass fitting.

Good quality construction and material. I like how I can now use my cordless air pump on my street bike.

Bought some of these locally without the rubber gasket by threads and leaky when connect. These solved it by having a positive fit. No more pfffft!

Good quality, perfect fit, inexpensive