ExeQianming 4pcs Presta to Schrader Brass Bike Bicycle Valve Adaptor with Seal Ring Adapter Converter and Stainless Steel Inflator Needles

Does the job, seals well due to O ring

If you have presta valves, don't forget to carry one of these. I always attach this converter to the backup inner tube on long rides. If I lost my pump or if it doesn't work for any reason, I can find a petrol station at least, and inflate the tyres. It is always good to have a plan b. Also, it doesn't even weigh

easy to use and do the job, good price 0 complaints

Handy to keep in your wallet, the air compressor at work has an adapter for the shrauder (I can't spell them) valves and I put this on and it worked perfectly on my presta valves!The o ring and come off every now and again but just push it back in and you're good to go

Delivered quickly and said the job well

High quality valves for everyday use or for presta valves tire bikes. Suitable for college students

Fit on well without fouling the open valve and letting out too much air. Airtight, pump clamp grips fine. Excellent value for money.

As above that does what it was designed for.