Why is my Clik Schrader adapter leaking?

The primary cause of leaks when using the Schrader adapter is the integrity of the threads on the Schrader valve stem itself. There may be small knicks or damage to the threads that are invisible to the naked eye. When that happens, two things can occur:

The adapter hits resistance on the threads before it is fully seated.
This creates a "false tightness," where the adapter feels secure but hasn't compressed the internal gasket enough to create a seal.

Common Symptoms

Audible Hissing: You can hear air escaping immediately after installation.
Slow Leaks: The tire holds air initially but goes soft overnight or over a few days due to a micro-leak at the gasket seal.

Step 1: Verify Tightness

Because thread damage creates friction, you may need to tighten the adapter further than expected to overcome the resistance and engage the seal.

Procedure

Tighten Firmly: Ensure the adapter is screwed down completely. It needs to compress the rubber gasket inside against the rim of the valve stem.
Retest: If you suspect a slow leak, give the adapter another firm turn to push past any thread imperfections.

Step 2: Lubrication (If resistance is high)

If the adapter feels stuck or is difficult to tighten further, the threads likely have invisible damage causing friction. A small amount of lubricant will help the adapter twist past these knicks to fully compress the gasket.

What to use

One small drop of standard bike chain lube or light mineral oil.

How to apply

Place a small drop of lubricant directly onto the threads of the Schrader valve stem.
Thread the adapter onto the stem.
Tighten firmly until the internal gasket is fully compressed.
Wipe away any excess oil.

Updated on 25 Jan 2026

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