Tubeless valve test - Stan's Exo Core: High airflow thanks to external core!?!
Stefan Frey
· 20.03.2026
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With the Clik Valve System, Schwalbe has developed a completely new type of valve that
Universal compatibility thanks to conversion kits
Schwalbe offers conversion kits for various valve types. For Sclaverand, Dunlop or tubeless valves, only the valve insert needs to be replaced. An adapter is available for car valves, which can be screwed on. This can be removed again if necessary so that petrol station pumps can still be used.
Schwalbe Clik Valve Tubeless Valves - Info
- Price: from 23,90 Euro
- Weight: 12,74 gram
- Valve length61 millimetres
- Available lengths: 40 / 60 / 80 millimetres
- Valve head: Schwalbe Clik Valve
- Outlet openings / insert-compatible: 3 / yes
- Special features: Innovative valve head with click system, requires special pump head, 4 mm hexagon socket
Rating & Conclusion - Schwalbe Clik Valve Tubeless Valves
| Category | Grade |
| Weight (20%) | 0,5 |
| Handling (20%) | 3,1 |
| Airflow (30%) | 3,4 |
| Protection against clogging (30%) | 3,0 |
| BIKE NOTE | 2,6 |
Conclusion: Schwalbe Clik Valve
The new Clik Valve from Schwalbe is easy to fit thanks to its hexagon socket insert. In conjunction with the special pump head, it facilitates handling when inflating - it can be fitted and removed without the need for a clamping lever. However, adjusting the air pressure is fiddly because the valve pin sits deep in the core. The modified design hardly improves the air flow, the valve offers no advantages for tubeless setups and only provides limited protection against clogging.
This is how we measured the air flow
To find out which valve offers the best airflow, we carried out extensive series of measurements. However, the effect can be most clearly demonstrated directly on the wheel. The basis is a 29 x 2.4 inch wide MTB tyre, which is inflated to 2.0 bar using a digital pressure gauge. In several runs, we measured how much air escapes in five seconds when each valve is fully open.
While all Presta valves - with deviations of +/- 2 per cent - are in the range of 34.1 per cent, twice the amount of air flows through the Topeak valve in the same time. At Stan's we measured an air loss of 78 per cent, at Reserve 87.4 per cent. The coreless Muc-Off achieves 100 percent air flow, which means that after five seconds there was no measurable pressure left in the tyre. This makes it by far the best tyre in this comparison.
Stefan Frey
Editor
