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amey
I’ve found the Reserve fillmore valves do not clog up, they have an entirely different design to the standard presta and looks more like a poppet valve. Added bonus is they get rid of the traditional brass valve core (replaced with a bespoke stainless valve) which increases airflow significantly making them easier to mount and add sealant, without having to remove and replace the core.
Been running them for a year on one bike and every time I pump up the tyres it just works, no blockages and never had to unclog them. I have since the run them on two other bikes same result. Super happy with these.