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The sealant will slowly evaporate even if you don't have a puncture as no tyre is totally impermeable to air. If you end up with a solid tyre before wearing out the tyre then you really need to ride the bike more. No point having a tubeless setup in wall art.
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If you have a bike on 'the bench' for a considerable amount of time, just top up before you next ride it. You don't have go round dutifully topping them all up on a schedule.
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Or do you just keep topping up till you have a solid tyre?
The internal volume of a 700×25C tyre is about one litre. The dry residue of sealant is about a tenth of the initial volume. Topping up quarterly is about a tenth of a litre per year. The Fermi approximation of the time to fill a tyre with solid sealant residue is therefore 100 years.
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Brommers
Howard
gbj_tester
@sohi
I got a new bike a while ago with tubeless tyres already installed and now I am reading that
you should top up the sealant every 3 month. Is that only the case when you had punctures and
some of it escaped? Or do you just keep topping up till you have a solid tyre?