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I just brought a used road bike with 25c tubeless tires and wheels installed. The sealant hasn't been changed/topped up since the start of the year.
Am I good to just add another 30ml of sealant or should I somehow check (with a syringe which I will need to buy) how much is in there already.
I can't hear any sloshing about when I rotate the tyre, so I assume it has all dried out.
Thanks