Thanks! That's what I assumed, but didn't want to put sealant in if I needed to take the tyre back off. So a bit of leakage over a day or so without sealant seems fine?You need to use sealant and once inside, give it a good shake all round to try and coat every bit of surface inside or take it for a good ride straight away. Sealant will seal all the tiny gaps you won’t easily know about
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