Posted by SillyOldDuffer on 30/03/2022 09:28:38:
Posted by David Senior on 29/03/2022 22:08:55:
Turn a groove on the section that fits down the tube, and fit an O-ring. Use a fairly chunky O-ring and play with the groove diameter to get a good grip. …
I like this one – easy to make and fit, won't damage the bike, and unlikely to get stuck or corroded in place! I'd worry about finding an O-ring just the right size, but I've no idea what's available.
O-ring sets are cheap, and well worth having if you do this sort of thing.
Or you could glue a custom size one together, as this isn't a critical sealing job