Originally Posted by spartacus
Is there any merit in jacking the trailer up over winter so there's no pressure on the tyres? The boat is in a garage - so not in the elements. Heard or read somewhere you can get flat-spots on the tyres if it's left standing. I probably won't be venturing out again until next March/April.
All car manufacturers use transit pressures of 50/60 psi when vehicles are to be left standing a while or will be in transit a while on a ship, for instance. By 'a while', I mean greater than one month.
My work-based experience is that tyres, once flat spotted, never
recover, and the warranty stats can be littered with claims if the transit pressures aren't set and then checked and maintained through the storage and/or transit process. It's not so much about the rubber taking a set - although this does happen temporarily - it's more about the tyre steel reinforcements taking a set.
Pump then up to 60psi and check monthly. Attach a tie-on label to the wheel or trailer hitch to remind you to lower them to the correct running pressure before you next go out