Quote:
Originally Posted by CapriRacer
The growth occurs in every direction, but not evenly. The belt really restricts the growth in the tread
a lot more than where the belt isn't - the sidewalls. If there are cap plies, there's even less growth.
If you bought new tires on Monday and just after mounting set the pressures, 24 hours later (same
time Tuesday), you would need to add air.
If you bought new tires on Monday and drove home, then set the pressures (after the tire cooled from
the drive home), then you would still need more air on Tuesday, but not as much as above.
If you corrected the pressures on Tuesday by Friday, you'd need to add air in both cases, but the
amount would be small - and probably not worth the effort - especially compared to the ambient
temperature effect.
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Wow!
No WONDER so many ordinary folks are driving around on tires underinflated by as much as 5-10psi. “Oh.. I need new tires. I’ll have Town Fair slap some on while I visit Starbucks next door, come pay and pickup my ride, and I’m good for the next 3-6 months yipeeee!”
No, that’s not how this tire thing works. It’s constant maintenance, just like checking the oil, coolant, whatever. Tire growth is not all that different a concept from ‘shoe growth’. A brand new pair of shoes, even properly fitted by a shoe store rep who knows what they’re doing, will ‘break in’ over a period of days or weeks.
Thanks Barry, now I understand yet another, finer point, of tire maintenance.