Let all the air out of your tyre. Does the rim sit on the ground?
No, but only the thinnest part of the tyre stops it, and not by much. Any rolling off centre and it would
Perhaps. The more-round tyre shape from wider rim should deform less but if it's really under inflated I suppose it's possible.
@joeae started
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Let all the air out of your tyre. Does the rim sit on the ground?