Anyone wondering about wall thickness might compare seat tube ODs which are generally knowable, to the ID as known by the post it fits.
As I said earlier, typical aluminum tubes are thicker walled than their steel counterparts, however the very large diameter or super large box sections may be thinner, or even if thicker, the shape and lower strength make them easier to dent.
As I post so often in various contexts ---- There are no rules, only situations.
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