The heavy thorn-resistant tube I pulled out of the 23mm front tire on a bike I had recently acquired weighed more than the regular tube AND the 28mm 150tpi Vittoria Rubino Pro Tech III belted tire that replaced it - COMBINED! Said previous 23mm tire/tube rode terrible - like I was riding a solid tire. The ride quality after switching was light night and day!
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'75 Fuji S-10S bought new, 52k+ miles and still going!
'84 Univega Gran Tourismo
'84 Univega Viva Sport
'86 Miyata 710
'90 Schwinn Woodlands
Unknown brand MTB of questionable lineage aka 'Mutt Trail Bike'
Plus or minus a few others from time-to-time