If rigids were as good as tubes, why would they have invented those then?
See
John Boyd Dunlop - Wikipedia, the free encyclopedia for an answer.
In a race tubes beat rigids hands down.
When a tire meets a little bump, just a tiny part of the thread will flex in while the rest of the tire, the rim and suspension hardly move. With rigids the tire, rim and suspension all will have to cope with the bump, moving 100 times as much mass.
If the suspension system does not return at least 99% of the energy the wheel puts in, the rigid will not have a chance.
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2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
lifetime FE over 0.2 Gmeter or 0.13 Mmile.
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