700/38 vs 700/23 tyres on a "comfort" hybrid commuter bike.
"John Henderson" wrote in message
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Theo Bekkers wrote:
We've had this discussion before and there's no argument that the
rolling resistance of a wide tire and a narrow tire are the same when
both are at the same pressure. However, the narrow tire will
invariably have a higher recommended tire pressure, so when a wide and
a narrow tire are inflated to their recommended pressures, the narrow
tire will have a smaller contact patch and a lower rolling resistance.
The argument that a wide and a narrow tire have the same rolling
resistance is therefore spurious.
It's by no means certain that:
1) a narrower tyre will invariably have a higher recommended
maximum pressure, or
2) a narrower tyre will be inflated to a higher pressure.
The argument in favour of wider tyres stands on its merits.
John
You could try 700-18 tyres and a 13 mm rim width, inflated to 160 psi of
Helium.
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