[python] Re: Tire for Breakfast?
- From: Olaf Johansson <noll@xxxxxxxxx>
- To: python@xxxxxxxxxxxxx
- Date: Thu, 28 Apr 2011 10:06:12 +0200
28 apr 2011 kl. 00.15 skrev George Durbridge:
> There is another factor, which may not apply to you. On some of our
> roads, which are fairly rough, particularly the unsealed ones, we get
> lower rolling resistance by lowering tyre pressure. At the lower
> pressure the tyre deforms around a pebble, which takes less work than
> lifting the bike over it. This has been checked by roll-down tests on a
> hill with a roughly-sealed road: Marathons at 80 or 90 psi were quicker
> than the same tyres at 100 psi (roughly 5.6, 6.3 and 7 bar).
That was interesting. Low pressure should also make it easier to maintain
balance on a python. Problem is that stretches of gravel turns up when you
least expect it. Pumping is tedious work.
Olaf============================================================
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