[Yak] tire pressure as a function of tire width and weight
basignorelli at gmail.com
Tue Apr 5 15:30:14 PDT 2011
Last fall I put a new pair of Schwalbe Supremes (26x1.6) on my LHT and on
the second ride I got a flat on these "supposedly flat proof" tires (tongue
in cheek). It was a bummer but I believe it was completely due to the pile
of crap gravel that I got squeezed into riding through when crossing a
bridge in a turn at rush hour. Oh well... not the tires fault.
I too run my tires around 60 psi.
On Tue, Apr 5, 2011 at 10:47 AM, Vik Banerjee <threeohm at gmail.com> wrote:
> Most people don't get enough flats to draw a whole lot of conclusions from
> them. My GF got two flats in one week of commuting and was ready to buy
> Marathon Plus tires as she felt clearly the supple/fast tires I put on her
> bike had a problem. I told her to just keep riding the same tires. Several
> months later she hasn't had a flat since the two in a row. She isn't a
> powerful rider so she can ill afford to ride slow tires like M+s.
> Unless you are getting dozens of flats on each tire at each pressure
> setting you don't have the data to correlate between pressure/width and risk
> of getting flats.
> The real danger in the situation above is that if she had put slow harsh
> riding M+s ion her bike she would not have had any flats since and would
> have conformed her fears that she need horrible tires to get to work and
> back hassle free - when in fact the flats she got were just random events
> not related to her tires.
> I know my wide low pressure tires are less likely in theory to get a flat
> than a narrower/high pressure tire, but that doesn't mean I won't get two in
> a row next week and if I subsequently switch to M+s that doesn't mean the
> M+s at 300psi is the reason I don't get a flat for 1 year.
> safe riding,
> Vik Banerjee
> threeohm at gmail.com
> On 2011-04-05, at 8:35 AM, Jym Dyer wrote:
> > =v= I've read all of these postings with interest, and I
> > understand the theory, etc. But what I find when the rubber
> > hits the road is:
> > o If I don't pump the tires (or tyres, if you will) up to
> > 100psi, I get flats.
> > o If I use Schwalbe Marathon Plus, at 100psi, I get very
> > few flats (the rubber cement in my patch kit dries up!).
> > o I used to use Schwalbe Stelvios, at 100psi, which did
> > seem zippier but occasionally got flats.
> > o If I use Primo Comets, I get flats no matter what.
> > I don't weigh a whole lot (175lbs is normal for my height),
> > but these are my experiences. Thinner and high PSI works.
> > What's up with that?
> > =v= I've always wanted to try out Scorchers (because, hey,
> > http://scorcher.org/ is me), but never had the opportunity.
> > <_Jym_>
> > ____________
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> Yak at bikefriday.com
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