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Re: [ST] tire pressures
- Subject: Re: [ST] tire pressures
- From: "collett_mc" <collett_mc@xxxxxxxxxxx>
- Date: Sun, 10 Aug 2003 17:54:19 -0400
Another rule of thumb is to calculate what you need based on the max load /
max pressure markings on the sidewall. It takes some figuring ... but for
example if your tire says max load 500 lbs @ 50 psi (just an example) and
you can estimate the load on your rear tire (also taking into account weight
distribution) at 300 lbs, then try a pressure of 3/5 of the max = 30 psi.
Then adjust based on handling / wear needs.
Personally, I always run the rear at 42 psi all the time. I'm 220 lbs and
50 % of my riding is with the luggage and my wife, so I need the least
carcass flex I can get. I still only get 4000-5000 miles out of my Macadam
100Xs. Interested to hear what folks think about the Pilot Road...
Mark Collett
Proverbs 3:5,6
><//>
- ----- Original Message -----
From: "Craig Tate" <craigtt@xxxxxxxxxxxxx>
To: <ST@xxxxxxxxxxxxxx>
Sent: Friday, August 08, 2003 4:46 PM
Subject: Re: [ST] tire pressures
> Colin,
> Did the guru recommend 31-34 for the front and rear tires?
> Craig
>
> At 10:26 AM 8/8/2003 -0700, you wrote:
> >Hi,
> >
> >I recently participated in a workshop run by a well-respected SF Bay area
> >club racer and suspension guru.
> >
> >The issue of "correct" tire pressure came up, and he re-iterated that the
> >pressures listed on the tires are maximums and are generally appropriate
> >for a fully loaded motorcycle. On my ST, I therefore run 36 psi front /
42
> >rear (cold) when I have the bags on and am carrying a passenger.
> >
> >He also said that tire manufacturer websites and/or the bike owners
manual
> >(for stock tires) used to list the recommended pressures for "normal" use
> >(a single rider and no luggage). However, he said that due to our
> >increasingly litigious social environment most manufacturers have stopped
> >this practice and now provide only the maximums. The lawyers were
> >apparently afraid people would use the normal pressures when the bike was
> >fully loaded. He acknowledged that this makes it very difficult to
> >determine the recommended normal pressures.
> >
> >As a rule of thumb, he said for 31-34 psi (cold) was generally a good
> >starting point for sporty street bikes. Add a few pounds for better
> >mileage/longer wear/less traction; subtract a few pounds for better grip;
> >use the recommended max psi when the bike is loaded.
> >
> >Made sense to me...
> >
> >Colin
> >00 Sprint ST
> >01 Guzzi Rosso Mandello
> >
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