[RBW] Optimal tire pressure questions...

2013-01-19 Thread René Sterental
Since I'm a heavy guy, the spreadsheet that has been posted for all to
determine the optimal tire pressure has been very usefull for me,
particularly as all my bikes have different tire widths/sizes. However,
last week I ran into a couple of issues with this chart that I'd like to
see how everyone else has addressed:

1) Does tire size (650b, 700c, etc.) affect the optimal pressure for a give
tire width?
2) If you are a very light person, for wider tires you get some ridiculous
low number, like 7lbs. How do you determine the lowest pressure to use in
these cases?
3) Can I extrapolate these values to tubeless MTB tires as well?

Any extra feedback is welcome!

René

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Re: [RBW] Optimal tire pressure questions...

2013-01-19 Thread Jim Mather
On Sat, Jan 19, 2013 at 1:23 PM, René Sterental orthie...@gmail.com wrote:
 3) Can I extrapolate these values to tubeless MTB tires as well?

Tubeless tires run significantly lower pressure than tubed. I'm 225
lbs, and on dirt I run 25 psi tubeless when I would be running at
least 40psi with tubes.

jim m
wc ca

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