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Old 08-14-11 | 09:40 AM
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tsl
Plays in traffic
 
Joined: May 2006
Posts: 6,971
Likes: 15
From: Rochester, NY

Bikes: 1996 Litespeed Classic, 2006 Trek Portland, 2013 Ribble Winter/Audax, 2016 Giant Talon 4

I use the chart at PSI Rx as a starting point and experiment from there.

There's also a calculator based on it here.
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