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    Jan 2004

    ... and if we just ... Mountain Bike Pressure Temperature Calculator V4.0

    Mountain Bike Pressure Temperature Calculator

    Input Parameters
    Riding Pressure Riding Temperature Pump Temperature Temperature Scale

    Output Parameters
    Riding Degrees Kelvin Pump Degrees Kelvin Pump Pressure Deviation

    Just A Little Simple Tool: Illustrating how pressure varies with temperature. Provided your air shock seals are well maintained and the shock is not leaking, shock air pressure is directly proportional to changes in temperature. The formula is P1/P2=T1/T2 where pressure is any one of the standard units and temperature is in degrees Kelvin. Transposing gives P2=(P1*T2)/T1.

    Usage: Record for future reference all current pressure settings. The riding and pump temperatures must be the same, i.e. determine pressure settings during a ride. Use the calculator to compensate for extreme differences in riding and pump temperatures. Enter your riding pressure, riding temperature, pump temperature (typically room temperature) and the calculator will find the pump pressure required to give you the desired riding pressure for the given riding temperature. Clicking Submit reveals that you need to pump to 220psi @ 22c for a riding pressure of 200psi @ -5c.

    Roll Your Own
    From The Menu Bar: View -> Source
    Within your text editor: Save As "mtbPressureTemperatureCalculator.htm"
    Search for "INIT--mtbPressureTemperatureCalculator"
    Delete everthing above this line.
    Search for "FINI--mtbPressureTemperatureCalculator"
    Delete everthing below this line.
    Save again.
    your own calculator
    ( if this, or any alternative method, fails, message-via-email me to receive a copy of the original )

    Mountain Bike Pressure Temperature Calculator V4.0
    Copyright (C) 2004 Michael R Young
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
    published by the Free Software Foundation; either version 2
    of the License, or (at your option) any later version.
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty
    See the GNU General Public License for more details.
    To receive a copy of the GNU General Public License
    write to the
    Free Software Foundation Inc.
    59 Temple Place Suite 330
    Boston MA 02111-1307

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    Last edited by mrdy; 03-06-2004 at 09:51 AM.

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