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  1. #16
    Join Date
    May 2008
    Location
    northern Virginia
    Posts
    5,897

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    I came up with 99 from the equation, but I've been inflating my 700x23 tires to the max of 120 psi for several years now with no problems, and I prefer them with max pressure. When I has the Vittoria Open Corso tires, I inflated them to 130 which I think might have been below the max.

  2. #17
    Join Date
    Apr 2005
    Location
    Vancouver, BC
    Posts
    3,932
    I can't remember who but it was someone here who said that the max inflation printed on tire is the result of an argument between the marketing people (who want a higher number there because the racers willing to pay $$$ for tires want to put 140 psi in there) and the legal people (who don't want to be sued because people see their tires poppin' off their rims when they're too inflated).

    Made a lot of sense.

  3. #18
    Join Date
    Apr 2009
    Location
    Illinois
    Posts
    191
    Quote Originally Posted by Pedal Wench View Post
    My BF just sent me this:
    Tire Width=20: Pressure(psi) = 0.33 * Rider Weight in lbs + 63.33
    Tire Width=23: Pressure(psi) = 0.33 * Rider Weight in lbs + 53.33
    Tire Width=25: Pressure(psi) = 0.33 * Rider Weight in lbs + 43.33
    Tire Width=28: Pressure(psi) = 0.33 * Rider Weight in lbs + 33.33
    My tires are 26x1.95 so what size is that? Inches to mm? Bike tire sizing is a new world to me at this point, kind of confusing.

    Does anyone have an inflation chart for larger tires like mine?
    "A bicycle does get you there and more. And there is always the thin edge of danger to keep you alert and comfortably apprehensive. Dogs become dogs again and snap at your raincoat; potholes become personal. And getting there is all the fun."

  4. #19
    Join Date
    Apr 2005
    Location
    Vancouver, BC
    Posts
    3,932
    Quote Originally Posted by Heifzilla View Post
    My tires are 26x1.95 so what size is that? Inches to mm? Bike tire sizing is a new world to me at this point, kind of confusing.

    Does anyone have an inflation chart for larger tires like mine?
    Just inflate them to the max that's printed on the sidewall.

  5. #20
    Join Date
    Sep 2007
    Location
    Uncanny Valley
    Posts
    14,498
    Fat tires are multi-surface tires.

    I'll leave it to people who actually ride off-road to discuss the subtleties of tire pressure selection. Definitely max pressure for road riding, and generally the softer the surface, the softer the tires.
    Speed comes from what you put behind you. - Judi Ketteler

  6. #21
    Join Date
    Jan 2006
    Location
    Pacific Northwest
    Posts
    3,436

    Sheldon said....

    "My predominant feeling is one of gratitude. I have loved and been loved;I have been given much and I have given something in return...Above all, I have been a sentient being, a thinking animal, on this beautiful planet, and that in itself has been an enormous privilege and an adventure." O. Sacks

  7. #22
    Join Date
    Apr 2009
    Location
    Illinois
    Posts
    191
    Quote Originally Posted by OakLeaf View Post
    Fat tires are multi-surface tires.

    I'll leave it to people who actually ride off-road to discuss the subtleties of tire pressure selection. Definitely max pressure for road riding, and generally the softer the surface, the softer the tires.
    Does the rider's weight have any bearing? I am not exactly a lightweight.

    Thanks.
    "A bicycle does get you there and more. And there is always the thin edge of danger to keep you alert and comfortably apprehensive. Dogs become dogs again and snap at your raincoat; potholes become personal. And getting there is all the fun."

 

 

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