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  1. #1
    mtbr member
    Join Date
    May 2010

    tire pressure question

    I just bought a Jamis Trail XR. The guy at the LBS said it was fine for my size 6'2" 280.

    Anyway, went riding today and the tire look like they are flattening out under my weight. I checked the tire (27 x 1 3/8) for the max pressure (65 psi) inflated to that but they still look like they are flat.

    Any ideas, bigger tires, inflate to a higher psi?


  2. #2
    mtbr member
    Reputation: Saul Lumikko's Avatar
    Join Date
    Oct 2012
    You can inflate to a higher psi if you have tubes. Exceeding specified pressure with tubeless is a bad idea.

    Wider tires is a good solution.

  3. #3
    mtbr member
    Join Date
    May 2010
    Thanks, I have Sunlite tubes. I'm going to stop at the LBS where I bought the bike and talk to them.

  4. #4
    mtbr member
    Join Date
    Jul 2005
    Your tires aren't flat. They will bulge out a little at the bottom, but they are supposed to do that. You only weigh 30lbs more than me and I ride my mountain bike with just over half that pressure with no problems.

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