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  1. #1
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    Question about flattened tires

    Not flat tires but flattened tires. I'd 6'5" and about 360lbs. Cycling is not not new to me, but the weight is. I have been about 255 most of my adult life. I'm looking to commute to work for some exercise but my tires flatten out when I sit on the bike. I have an older Diamondback Sorrento ridged frame MTB that I've had for 15 years or so. 26"x2" wheels. 65lbs max pressure rating on Kenda hybrid tires. Any suggestions on how to solve this?

  2. #2
    Banned. Mr. Beanz's Avatar
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    26 X 1.25 "SLICK" tires with a psi rating of about 90 psi. They will roll much better and be stiffer (less flattened) . Might be a bit rougher ride but once you're rolling along faster and easier without the added resistance, you'll have a ball.


    Like this Specialized Fat Boy (that is the name of the model, I am not calling you Fat Boy )

    Rates 100 psi I believe. Don't go too cheap on tires, you get what you pay for.


    http://mikesbikes.com/product/specia...re-50191-1.htm

  3. #3
    just pedal donalson's Avatar
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    when it comes to clydes the thing you need to understand is air volume... a larger tire requires less pressure to get similar sag as a smaller tire (one reason on the MTB scene 29ers are so popular)...

    given the same tire construction you will need less pressure on a 2.0" wide tire then a 1.25" tire to have the same sag.


    this is a good article about the subject
    http://www.bccclub.org/documents/Tireinflation.pdf
    mtbr clyd moderator

  4. #4
    Senior Member AWB's Avatar
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    Quote Originally Posted by donalson View Post
    when it comes to clydes the thing you need to understand is air volume... a larger tire requires less pressure to get similar sag as a smaller tire (one reason on the MTB scene 29ers are so popular)...

    given the same tire construction you will need less pressure on a 2.0" wide tire then a 1.25" tire to have the same sag.


    this is a good article about the subject
    http://www.bccclub.org/documents/Tireinflation.pdf
    No to hi-jack the thread, but thanks for the link, definitely a great article.
    -Andy




  5. #5
    Nigel nfmisso's Avatar
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    I run this tire on the back of my commuter:
    http://www.amazon.com/Kenda-K-193-Kw...kenda+26+x+1.5
    at 100 to 110 psi - doesn't flatten with my 300++ lbs.
    Nigel
    Mechanical Design Engineer

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