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Thread: Tyre pressure

  1. #1
    Senior Member kamtsa's Avatar
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    Tyre pressure

    What tyre pressure provides good balance between rolling resistance and comfort?

    This is for 20x1.5 Marathons. They are specified as 40-100psi.

    Thanks,

    Kam

  2. #2
    Galveston County Texas 10 Wheels's Avatar
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    You would be the one to decide what is best for your comfort level.
    Try different psi 's on the same road.
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    Senior Member kamtsa's Avatar
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    Quote Originally Posted by 10 Wheels View Post
    You would be the one to decide what is best for your comfort level.
    Try different psi 's on the same road.
    I hoped for slightly more info than that ;-)

    Can you tell me about your experience?

    Kam

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    Bicycling Gnome
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    Quote Originally Posted by kamtsa View Post
    I hoped for slightly more info than that ;-)

    Can you tell me about your experience?

    Kam
    I'll give you some conjecture and a little bit of anecdote.

    I put 20x1.75 marathons on my Moulton TSR and they were very satisfactory. A bit slower than the stelvios that it came with. The moulton has suspension front and back and I blew them up rock hard and they were great. However, had I not had suspension, I might have found them a rough ride. The bike was very sure footed with the tyres at 100psi (measured on my workshop pump so a bit of plus or minus could be applicable and I don't know which).

    I would say just try different pressures and evaluate the speed against rough ride continuum. I bet they'd be fine at about 55 psi on an unsuspended bike, but you'll have to try it and see. There are so many variables in the rider's preference / road surface / tyre pressure / tyre type equation that I doubt anyone can just give a simple answer.

    Anyway - experimenting is fun and passes the time.
    Last edited by EvilV; 03-28-09 at 01:31 PM.
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    Senior Member gregstandt's Avatar
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    Here's an excellent article written by Sheldon Brown discussing tire pressure and other tire issues.
    http://www.adventurecycling.org/reso...rown_tires.pdf
    There is also an article this month in Adventure Cyclist on tire pressure but I didn't see it available online yet.
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  6. #6
    cab horn
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    Quote Originally Posted by kamtsa View Post
    I hoped for slightly more info than that ;-)

    Can you tell me about your experience?

    Kam
    Optimal tyre pressure depends on road condition and total weight of rider/bike and desired comfort level.
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  7. #7
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    I'm one of the 'fat tyre run soft' gang. Big Apples or an equivalent run at 20 - 35 psi for me. Anything else is too harsh for the less-than-perfect London road surfaces.

  8. #8
    PDR
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    Im running with Schwalbe Kojaks on the Dahon and Schwalbe Stelvio on the Brompton... both pumped up near the max @ 100 psi. Speed over comfort for me

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