Low Tire Pressure



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Thread: Low Tire Pressure

  1. #1

    Join Date
    Aug 2011
    Location
    Toronto
    Posts
    368

    Low Tire Pressure

    Hello everyone,

    I bought my bike 2nd hand in June. For some reason I never thought to check the tire pressure, just figured it was fine. I got my tire pressure gauge the other day, and man was I wrong. My pressure is suppose to be 33 front/36 rear, and it was 15 front/22 rear. It was presumably this way ever since I got the bike, and because the previous owner didn't really use it (2008 model with only 3,700km when I bought it) I can venture a guess and say the tires have been under-inflated for a very very long time.

    So I just inflated them to the right PSI (or as close as I can get), tomorrow morning I'll go check to make sure they've held the air. I guess my concern is, is there any danger in running these tires? To have them under-inflated for what could have been years, and then suddenly pump them up and carry on.. seems risky to me. The tread is still looking great, and they don't seem to have any cracks or anything suspicious looking.


    ALSO, I suppose I learned to ride on woefully under-inflated tires. Should I be expecting a noticeable change in the way it runs and corners?

  2. #2
    jeero's Avatar
    Join Date
    Nov 2008
    Location
    St Catharines
    Posts
    1,391

    Re: Low Tire Pressure

    Tire pressure will fluctuate throughout the year, especially when it gets hot and cold often, such as the weather of september.
    This is why checking your tire pressure is a recommended pre-ride inspection for every time you want to take the bike out.
    Check any motorcycle manual, or car manual, and checking tire pressure will be one of the most common things you should be doing.

    As far as your worry about the tire now, check for heavy uneven wear and cracks in the rubber.
    I personally think the above will be highly unlikely.
    If all is good (no cracks or heavy uneven wear) then go out and enjoy the ride.
    Remember that with the temperatures of this time of year, a lot of things will fluctuate and its your responsibility to keep checking.
    "It's only once you've lost everything that you're free to do anything." - Tyler Durden

    2005 SV650S : Mar 2011 - Oct 2011

  3. #3
    DemonPig's Avatar
    Join Date
    Mar 2009
    Location
    Clarkson
    Posts
    1,497

    Re: Low Tire Pressure

    Tires are fine. It's almost impossible to ride a bike with pressure low enough to ruin the tire. Unlike a car. The bike wouldn't be stable enough.
    Nevertheless, if that were the case, the tires would be powdered on the inside and on the outside you'd see a stress line(s) running parallel to the rim.
    The only thing is, the profile of the tire may have been affected by running on low for a prolonged period of time due to a larger contact patch than recommended. Even so, I highly doubt it would be that noticeable.

    1999 Magna VF750C
    2001 SV650S
    1997 CBR900RR sold
    2005 ZZR-250 sold

  4. #4
    adri's Avatar
    Join Date
    Jun 2005
    Location
    "SNAZZY M/C"
    Posts
    4,933
    Congratulations. You're about to learn what riding a motorcycle is supposed to feel like lol.

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