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  1. #1
    Junior Member krimchick's Avatar
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    Bike Computer Setup

    Hi all.

    I have a Cateye Cordless 7 computer, which I have mounted on my GF Wahoo. The Wahoo has the stock 2.25 by 26 tires on it. The problem: the instructions have the codes for the tire sizes, but 2.25 is not one of the sizes on the chart.

    I've emailed Cateye, but no response.

    Anyone know what I should use? Or just how much of a difference in accuracy will it make if I use something "between" the 2.1 and 2.35 number?

    Any help would be appreciated, as I'd like it to be as accurate as I can get it.

  2. #2
    Elite Rep
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    Well those measurements are only widths. It wont make a huge difference. As diameter is what they really want from you (26"). Just choose the one closest, 2.35.


  3. #3
    Senior Member Ziemas's Avatar
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    Quote Originally Posted by krimchick
    Hi all.

    I have a Cateye Cordless 7 computer, which I have mounted on my GF Wahoo. The Wahoo has the stock 2.25 by 26 tires on it. The problem: the instructions have the codes for the tire sizes, but 2.25 is not one of the sizes on the chart.

    I've emailed Cateye, but no response.

    Anyone know what I should use? Or just how much of a difference in accuracy will it make if I use something "between" the 2.1 and 2.35 number?

    Any help would be appreciated, as I'd like it to be as accurate as I can get it.
    Get two pencils or pens.

    Line up the valve of your tire with one of the pens on the floor.

    Roll your bike in a straight line until the valve is back in the original position.

    Mark the valve again with a pen.

    Measure how far apart the two pens are.

    This is your tire size to enter into the computer.

  4. #4
    Junior Member
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    Quote Originally Posted by Ziemas
    Get two pencils or pens.

    Line up the valve of your tire with one of the pens on the floor.

    Roll your bike in a straight line until the valve is back in the original position.

    Mark the valve again with a pen.

    Measure how far apart the two pens are.

    This is your tire size to enter into the computer.
    Let me just add with your weight on the bike to get even more accuracy.

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