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Cateye Strada - Wheel size

robbiemagicrobbiemagic Posts: 132
edited July 2008 in MTB workshop & tech
I have recently bought a new bike and the tyres are 26 x 2.4, i have lost the instructions to my Cateye comp. so how do i change the wheel size and what would it be for a tyre this size? any help would be greatly appreciated!
"Second place is the first loser"
Orange Five SE
Orange P7 one

Posts

  • DazzzaDazzza Posts: 2,364
    http://www.cateye.com/en/manuals/66
    The trouble with having an open mind, of course, is that people will insist on coming along and trying to put things in it.
    Giant Anthem X
  • robbiemagicrobbiemagic Posts: 132
    Cheers, it doesnt have the figure for 26 x 2.4, is there an easy way to calculate this ?
    "Second place is the first loser"
    Orange Five SE
    Orange P7 one
  • xtreemxtreem Posts: 2,965
    Yes. It's very simple. Mark the tire with a pen on one side.
    Then draw a line on the ground, and from where the line is
    on the tire and the ground start pushing the bike foward so the
    wheel to make one revolution. Draw another line on the ground where
    the line on the tire touches the ground. At the end measure the distance
    between the two lines on the ground, in mm, and enter it in the comp.
    For 26 x 2.35 wheel is 208mm. My predictions would be 208 or 209mm.
    NS Bikes Eccentric Alu custom - 2016
  • stumpyjonstumpyjon Posts: 4,069
    I've just set up a new Cateye wirless Strada and found the sizing to be a bit on the large size. Did my normal loop that my old computer, GPS and Tracklogs all independantly clocked at 10.7 miles, cateye clocked it at 11.0. I've now pro-rated my wheel measurement down. Haven't had a chance to properly measure the wheel yet.
    It's easier to ask for forgiveness than for permission.

    I've bought a new bike....ouch - result
    Can I buy a new bike?...No - no result
  • xtreemxtreem Posts: 2,965
    I think you can never set up a comp. acurately. Because if you run the tire
    at smaller PSI that means that the radius of the tire is smaller when you are
    riding the bike, and if you set it on 208mm, you are probably doing, lets
    say 203mm. Do you know what I'm trying to say?
    NS Bikes Eccentric Alu custom - 2016
  • stumpyjonstumpyjon Posts: 4,069
    Still think the listed circumfrances on the cateye instructions are a bit out. Fitted my other cateye to the other bike last night (2.1 tyres) and ran it next to my GPS, still came up high on the mileage. On good thing I will say though is the cateye seems to much more immune to interference. My old Trek Incite 8i used to go mental if it was next to my GPS, would clock speeds of 60 mph when stationary :shock:

    Xtreem, understand what your saying, run the tyres at a lower presure and you effectively reduced their circumfrance.
    It's easier to ask for forgiveness than for permission.

    I've bought a new bike....ouch - result
    Can I buy a new bike?...No - no result
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