Help with Cateye Velo 8 Bike computer

Berbatov

Hi All,

hope some of you can help me out. Just bought one of these bike computers and although it's easliy installed I'm having a bit of difficulty understanding how to set it up properly. I thought I had done it correctly but when I went out this morning it seemed like my speed was extremely slow and the distance didn't make sense - anyway turns out the distance was wrong by over 16k - which over 50k is a lot out.

Can any of you explain how to set it correctly - wheels on the bike are 700 x 23. Attahced is the section of the manual about this, I may be thick but I need your help!

Tks,

B

penexpers

I haven't used Cateye's before, but for all computers that I have used after you reset it, one of the first things you have to enter is the circumference of the wheel in mm or cm. There's a decent guide to numbers here

http://sheldonbrown.com/cyclecomputer-calibration.html

Cateye Velo 8 - 700 x 23 is 210cm according to this chart

http://sheldonbrown.com/cyclecomp_c.html

rottenhat

It's worth doing a test to see what the actual circumference of your tires proves to be. There's probably instructions in the manual but essentially you start with the valve of the tube at the bottom of the wheel, perpendicular to the ground, mark that point, roll forward until the valve of the tube is back in the same position as it was to start with. Mark that point, and measure the distance between them.

You need to do this with the tires properly inflated (or about how you usually have them if you don't inflate your tires properly) and seated on the bike. It's a lot easier to do this if you someone else with you doing the marking.

Berbatov

It's definetely set to 210, but I must be doing something wrong as it's still miles out!!

blorg

Roll-out is ideal but 210 sounds like ballpark, you would not be 16km out on that.