Tyre numbers for bike pc?

[col]

Having got a pc for each of my bikes I found the vituoso was easy to put the tyre and wheel size in, thats is 700 x 25 two numbers only. Now on my Royal there are the first two, 700 x 38c which isnt on the table to put into the pc, then there is this one, 28 x 1 5/8 x 1 1/2, Im just not sure which of the two fraction numbers have to go in? help please.

 

[4F]

Measure 1 roll of the wheel and put that figure in or the cateye enduro 8 manual has a 700 x 38 wheel as 3180

http://www.cateye.com/sites/cateye/upload/manuals/en/CC-RD400DW_ENG v2.pdf

 

[col]

I dont think I can do that with these computers, they have a chart with wheel sizes on, then the relevant number to put in. There is a 28 x 1 1/8 x 1 5/8, and a 28 x 1 1/2, Im a little unsure about which one to put in?

 

[4F]

Which bike computer is it that you have Col ?

 

[col]

Its this one, the list of sizes and what to put in seem fixed, I dont think I can customise the numbers input?

http://www.halfords.com/webapp/wcs/..._productId_196877_langId_-1_categoryId_165741

 

[4F]

Hi Col, according to the manual it will http://www.halfords.com/wcsstore/libraries/document/cycle658526.pdf

The setting value is the figure you want

 

[col]

Hi Col, according to the manual it will http://www.halfords.com/wcsstore/libraries/document/cycle658526.pdf

The setting value is the figure you want

Thanks, I have this manual and couldnt see where it says another input value could be put in, I must have missed it, will try tonight , thanks again.

 

[4F]

Thanks, I have this manual and couldnt see where it says another input value could be put in, I must have missed it, will try tonight , thanks again.

No problem although that manual does not give the 700 x 38 size so you can either take a a middle number between 700 x 35 and 700 x 40 which should be "about right" or measure the wheel by rolling it.

 

[col]

No problem although that manual does not give the 700 x 38 size so you can either take a a middle number between 700 x 35 and 700 x 40 which should be "about right" or measure the wheel by rolling it.

I skimmed over the instuctions as I was setting it up, and seeing the list and input numbers for the sizes shown assumed they couldnt be changed, you know cos I "knew what I was doing"