Sundig SC-548C

[mints]

I have just joined and my have posted the following question in the wrong place so if you see it in beginners I am sorry.

My computer instructions do not give my tyre size to set the CIRC number to, my tyre is 700 x 45c can anyone please advice.

 

[ArDee]

Cycle computers are normally set up using the distance the wheel rolls ( the wheel circumference);
with the help of a friend sit on the bike with the valve at the bottom
with a piece of chalk get a friend to mark the position of the valve on the ground
roll the bike forward; whilst, sitting on it and when the valve is back at the bottom get the friend to mark the ground with the chalk again
measure the distance between the marks and you probably can enter this figure as the CIRC number into your computer.

 

[mints]

Thank you ArDee, my leaflet givesTyre size then a CIRC number ie 700x20mm 2074, 700x38mm 2180.
My tyre states on it 700x45c.
If I follow your suggestion what unit of measurement should I use to measure the distance between marks.

 

[2Loose]

mm

 

[accountantpete]

It's a small world

http://www.cyclechat.net/threads/700x45c-tyre-inches-installing-computer.100430/

 

[mints]

Thanks to all I now have the unit fitted and working well.