To setup bicycle computer you need to find out circumstance of your wheel in mm. Most reliable way I know is the following.


enter some approximate value and call it c0 (circumstance initial)
drive some track of well known length, athletic course, rowing track, 100km ride, anything that has some length and you know long it is. let's call this value dA (distance actual). Make sure that your tires are inflated properly.
read distance measured by your computer with initial value, and call it dM (distance measured)


now you can calculate actual circumstance cA as follows:

cA = (dA * c0) / dM

Bike computer wheel size setup
I have a Dual-Boot USB I created with Multisystem for booting into PartedMagic, Ubuntu 11.10 &amp; Windows 7 Install. Problem is Windows 7 says it cant install on a GPT partition.

Googled, and found that I need an UEFI system (on ASUS H67M-PRO, supports UEFI BIOS, so this shouln't be the problem). I also need to have the correct efi files. I find efi files in my USB, so I think thats fine. But I think the files might not be loaded or something? 

So I am thinking, do I need to do something special to boot into the UEFI installer for Windows 7 or something? For that I need to configure the GRUB on the USB? How?
