I seem to remember (and confirmed through the owners manual) that the Scalpel (2007 or older) has a certain amount of chain sag in the lowest cogs. I've converted mine to a singlespeed and am using a Pauls tensioner. I want to be sure that I have the correct amount of sag (i.e. chain length) for my different cogs.

Could someone please measure the distance from the chainline to chainstay when in the following combinations:

34x16
34x18
34x20?

Perhaps a picture to show where you measured (if you have time).

Thanks team!

Daniel