Joined Sep 2013
99 Posts | 0+
Aberdeen
Joined Sep 2013
99 Posts | 0+
Aberdeen
Glad I didn't order a sprocket, as I'm totally confused now.
I've measured the inner plates as best I can, and it seems to be 8mm
Which according to a metric to imperial converter is 5/16
Which is 2.5/8
So I suppose I have 525 chain??
Joined Oct 2009
3K Posts | 1+
Joined May 2011
90 Posts | 0+
You do. Chains are measured in units of 1/8th inch (God knows why!) - hence '5 25' means a pitch of 5 X 1/8" (5/8th") and an inner width of 2.5 X 1/8" (or 5/16th" if you like!). Bizarre, isn't it!