chain...18/18, 48/4...whats it mean?

[mizgeorge]

Thank you! I knew the second one, but had been trying to turn the first into some sort of gauge, not a fractional inch measurement! That's going to save a lot of mistakes

[ben b]

As a handy guide, here's a list of what those numbers mean in mm wire size:

cooksons number, then its approx MM Eqivelent.

24 = 0.6mm wire
28 = 0.7mm wire
33 = 0.8mm wire
40 = 1.0mm wire
48 = 1.2mm wire
62 = 1.5mm wire
72 = 1.8mm wire
85 = 2.1mm wire


DID U KNOW.....'google' has an automatic calculator?
You can type common expressions into the google search box and it calculates the answer! (eg. type in "2mm in inches" and hit enter)

(see the google 'more' button, or help pages for other 'expressions' and short cut expressions/symbols allowed for this to function)

[lesley]

Aaaah! I knew the second was links per inch but I thought the first was to do with the length of the individual links. Never seemed to make much sense so thanks for the enlightenment.