<br />I don't see how you work that out. There are the same number of pins on a full chain. On a normal chain each link consists of an inner and an outer with 2 pins. Half links are shorter and have one pin, but you need twice the number for a chain.<br />
Ahh, you are correct Sir ;-)
So it's purely a material thing, I get about 5K miles on the Izumi track chain I use these days, used to get a lot less on KMC's I used before.
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Dan