Originally Posted by
DaveSSS
That's not quite right. The tools will often report .25% wear when a chain is new, but it's due to smaller diameter rollers and/or larger roller clearances. A Shimano or KMC chain may measure .210-.215 inch between the rollers, when new, while a Campy chain only measures .200 inch. The chain checking tool is made to report no elongation with a chain that measures like Campy. Any initial wear is totally false and should be subtracted from future readings.
What do you base this fact on?