Originally Posted by
HillRider
I believe you need to study the economics of this idea. Why use $150 worth of chains to protect a $70 cassette?
The chains are rotated not replaced. The aim is to use the same number of chains per cassette as using a single chain at a time and replacing when stretched.
Rotating avoids having to measure chains and gives plenty of time for the dirty chain to be cleaned and lubed before its needed again.