Originally Posted by LukasM
While it is true that a 525 chain will be stronger than a 520 of the same grade, even DID itself sells a 520 chain that will outlast and be stronger than the 525VM2. Check out the 520ZVM-X. Best wearing will be the 525ZVM-X but I also prefer the more commonly available 520s.
Yes, those are the latest DID products. I'm sure they are very good, probably better than the VM-2 which has been around now for over 10 years. How many miles can you get out of the ZVM chain? Maybe 30,000 miles?
I've had such good luck with the VM-2 ... on several bikes ... I've just stayed with them. They are also a bit cheaper than the newer ZVM chains.