So Shimano have gone back to using a symmetrical chain design for Dura Ace 9000- is this pretty much an admission that the 7900/6700 generation of asymmetrical chains was a shitty idea?
It has just occurred to me that I can’t rotate my 6700 chain on my road bike as a way to maximising the life. This was an evil corporation plan to make you buy more chains, right?
The new Dura Ace 11-speed chain is no longer directional, has hollow rivets for a low weight and a PTFE coating for soft switching operations. The CN-9000 is also characterized by a higher durability compared to the CN-7900.
So they admitted 6700/7900 are crap,
But will you need a special $300 tool to remove them like campy, need to put the pin in from the back and can you run a 9000 on 7900?
I only care because the old boy runs shimano/SRAM
If you want to get maximum cassette life you need to bin the chains log before they start wearing…
I change my campag 11 chains at 3500-4000kms
Doing so can extend the cassette life by up to 40%
Not bad when a SR cassette cost $300 on a good day
^This, I also don’t degrease my chains any more with the hollow links.
I just wipe down with some wax and grease remover and re apply teflon lube, then bin it and get a new one when it gets about 3500-4000k.
I found once its degreased well it never lubes up the same with out soaking it, this requires removing from the bike and putting in another joining pin.