Im buying a new mech (online) tomorrow either the the xtr shadow+ m985 or m986 but i cant tell what the difference is. I have had a Google but i'm none the wiser. I believe one is direct mount but i'm not sure if its a adapter so it can be used on both.
There is a bit of info on the thread on the link below which is the only comparison I have found
http://forums.mtbr.com/drivetrain-shifters-derailleurs-cranks/xtr-m985-vs-m986-difference-820478.html
I have a 2008 giant trance which has a standard threaded mech hanger.
It would be great if someone could confirm before I buy it.
I would love to buy it from my lbs but they said they can knock a bit of rrp but not enough to compete with the £121.50 i can get for online.
Regards
Andy
M986 is the new direct mount. You'll be wanting the M985.
I've snapped two M985s in two rides the last couple of weeks. Might stick with XT for a while....? 🙁
M986 was revised slightly from M985 and is direct mount compatible. It basically means you can remove part number 1 [url= http://techdocs.shimano.com/media/techdocs/content/cycle/EV/bikecomponents/RD/EV-RD-M986-3430_v1_m56577569830801193.pdf ]on this diagram[/url] and put it straight onto a frame designed for direct mount. If you are running a normal hanger then you can use either mech quite happily.
Thanks for the replies.
Where and how did you snap them?
Think I may go for the m986 to future proof it a bit if it lasts till a frame change.
Second snap was a stick through it at Drumlanrig, would have done any. First snap was the weird one: just pedalling slowly up a technical rocky climb when it went for no apparent reason. I'm still a bit suspicous of whether clutch mechs can handle the suspension action whilst pedalling under a lot of pressure?
I just snapped one recently too. One of the linkage arms gave way and no sign of any collision.
Again, I'm left wondering whether there's something wrong with the mech or whether it was a factor of chain growth. I thought I had a reasonable amount of slack in the chain to allow for that.. it wasn't as if I was in the largest rear sprocket.