Shimano MTB Rear Derailleurs ?

[cnighbor1]

Shimano MTB Rear Derailleurs ?
I seen Delore and XT rear derailleurs used on a road bicycle to increase gearing range
I want to use one if it works correctly on my Caylor road frame

But when I go to web I can't figure out which RD Model mounts and installs the same has a road RD
The word shadow is used a lot
What ever that means
Thanks for any inslight
Charles

[AngryScientist]

charles - what shifters are you using on that bike...??

[oldpotatoe]

Shimano MTB Rear Derailleurs ?
I seen Delore and XT rear derailleurs used on a road bicycle to increase gearing range
I want to use one if it works correctly on my Caylor road frame

But when I go to web I can't figure out which RD Model mounts and installs the same has a road RD
The word shadow is used a lot
What ever that means
Thanks for any inslight
Charles

You need a 9s shimano MTB rear der. Non shadow is best(lower profile, no barrel
Adjuster)...deore is a great one. I can find a pic later.

https://m.youtube.com/watch?v=mpGPzVOiJO4

But 9s, not 10s. 10s MTB rear ders not compatible with shimano 10s road shifters.

[eddief]

If you're using big cassette, suggest SGS long cage:

http://www.artscyclery.com/descpage-SH591RDTNB.html?gclid=Cj0KEQiAyuPCBRCimuayhb3qqvwB EiQAgz62kSVeXOxeM9Yqg4UvytiIi75bcuWzNSBG3ay_QNKwn3 waAu3k8P8HAQ

[kam]

My buddy has a xt 11-42 cassette on his niner BSB cx bike. I helped him build it out.

We went with;
Wolftooth tanpan adapter
Xt Med cage rear derailleur
Xt 11-42 cassette
Shimano 105 shifters
42t Woolf tooth dropsstop front chainring

His bike is 1x11, so the Med cage would work.

If you using 2x11 then I think you'll have to go with a long cage rear der.

Shadows refers to the shape of the rear der....its low profile to make it less prone to damage during riding.

Hope this helps.

[moobikes]

Charles, what shifters are you using? I assume indexing.

Prior to 10 speed MTB models, all 8 and 9 Shimano MTB rear mechs will work fine with 8, 9, 10 road shifters with no mods necessary. The exception is, if you are using 74xx series Dura Ace shifters. Those, IIRC, require the MTB mech to use the alternative cable clamp position in order to shifter correctly.

If you are using 7 speeds, then 7 speed MTB mechs from any indexing MTB group will work fine.




Shimano MTB Rear Derailleurs ?
I seen Delore and XT rear derailleurs used on a road bicycle to increase gearing range
I want to use one if it works correctly on my Caylor road frame

But when I go to web I can't figure out which RD Model mounts and installs the same has a road RD
The word shadow is used a lot
What ever that means
Thanks for any inslight
Charles

[cnighbor1]

charles - what shifters are you using on that bike...??

Dura Ace Bar end 9 speed

[Mikej]

Shadow means it doesn't stick out to the side as much, it has a bit a different geometry it acts on. Shimano mtb rd may not play well with a bar end shifter.

[David Tollefson]

Shadow means it doesn't stick out to the side as much, it has a bit a different geometry it acts on. Shimano mtb rd may not play well with a bar end shifter.

Unless said bar-end shifter is run in friction mode.

[moobikes]

Then you can use any Shimano MTB rear mech, 7, 8 or 9 speed compatible, from any year, any model and it will index to 9 speed.

Avoid any MTB rear mechs that are designed for 10 speed.


Dura Ace Bar end 9 speed

[dave thompson]

Shadow means it doesn't stick out to the side as much, it has a bit a different geometry it acts on. Shimano mtb rd may not play well with a bar end shifter.

9-speed Shadow MTB rear ders work perfectly with 9 or 10-speed Shimano bar-ends in index mode as well as 9 or 10-speed STI shifters. The primary downside of a Shadow derailleur is that it has no barrel adjuster on it.

[Epicus07]

I used Dura Ace Bar Ends with a Deore Rear and it worked beautifully! Nice crisp shifts.

[Mikej]

Well I stand corrected 😊

[NHAero]

I have XT and XTR rear derailleurs with DA 9 speed barcons on three road bikes, my Big Dummy, and an old Klein MTB using DA barcons on thumbies, all in index mode and they work perfectly. I'm pretty sure the models are RD-M750 and RD-M952. Makes me think I should be putting one or two in the parts drawer!

[oldpotatoe]

Here

http://www.ebay.com/itm/NOS-Shimano-Deore-XT-9-Speed-Rear-Derailleur-RD-M750-Long-Cage-New-in-Box-/112242023096?hash=item1a22255ab8:g:jVUAAOSwa~BYWAM j

[rccardr]

I've also had good luck using Shimano 600 and 700 series Deore RD's with later 9 and 10 speed indexed shifters. Wider cage doesn't seem to be a problem, they still shift nicely.

They blend better visually with older components because they are less organic shaped & have more polished surfaces.

[kingpin75s]

Dura Ace Bar end 9 speed

Good choice. I run them on almost every geared bike I have, Mountain, road and in between.

For value and current availability I like the M771 RD. As others have clarified, indexing is perfect.

http://www.chainreactioncycles.com/us/en/shimano-xt-m771-9-speed-rear-mech/rp-prod20698

[RudAwkning]

These are awesome if you want to run a wide range drivetrain on a drop bar bike. Fully Dyna-Sys compatible so you can run a clutch rear derailleur and avoid chainslap when on rough roads.

10 speed version
http://www.microshift.com.tw/BS-M10.html

11 speed version
http://www.microshift.com.tw/BS-M11.html

They feel every bit as solid as Shimano road barends. Same molded plastic tips. Would not be surprised if they're made in the same factory.

Use these and you don't need a Tanpan or hanger dropper (both of which great when using STI levers).

[bobswire]

Charles, keep your eyes open for XTR M952, can be had for under $50 on ebay and well worth it. Very industrial looking,goes well with bar ends and all manner of shifters up to at least 9 speed,maybe 10 with bar ends.

[Gummee]

Charles, keep your eyes open for XTR M952, can be had for under $50 on ebay and well worth it. Very industrial looking,goes well with bar ends and all manner of shifters up to at least 9 speed,maybe 10 with bar ends.

My Crosshairs had an otherwise all XTR M952 group shifting using Shimano road shifters. Started out life as a 9sp, then went 10sp by changing shifters. Now it's 11sp, but that required new parts (6800)

Microshift is also making 10sp thumb shifters and Paul's is using them on their thumbies. IIRC you can get Thumbies in road diameters.

M

[NHAero]

Do these work better than one of the older 9 speed M750 or M952?
What about the RD-M771 vs. the Shadow RD-M772 with the direct cable pull?

Good choice. I run them on almost every geared bike I have, Mountain, road and in between.

For value and current availability I like the M771 RD. As others have clarified, indexing is perfect.

http://www.chainreactioncycles.com/us/en/shimano-xt-m771-9-speed-rear-mech/rp-prod20698

[dave thompson]

Do these work better than one of the older 9 speed M750 or M952?
What about the RD-M771 vs. the Shadow RD-M772 with the direct cable pull?

No difference that I've found. I replaced a toasted XT rear der with a Shadow and nothing changed.

[kingpin75s]

Charles, keep your eyes open for XTR M952, can be had for under $50 on ebay and well worth it. Very industrial looking,goes well with bar ends and all manner of shifters up to at least 9 speed,maybe 10 with bar ends.

Good recommend as well. This is what I actually run vs. what I recommend for new, affordable and available. If you do not mind some scratches they can be had in functionally good condition as stated above. Great RDs! If you need mint or NOS, these go for quite a bit more.

[vitaly66]

Running the XT M772s on two roadish bikes here, one medium cage, one long cage, both with 9-speed dura-ace barcons, shifting is all good.

The "shadow" designation of the m772 just means the derailleur body tucks in a little tighter below the chainstay. Otherwise, both m771 and m772 work fine with 9-speed road shifters.

As I understand the nomenclature, the point where mountain derailleurs and road shifters part ways is with anything described as "dynasys".

[NHAero]

I appreciate this thread, as it reminded me I have six bikes in the fleet between my wife and I that have either M952 or M75x derailleurs and no spares, so I just ordered a RD-M772 to put in the drawer. Five are paired with DA barcons but I have a couple of sets of those in the drawer!