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Old 08-16-12, 05:18 PM   #1
Deetox
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Are Shimano SL-440 flar bar shifters compatible with my derailleurs?

Hello there, (sorry for the spelling mistake in my title, the word I was looking for is FLAT not flar lol)

Anyway I would like to ditch the Aero bars + bar end shifters on my 2 x 8 road bike and install some Shimano SL-440 flat bar trigger shifters but I'm not too sure if they would be compatible with my derailleurs. My RD is a Shimano XTR RD-M960 Rapid Rise and my FD is either a Dura Ace FD-7700 or 7800, kinda hard to tell exactly which.

Can someone kindly shed some light on this for me?

Thank you,

Last edited by Deetox; 08-16-12 at 05:22 PM.
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Old 08-16-12, 09:09 PM   #2
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Your rear derailleur will work, but your front won't. You'll need a front derailleur from Shimano's flat-bar-road lineup. The cable's attachment point is considerably further from the pivot than a "real" Shimano road FD, and the shifters are built to match.
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Old 08-16-12, 10:44 PM   #3
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Your rear derailleur will work, but your front won't. You'll need a front derailleur from Shimano's flat-bar-road lineup. The cable's attachment point is considerably further from the pivot than a "real" Shimano road FD, and the shifters are built to match.

Exactly so. The "flat-bar" shifters use the same cable travel as Shimano's "mountain" shift levers. (I've used them interchangeably.) This is no problem on the rear derailleur, but the "mountain" front uses more cable movement than the "road" front. You could play with the derailleur stops and cable position to get it to work with the Dura-Ace double, but the "correct" derailleur is a FD-R770 flat-bar double front: http://harriscyclery.net/product/shi...d7001-qc49.htm
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Old 08-17-12, 07:25 PM   #4
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Great thanks for clearing that up. Really appreciate it.

One other question, would it be possible for a Deore XT SL-M780 left side 2/3x shifter to work in pairing with a right side SL-440 8 speed shifter? (or a different 8 speed MTB right shifter?) I ask because the SL-M780's are rated for 2/3 x 10 but if I only use the 2/3 half then the x10 half should no longer apply right? Each shifter functions completely independent from one another? If that is the case would installing an 8 speed MTB FD make the above shifter combo work on my bike or would the special flat-bar-road FD still be required? From my research it looks like the FD-R440A is the one I should probably get, its rated for 8 speed while the R770 is 10 speed. http://www.shimano.com.au/publish/co...-.fd_road.html

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Old 08-17-12, 08:31 PM   #5
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I believe the indexing might line up with a mtb FD, but if you have road-sized chain rings (like 50 or 53 tooth big ring) then the shape of the derailleur will not be right and it may be difficult to get it set up properly. Strictly speaking, if you have road sized chainrings then you really should get a road derailleur.
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Old 08-17-12, 11:46 PM   #6
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I believe the indexing might line up with a mtb FD, but if you have road-sized chain rings (like 50 or 53 tooth big ring) then the shape of the derailleur will not be right and it may be difficult to get it set up properly. Strictly speaking, if you have road sized chainrings then you really should get a road derailleur.
Thanks yeah its a 53 ring so I guess I'll have to get the FD-R440A then. So with that FD installed the SL-M780 left shifter and SL-R440 right shifter should work together? Just wanna make sure.
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Old 08-18-12, 10:55 AM   #7
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Thanks yeah its a 53 ring so I guess I'll have to get the FD-R440A then. So with that FD installed the SL-M780 left shifter and SL-R440 right shifter should work together? Just wanna make sure.
I am not sure if the flat bar road front derailleurs work perfectly with mtb shifters. It makes sense that they would, but I don't know.
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Old 08-18-12, 11:42 AM   #8
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Basically all flat bar drivetrain components are MTB components. As mentioned before, the problem with running a regular MTB front derailleur is not the indexing, it's the shaped of the cage (made to shift 46-42T chainrings). Otherwise all Shimano flatbar and MTB (except the new 10 mtb 10 speed parts) will play together. With the new Dyna Sys 10, only the front shifter and derailleur are backwards compatible; so yes a Dyna Sys 10 left (front derailleur) shifter will work with a flat bar front derailleur and there is no issue mixing and matching front derailleur /shifters with rear derailleur/shifters of different kinds.
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Old 08-18-12, 01:18 PM   #9
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Basically all flat bar drivetrain components are MTB components.
All except the R series components, the R440 Rapidfire Plus are designed to be used with road F/R derailleurs, I ran R440-8 with Sora 8 speed FD and a 53-39 crank for a couple of years where it shifted perfectly as it was designed to do all the time. Dynasys is different as mentioned as well.
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Old 08-18-12, 08:25 PM   #10
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All except the R series components, the R440 Rapidfire Plus are designed to be used with road F/R derailleurs, I ran R440-8 with Sora 8 speed FD and a 53-39 crank for a couple of years where it shifted perfectly as it was designed to do all the time. Dynasys is different as mentioned as well.
Well yes and no. Pretty much all the Shimano rear derailleur and rear shifters, MTB or Road will play together; because if this, Shimano doesn't even offer an R series rear derailleur as practically any Shimano rear derailleur will work. It is the Front Derailleur that needs a specific shifter, to say "All except the R series components, the R440 Rapidfire Plus are designed to be used with road F/R derailleurs" is factually incorrect; the R series are the flat bar series and it is well documented that they are cross platformed with MTB front derailleurs, not road front derailleurs (as I mentioned before, the R series front derailleur is a MTB cable pull derailleur with a cage designed for bigger chainrings;52 or 53). While I have heard the you can tune a road front derailleur to work with an R series shifter, it only works with a double and it requires the cable to be loose on the low side and a slight overshift on the high side; while it may work to your satisfaction, they are not designed to work together.

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Old 08-19-12, 05:33 AM   #11
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Thanks very much guys, you're awesome. Safe to say I picked the right forums to join.
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Old 08-19-12, 10:16 PM   #12
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I am not sure if the flat bar road front derailleurs work perfectly with mtb shifters. It makes sense that they would, but I don't know.
They do. That's the setup on my wife's bike. Believe me, I'd hear about it if it didn't work perfectly.
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