marcpotash

My friends left,(front), double 9-speed Ultegra shifter is skipping shifts. Can a 10 speed left 105 shifter work? I know you cannot sub a 10 speed with a 11 speed but a 9 speed with a 10 speed shifter?

ClydeClydeson

I believe for a double crankset, any Shimano road double shifter will work. The marking on the left shifter of '9 Speed' or '10 speed' or '11 speed' is just an indicator of what right shifter it matches.

Crankycrank

Yes, it will work fine as long as it's a 5600 series 105 brifter. I believe the 5700 10sp series as well as running both cables under the bar tape also has a different pull ratio for the brakes. Not a deal killer for some people as it can be made to work OK with the proper adjustment.

KCT1986

Yes, a 10 speed Shimano left shifter (except Tiagra ST-4700) will work. Note that the shape of the body is different and how the shifter angles away from the bar is different on the newer shifters.

Shimano 11 speed road shifters are different and require a front derailleur that uses more cable pull.

70sSanO

Agree with the above on the ST-R4700 shifter, but is goes beyond that if your friend decides to just get a 9 speed Sora ST-R3000 shifter, or even the ST-R2000 Claris.

Shimano changed the cable pull “and therefore” the derailleur actuation ratio on even a current ST-3000 9 speed double shifter so it won’t work unless you get an FD-R3000 derailleur.

Take a look at the current front derailleurs and you’ll see the cable attach arm is much longer than the older road FD’s.

John

afm199

Before you replace, have you cleaned out the mung and grease?

marcpotash

I saw there was a new ST6510 left shifter for sale on eBay. It said it was a 2/3. Does that mean it would work with both a double and a triple or are they different items

Andrew R Stewart 

Yes. The 2/3 shifter has three (plus added trimming) positions. For a double one would set it up so the shifter's 1 and 2 position are in play. But do know that one can overpower the shifter past the 2 position and cause the shifter to not want to release down to the 1 position. Loosening the cable will relieve the tension on the pawls so it will shift back down. Of course one needs to retighten the cable after, not what one wants to do during a ride... Andy

Crankycrank

All Ultegra 6500 STI shifters can work with doubles or triples. I wish Shimano had kept up that practice with all succeeding generations of shifters but having said that you're looking at shifters that are around 20 yrs old and risky trying to find a shifter that still has some miles left in it.

delbiker1 

I have a Tiagra 4400 left shifter, 2/3 speed. It has some wear, scuffs, etc., but it works fine. If you have interest I can get a couple of pictures of it and post them here, or e-mail them to you. I think $20 plus shipping. It might ship in a set rate USPS envelope, about $7.75. If shipped in a small box, which I would be more comfortable with, just under $15. That, of course, depends on your location. I am in 19945.PM if you have interest.

dsbrantjr

This is why I set up a 3 speed shifter on a double to have the unused position make the cable slack, rather than try to use the high limit to lock out a shift past the big ring, just to avoid the shifter jamming you mention.

70sSanO

I recently stumbled on this chart. I have no idea how accurate it is but, if it is correct, it does show the impact of a 2/3 shifter and trim depending on how you set it up.

Setting it up as a double with the middle-outer shifter positions can eliminate any available trim for some models.


John

marcpotash

I Ebayed a new left shifter, 6500/6510 Ultegra. They mistakenly sent me a Dura Ace 7700 left shifter. I know it is a 9 speed but is the cable throw the same as the Ultegra? It is for a friend so I'll ask him whether he would keep the Dura Ace or send it back, assuming it would work the same.

70sSanO

Dura Ace 7700 uses the same cable pull as the Ultegra 6500.

Dura Ace 74XX, which was not 9 speed, pulled less cable because the 74XX rear derailleur had a different actuation ratio.

John

KCT1986

The shifting ratio is the same for the left ST-7700/-C and ST-65xx and will work the same for double cranks. Haven't used the 7700 enough to comment on "feel" of the shifting.

The internal mechanics are different. The 7700 is harder to access the internals if a real good cleaning is needed. Also requires a special tool to remove the brake cable hook bracket which needs to come off to get to the pawls & gears.

The 65xx can be torn-down with common tools giving you access to the pawls and gears.

With the age of these units, it would not be surprising if the grease is hardening and may need to be replaced sooner or later.

marcpotash

Thanks!